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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2430. Отображено 100.
12-01-2012 дата публикации

Apparatus for Localized Coating of Cascade Impactor Particle Collection Surfaces

Номер: US20120009330A1
Автор: Clyde L. Witham
Принадлежит: Individual

The invention relates to apparatuses and methods for applying a coating material to the collection surfaces of the stages after an impactor is assembled for use. The apparatuses and methods comprise generation of a multimodal droplet aerosol of liquid coating material and delivering it into the impactor. The coating substance improves the trapping of particles on the stages. The apparatuses and methods limit the total amount of coating material applied and confine it to the regions of particle impact opposite the stage orifices, thereby reducing the possibility of chemical interference when analyzing a test aerosol.

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Номер записи: 1
21-06-2012 дата публикации

Display control device

Номер: US20120154348A1
Автор: Hiroki Okuno
Принадлежит: Individual

An air purifier includes a detection apparatus, calculates a relative value of the number of microorganisms detected from airborne particles by the detection apparatus to a prescribed total value, and determines a central angle α corresponding to the relative value. Further, regarding the number of airborne particles other than microorganisms detected by the detection apparatus as the number of dusts, relative value of dust particles to a prescribed total value is calculated, and the central angle β corresponding to the relative value is determined. On a display panel, the amount of microorganisms is displayed as a bacteria meter by the area from the start position to the angle α, and by the following area to the angle β, the number of dusts is displayed as a dust meter, in a circle graph.

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Номер записи: 2
16-05-2013 дата публикации

Particle Detector and Method for Producing Such A Detector

Номер: US20130120749A1
Автор: Nicoletti Sergio
Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

The invention relates to a particle detector including a substrate () made of a semiconductor material, in which at least one through-cavity () is formed, defined by an input section () and an output section (), wherein the input section thereof is to be connected to an airflow source, said substrate supporting: an optical means including at least one laser source (), and at least one waveguide () connected to said at least one laser source and leading into the vicinity of the output section of said cavity; and photodetector means () located near the output section of said cavity and offset relative to the optical axis of the optical means. 1. A particle detector comprising a substrate in which at least one through-cavity , delimited by an entry cross section and an exit cross section , is formed , its entry cross section being intended to be connected to a source of an air flow , said substrate supporting:optical means comprising at least one laser source and at least one waveguide, which is connected to said at least one laser source and the end of which is located in proximity to the exit cross section of said cavity, andphotodetector means located in proximity to the exit cross section of said cavity and offset with respect to the optical axis of said optical means, in order to detect the scattered light.2. The detector as claimed in claim 1 , wherein the optical means and the photodetector means are located on the same face of the substrate.3. The detector as claimed in claim 1 , wherein said at least one cavity has a variable cross section which decreases from the entry cross section to the exit cross section.4. The detector as claimed in claim 1 , wherein the optical means also comprise at least one photonic device claim 1 , at the opposite end of the waveguide from the laser source.5. The detector as claimed in claim 1 , wherein the photodetector means comprise a plurality of photodetectors associated with a through-cavity.6. The detector as claimed in claim ...

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Номер записи: 3
16-05-2013 дата публикации

Dynamic Light Scattering for in vitro Testing of Bodily Fluids

Номер: US20130122538A1
Автор: Cheryl Pittendreigh, Elisabeth Maurer
Принадлежит: CANADIAN BLOOD SERVICES

A method of diagnosing a pathological condition by detecting microparticles in a sample of bodily fluid using dynamic light scattering (DLS) is disclosed. The detection of microparticles in the bodily fluid by DLS may be used as an indicator of existing disease, to evaluate a risk of disease, as well, as to monitor the efficacy of a treatment for disease.

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Номер записи: 4
23-05-2013 дата публикации

Automatic analyzer and automatic analysis method

Номер: US20130132022A1
Автор: Masaki Shiba, Sakuichiro Adachi, Takuo Tamura
Принадлежит: Hitachi High Technologies Corp

An automatic analyzer is capable of reducing the influence of scattered light having noise components to enhance the S/N ratio properties of a light reception signal. Data is obtained at a plurality of angles by a plurality of detectors and a signal obtained by one detector selected from among the detectors is selected as a reference signal. An approximation is applied by an approximation selection unit, and an approximation calculation unit calculates an approximation using the selected approximation. A degree of variability of the reference signal is determined and a data correction unit corrects the signal of the detector by dividing the signal of the detector by the degree of variability of the reference signal. A concentration calculation processing unit performs the concentration calculation by use of the corrected signal data, and a result output unit outputs the results on a display.

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Номер записи: 5
18-07-2013 дата публикации

SCATTERED LIGHT MEASURING METHOD

Номер: US20130182252A1
Автор: Haaga Gerhard, Neuendorf Michael, Sieg Raymond, Stengel Karl
Принадлежит:

A scattered light method for measuring particle-dependent parameters of gases, in particular particle-dependent parameters of internal combustion engine exhaust gases or other colloids, includes introducing a particle-containing gas into a measuring chamber; emitting a light beam into the measuring chamber; receiving light scattered by the particles using at least two scattered light sensors, the scattered light sensors generating scattered light sensor signals, each being a function of the light received by the respective scattered light sensor; determining an average particle size from the scattered light sensor signals from at least two scattered light sensors and determining at least one further particle parameter from the previously determined average particle size and the scattered light sensor signals. 110-. (canceled)11. A scattered light method for determining at least one particle-dependent parameter of particle-containing gases , in particular particle-containing exhaust gases of an internal combustion engine , the method comprising:a) introducing a particle-containing gas into a measuring chamber;b) emitting a light beam into the measuring chamber;c) receiving scattered light, which has been scattered on particles contained in the gas, using at least two scattered light sensors, the scattered light sensors generating scattered light sensor signals, each scattered light sensor signal being a function of the scattered light received by the respective scattered light sensor;d) determining an average particle size from the scattered light sensor signals of the at least two scattered light sensors; ande) determining at least one additional particle parameter from the previously determined average particle size and from the scattered light sensor signals.12. The method according to claim 11 , wherein the scattered light sensors are at least one of embodied and situated such that the sensors detect the scattered light claim 11 , which has been scattered at ...

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Номер записи: 6
22-08-2013 дата публикации

PARTICLE DIAMETER DISTRIBUTION MEASUREMENT DEVICE

Номер: US20130215423A1
Автор: SAWA Hiroyoshi, TOCHINO Shigemi
Принадлежит: HORIBA, LTD.

A dynamic scattering type particle diameter distribution measurement device comprising a light receiving part that receives scattered light emitted from the particle group and that outputs a pulse signal in accordance with a photon number of the received light, a plurality of multibit counters that receives the pulse signal while a gate is open and counts a pulse number, a correlator that obtains auto-correlation data from time series data of the pulse number, and a calculation part that calculates particle diameter distribution based on the auto-correlation data, a gate time changing part that changes gate time once or a plurality of times and a gate time judging part that compares mutually the differences between the maximum value and the minimum value of the auto-correlation data output every time the gate time is changed and judges the gate time corresponding to the maximum difference as a recommended value. 1. A particle diameter distribution measurement device comprisinga light irradiation part that irradiates light on a particle group that moves in a disperse medium,a light receiving part that receives scattered light emitted from the particle group on which the light is irradiated and that outputs a pulse signal in accordance with a photon number of the received light,a plurality of multibit counters that are arranged in parallel and each of which has a gate and receives the pulse signal while the gate is open and counts a pulse number,a correlator that obtains auto-correlation data from time series data of the pulse number obtained sequentially from each of the multibit counters, anda calculation part that calculates particle diameter distribution of the particle group based on the auto-correlation data obtained from the correlator, and further comprisinga gate time changing part that changes gate time once or a plurality of times anda gate time judging part that compares mutually, at every time when the gate time is changed, the differences between the ...

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Номер записи: 7
21-11-2013 дата публикации

INHALER ADAPTOR FOR A LASER DIFFRACTION APPARATUS AND METHOD FOR MEASURING PARTICLE SIZE DISTRIBUTION

Номер: US20130308130A1
Автор: Adamo Benoit, Shah Saiyam, Smutney Chad C.
Принадлежит:

The present disclosure relates to an improved device and methods for adapting to a laser diffraction apparatus used for measuring particle size distribution and density of the plume of a powder composition emitted from a dry powder inhaler. 1. A method of measuring at least one particle characteristic with a laser diffraction apparatus , comprising:providing a device comprising a chamber and configured to hold a breath-powered, dry powder inhaler in a closed environment; said breath-powered inhaler having a body and comprising a dry powder formulation;installing said breath-powered inhaler into said chamber so that the body of said dry powder inhaler is enclosed within said chamber;providing positive pressure into said chamber of said device to create a flow of air or gas through said dry powder inhaler to discharge particles of said dry powder formulation, andmeasuring said at least one particle characteristic with the laser diffraction apparatus,wherein the particles are emitted from the inhaler into a chamberless and/or ambient environment.2. The method of claim 1 , wherein said at least one particle characteristic is particle density.3. The method of claim 1 , wherein said at least one particle characteristic is particle size distribution.4. The method of claim 1 , wherein the breath-powered claim 1 , dry powder inhaler comprises a mouthpiece.5. The method of claim 4 , wherein said mouthpiece forms an air pathway from the chamber to the chamberless and/or ambient environment.6. The method of claim 1 , wherein the step of providing positive pressure into said chamber is attained by a source of pressurized gas from a flow controller system comprising a valve or a syringe pump.7. The method of claim 1 , wherein the positive pressure applied is greater than 1 kPa.8. The method of claim 1 , wherein the step of measuring with a laser diffraction apparatus occurs concurrent with emission of particles from the dry powder inhaler.9. A method of measuring at least one ...

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Номер записи: 8
05-01-2017 дата публикации

PARTICLE MEASURING DEVICE

Номер: US20170003221A1
Автор: ASANO Takamasa, HASEGAWA Yoshiki, KOIZUMI Kazuhiro, TAKEDA Naoki
Принадлежит: FUJI ELECTRIC CO., LTD.

A particle measuring device includes: an optical resonator that reflects laser light back and forth between two facing reflective mirrors in order to amplify an energy of that laser light and form resonant laser light; a particle transport unit that transports particles in an aerosol to be measured across a beam path of the resonant laser light; a scattered light receiving unit that receives scattered light produced when the particles in the aerosol are irradiated by the resonant laser light; and a processor that receives light reception signals from the scattered light receiving unit, wherein the processor outputs light reception pulses according to the light reception signals and calculates time intervals between the light reception pulses that are temporally adjacent. 1. A particle measuring device for measuring particles in an aerosol , comprising:an optical resonator that causes laser light to travel back and forth between two opposing reflective mirrors in order to amplify an energy of the laser light and form resonant laser light;a particle transport unit configured to transport the particles in the aerosol across a beam path of the resonant laser light so as to generate a stream of the particles crossing the beam path;a scattered light receiving unit configured to receive scattered light that is produced when the particles in the aerosol are irradiated by the resonant laser light, and output a light reception signal in accordance with the received scattered light for each scattering event; anda processor that receives the light reception signal from the scattered light receiving unit for each event of the reception of the scattered light,wherein the processor outputs a light reception pulse in accordance with each light reception signal from the scattered light receiving unit, and derives time intervals between light reception pulses that are temporally adjacent.2. The particle measuring device according to claim 1 , wherein the processor further derives a ...

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Номер записи: 9
05-01-2017 дата публикации

System and methods for estimation of mechanical properties and size of light-scattering particles in materials

Номер: US20170003271A1
Автор: Seemantinin K. Nadkarmi, Zelnab Hajjarian
Принадлежит: General Hospital Corp

System and method for determining a viscoelastic modulus of a sample with the use of optical data and an average size of light-scattering particles, of such sample, that has been derived from the optical data in reliance of angular dependence of a radiant flux profile determined from laser speckles formed by the sample and, in required, on a refractive index mismatch between light-scattering particles and sample medium hosting such particles. The determination is optionally carried out by taking into account at least one of absorption coefficient and reduced scattering coefficient of the sample, which are also determined from the same optical data. Laser speckle may be formed for different combinations of polarization states of sample-illuminating light and detected light and/or different wavelengths to account for polydisperse nature of the sample.

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Номер записи: 10
27-01-2022 дата публикации

Complex particle measurement apparatus

Номер: US20220026330A1
Автор: Hisashi Akiyama, Makoto Nagura, Takashi KIMBA, Takeshi Akamatsu, Yasuhiro Tatewaki, Yohei Oka
Принадлежит: Horiba Ltd

A complex particle measurement apparatus comprising a first light source that irradiates a first storage cell; a photodetector that detects intensity of light; a second light source that irradiates a second storage cell; an imaging unit that images a particle group; an image data output unit that outputs image data; a supporter that supports the first storage cell and the second storage cell; and a communication pipe that connects the first storage cell and the second storage cell to pass a sample solution, wherein the first storage cell and the second storage cell have bottom surfaces located at positions different from each other, and the communication pipe is laid such that a channel from the first storage cell to the second storage cell has an incline of not less than 0 or not more than 0.

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Номер записи: 11
12-01-2017 дата публикации

METHOD AND DEVICE FOR DETERMINING CHARACTERISTIC PROPERTIES OF A TRANSPARENT PARTICLE

Номер: US20170010197A1
Автор: SCHAEFER Walter, TROPEA Cameron
Принадлежит:

The invention relates to a method for determining the size d of a transparent particle, according to which method the particle is illuminated with light from a light source, a radiation detector measures a time-resolved intensity profile of light of the light source scattered by the particle, a reflection peak () and a refraction peak are determined in the intensity profile and the size d of the particle is determined based on a time difference between the reflection peak () and the refraction peak. The method according to the invention is characterized in that the time-resolved intensity profile is measured at a definable scattering angle θs, a first second-order refraction peak () and a second second-order refraction peak () having a mode different from that of the first refraction peak () being determined, a characteristic variable γ being determined as the ratio of a first time difference Δtbetween the reflection peak () and the first refraction peak () and of a second time difference Δtbetween the reflection peak () and the second refraction peak (), and the size of only those particles being determined for which the characteristic variable γ corresponds to a definable value. 1. A method for determining characteristic properties of a transparent particle , wherein the particle is illuminated with light from a light source , wherein a time-resolved intensity profile of light from the light source that is scattered at the particle is measured by a radiation detector at a predefinable scattering angle θ , wherein characteristic scattered light peaks are determined in the intensity profile , and wherein a size of the particle is determined based on a time difference between two scattered light peaks ,wherein a first time difference is determined between a first pair of scattered light peaks and a second time difference is determined between a second pair of scattered light peaks, a characteristic variable is determined from the ratio of the first time difference ...

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Номер записи: 12
10-01-2019 дата публикации

Measuring electrophoretic mobility

Номер: US20190011398A1
Автор: John F. Miller
Принадлежит: Individual

An apparatus and method to obtain electrophoretic mobility information from a dilute colloidal dispersion using electrophoretic light scattering (ELS) is disclosed. Both laser Doppler electrophoresis and phase analysis light scattering data analysis methods may be applied to a scattered light signal simultaneously. Unlike previous ELS apparatuses and methods, the disclosed apparatus and method can measure electrophoretic mobility distributions in high ionic strength media. It can detect the presence of electrochemical phenomena such as electrode polarization and electrolysis, and apply corrections to the measured electrophoretic mobility values thus providing electrophoretic mobility information about samples with greater accuracy, precision, and reliability than prior ELS implementations. Improvements to the optical configuration of the apparatus are also disclosed that increase the robustness of the apparatus. Many of the aspects of the disclosure may be applied to the measurement of electrophoretic mobilities of particles in low polarity media and also particles with low surface charge in polar or non-polar media with greater accuracy, precision, and reliability than prior ELS implementations.

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Номер записи: 13
19-01-2017 дата публикации

Bio Sensor and Air Cleaner Having Same

Номер: US20170016638A1
Автор: Seong-Jin Yun
Принадлежит: Coway Co Ltd

There is provided a biosensor, which may measure the concentration of indoor bioaerosols through an optical sensing method of sensing ultraviolet light scattered by bioaerosols, and an air cleaner having the same. The biosensor includes a light irradiator and an ultraviolet light sensor detecting scattered ultraviolet light, from light irradiated by the light irradiator, reflected from bioaerosols. The biosensor may measure the concentration of indoor bioaerosols through the optical sensing method in real time, using a certain wavelength of ultraviolet light scattered by bioaerosols, and may allow the air cleaner to be operated under proper conditions based on a measured concentration of bioaerosols and a measured concentration of dust particles.

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Номер записи: 14
22-01-2015 дата публикации

SYSTEMS AND METHODS FOR DETERMINING SPECIFIC GRAVITY AND MINEROLOGICAL PROPERTIES OF A PARTICLE

Номер: US20150020588A1
Автор: LARSON Thomas Robert
Принадлежит:

A system includes a particulate material sample that contains a fluid medium and a plurality of particles dispersed in the fluid medium. The system further includes a particle analysis apparatus having a sample cell and sample delivery means for delivering the particulate material sample to the sample cell, wherein the particle analysis apparatus is adapted to obtain particle information on at least one particle in that particulate material sample while the at least one particle is in the sample cell. Furthermore, the system also includes fluid manipulation means for manipulating movement of the fluid medium while the particle analysis apparatus is obtaining the particle information on the at least one particle, and a data processing apparatus that is adapted to determine a specific gravity of the at least one particle based on the obtained particle information. 1. A system , comprising:a particulate material sample comprising a fluid medium and a plurality of particles dispersed in said fluid medium;a particle analysis apparatus comprising a sample cell and sample delivery means for delivering said particulate material sample to said sample cell, wherein said particle analysis apparatus is adapted to obtain particle information on at least one particle in said particulate material sample while said at least one particle is in said sample cell;fluid manipulation means for manipulating movement of said fluid medium while said particle analysis apparatus is obtaining said particle information on said at least one particle; anda data processing apparatus that is adapted to determine a specific gravity of said at least one particle based on said obtained particle information.2. The system of claim 1 , wherein said fluid medium comprises an incompressible fluid.3. The system of claim 1 , wherein said particle information comprises at least one of a size and a velocity of said at least one particle.4. The system of claim 1 , wherein said particle information comprises a ...

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Номер записи: 15
22-01-2015 дата публикации

ANALYSIS AND CONTROL OF AEROSOL FLOW

Номер: US20150020804A1
Автор: Bentvelsen Petrus Henricus Cornelius, Boots Henri Marie Joseph, Huijgen Hendrik, Lammers Jeroen Herman, SCHIPPER Alphonsus Tarcisius Jozef Maria, Van Der Mark Martinus Bernardus, VAN DER SLUIS Paul, VERSCHUEREN ALWIN ROGIER MARTIJN
Принадлежит:

An aerosol generation system has a light source arrangement which provides signals at first and second wavelengths, and the detected light signals are recorded. The detected signals are processed to derive at least a measure of the aerosol particle size. This can be used in combination with the other parameters which are conventionally measured, namely the aerosol density and flow velocity. Thus, optical measurement (possibly in combination with an air flow measurement) can be used to estimate the aerosol output rate as well as the particle size. 1. An aerosol generation system , comprising:{'b': '1', 'a flow device () for generating an aerosol flow;'}{'b': 6', '3, 'a light source arrangement () and a light detector () for detecting light which has interacted with the aerosol flow;'}{'b': '9', 'a controller () for controlling the light source arrangement and for interpreting the detected light signals;'}wherein the controller is adapted to:control the light source arrangement to provide a first signal at a first wavelength and to record a first detected light signal;control the light source arrangement to provide a second signal at a second wavelength and to record a second detected light signal; processing the first and second detected signals to determine measurements of the obscuration at each of the first and second wavelengths;', 'comparing the measurements of the obscuration at each of the first and second wavelengths to a function relating the modulation on the amount of light scattering by an aerosol flow to particle size variation; and, 'process the first and second detected signals to derive a measure of the aerosol particle size byderiving a measure of the aerosol particle size from the result of the comparison.23. A system as claimed in claim 1 , wherein the light detector () is for detecting light which has passed through the aerosol flow.3. A system as claimed in claim 2 , further comprising a dye added to an aerosol liquid.48. A system as claimed in ...

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Номер записи: 16
21-01-2021 дата публикации

PARTICLE DETECTION FOR SUBSTRATE PROCESSING

Номер: US20210018449A1
Автор: BANNA SAMER, Egan Todd, KIRK Gregory, RAVID ABRAHAM, SHEN Yaoming, TANTIWONG KYLE, VAEZ-IRAVANI Mehdi
Принадлежит:

A system for processing a substrate is provided. The system includes a process chamber including one or more sidewalls enclosing a processing region; and a substrate support. The system further includes a passageway connected to the process chamber; and a first particle detector disposed at a first location along the passageway. The first particle detector includes an energy source configured to emit a first beam; one or more optical devices configured to direct the first beam along one or more paths, where the one or more paths extend through at least a portion of the passageway. The first particle detector further includes a first energy detector disposed at a location other than on the one or more paths. The system further includes a controller configured to communicate with the first particle detector, wherein the controller is configured to identify a fault based on signals received from the first particle detector. 1. A system for processing a substrate comprising: one or more sidewalls enclosing an interior region; and', 'a substrate support in the interior region;, 'a process chamber comprisinga first passageway disposed outside of the process chamber and connected to the process chamber, the first passageway configured to exhaust gas from the interior region of the process chamber or supply gas to the interior region of the process chamber; and an energy source configured to emit a first beam;', 'one or more optical devices configured to direct the first beam along one or more paths, wherein the one or more paths extend through at least a portion of the first passageway; and', 'a first energy detector disposed at a location other than on the one or more paths; and, 'a first particle detector disposed at a first location along the first passageway, wherein the first particle detector comprisesa controller configured to communicate with the first particle detector, wherein the controller is configured to identify a fault based on signals received from the ...

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Номер записи: 17
26-01-2017 дата публикации

USE OF FOCUSED LIGHT SCATTERING TECHNIQUES IN BIOLOGICAL APPLICATIONS

Номер: US20170023456A1
Автор: Gabriel Don
Принадлежит:

Methods for using focused light scattering techniques for the optical sensing of biological particles suspended in a liquid medium are disclosed. The optical sensing enables one to characterize particles size and/or distribution in a given sample. This, in turn, allows one to identify the biological particles, determine their relative particle density, detect particle shedding, and identify particle aggregation. The methods are also useful in screening and optimizing drug candidates, evaluating the efficacy and dosage levels of such drugs, and in personalized medicine applications. 112-. (canceled)13. A method of determining the efficacy of a putative therapeutic agent , comprising:a) obtaining a spectra showing particle size and distribution for a sample medium which includes a biological particle of interest with a receptor to which a putative therapeutic agent will bind, by passing the sample medium past a focused light beam formed by passing a collimated light beam through an acceptance aperture to narrow the width of the beam,using focused light scattering techniques to prepare a spectrum showing particle size distribution from within the sample medium, where particle size is reflected by the location of one or more peaks on the spectrum, and the number of particles is reflected by the area under the curve of the peak,b) incubating the sample medium with a putative therapeutic agent,c) obtaining a second spectra showing particle size and distribution on the incubated sample medium using focused light scattering techniques, andd) determining whether the particle size and distribution has been altered by the incubation of the putative therapeutic agent, a change in the particle size and/or distribution is indicative of a complex formation of the putative therapeutic agent and the biological particle,wherein said focused light scattering techniques involve sensing single particles suspended in a sample medium when the sample medium is passed through a focused beam ...

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Номер записи: 18
26-01-2017 дата публикации

Portable device for monitoring environmental conditions

Номер: US20170023458A1
Автор: Justin Lam, Kevin R. Hart, Taylor Cooper, Vlad Lavrovsky
Принадлежит: Tzoa/clad Innovations Ltd

A portable environment quality monitor having an enclosure to enclose and protect the monitor from an environment and for attaching to a user's clothing or jewelry. The enclosure includes a controlled airflow intake for receiving air from the environment in which the monitor is worn for forming an airflow sampling path and for laminarizing the airflow in the sampling path. A sensor, having a sensing region that directs the laminar airflow into the sensing region. A processor is connected to a light scattering aerosol spectrometer (LSAS) that is configured to receive, process and translate photodiode current peaks into particle counts and sizes detected in the air. The processor is also coupled to a memory for storing data corresponding to the particle counts and sizes detected in the environment. The processor further includes an interface to communicate with a host for allowing a user to monitor and track environment conditions.

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Номер записи: 19
25-01-2018 дата публикации

METHOD OF ESTIMATING CLOUD PARTICLE SIZES USING LIDAR RATIO

Номер: US20180024036A1
Автор: Anderson Kaare Josef, Ray Mark
Принадлежит:

Apparatus and associated methods relate to determining sizes of water particles in a cloud atmosphere based on a detected portion of signals generated from a single monochromatic source and backscattered by water particles in a cloud atmosphere. A backscatter coefficient and an optical extinction coefficient are calculated, based on the detected portion of signals generated from the monochromatic source and backscattered by water particles in the cloud atmosphere. A LIDAR ratio—a ratio of the optical extinction coefficient to the backscatter coefficient, is calculated. Sizes of water particles in the cloud atmosphere are estimated based on the LIDAR ratio. An output signal indicative of the estimated sizes of water particles in the cloud atmosphere is generated. Estimating sizes of water particles using signals from a single monochromatic source advantageously can alert a pilot of an aircraft of cloud conditions, without requiring multi-chromatic sources. 1. A system for measuring an effective size of water particles in a cloud atmosphere , the system comprising:a laser configured to generate a pulse of light of a wavelength and to direct the pulse of light into the cloud atmosphere;an optical detector configured to detect a portion of the pulse of light backscattered by the water particles in the cloud atmosphere; anda cloud metric calculator configured to determine, based on the detected portion of the pulse of light backscattered by the water particles in the cloud atmosphere, an optical extinction coefficient and a backscatter coefficient,wherein the cloud metric calculator is further configured to estimate, based on a ratio of the determined optical extinction coefficient to the determined backscatter coefficient, the effective size of the water particles in the cloud atmosphere.2. The system of claim 1 , wherein the cloud metric calculator is configured to estimate the effective size of the water particles in the cloud atmosphere using a look-up table.3. The ...

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Номер записи: 20
25-01-2018 дата публикации

MULTI-FIBER OPTICAL SENSOR FOR ICING

Номер: US20180024270A1
Автор: Anderson Kaare Josef, Ray Mark
Принадлежит:

Apparatus and associated methods relate to sampling a large volume of a cloud atmosphere so as to obtain a large signal response from even a sparse distribution of water droplets in the cloud atmosphere. Such a volume can be probed by projecting an uncollimated optical beam into the cloud atmosphere and sampling the signal backscattered from the water droplets located within the probed volume. The uncollimated optical beam can be generated by projecting a diverging pulse of light energy from a polished end of a first optical fiber. A second optical fiber can be used to receive the optical signal backscattered from the cloud atmosphere. The second optical fiber can also have substantially the same field of view as the first optical fiber, so as to receive signals from a volume of the cloud atmosphere that is substantially commensurate with the probed volume. 1. A system for measuring cloud conditions comprising:a laser diode configured to generate a pulse of light energy;a transmitter fiber configured to receive the generated pulse of light energy and to project the received pulse of light energy into a cloud atmosphere, the projected pulse of light energy projected over a field of view determined by a numerical aperture of a transmission end of the transmitter fiber;a receiver fiber having a reception end aligned proximate and substantially parallel to the transmission end of the transmitter fiber, the receiver fiber configured to receive a portion of the transmitted pulse of light energy backscattered by the cloud atmosphere; anda detector configured to detect the portion of the transmitted pulse of light energy received by the receiver fiber,wherein a numerical aperture of the reception end of the receiver fiber is substantially equal to the numerical aperture of the transmission end of the transmitter fiber.2. The system of claim 1 , wherein the numerical apertures of the transmission end of the transmitter fiber and the reception end of the receiving fiber are ...

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Номер записи: 21
24-01-2019 дата публикации

DISTINGUISHING PROTEIN AGGREGATION MECHANISMS

Номер: US20190025178A1
Автор: REED Wayne Frederick, Rees Daniel J.
Принадлежит:

Method, device, and system for identifying a model-based time dependent light scattering signature that includes receiving an experimental time dependent light scattering signature comprising experimental data descriptive of an average molecular weight of protein components in a solution over time. The method further includes identifying an Ansatz for evaluating the experimental time dependent light scattering signature, the Ansatz being an initial model-based time dependent light scattering signature, the initial model-based time dependent light scattering signature identifying at least one key variable. The method also includes adjusting the at least one key variable in the initial model-based time dependent light scattering signature until a final model-based time dependent light scattering signature is identified. In some instances, the final model-based time dependent light scattering signature identifies at least one protein aggregation mechanism. 140-. (canceled)41. At least one non-transitory computer readable medium comprising instructions stored thereon , the instructions effective to cause a computing system to:receive an experimental time dependent light scattering signature (ETS), the ETS comprising experimental data related to an average molecular weight of biological polymer components in a solution over time;identify an Ansatz for evaluating the ETS, the Ansatz being an initial value for at least one key variable in a generalized mechanistic model (GMM); andadjust the at least one key variable in the GMM until a final model-based time dependent light scattering signature (MTS) is identified, the final MTS sufficiently matching the ETS;wherein the at least one key variable is a rate constant value in the GMM.42. The at least one non-transitory computer readable medium of claim 41 ,wherein the final model-based time dependent light scattering signature identifies at least one biological polymer aggregation mechanism; andwherein the instructions are ...

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Номер записи: 22
23-01-2020 дата публикации

Method and apparatus for determining particle characteristics utilizing a plurality of beam splitting functions and correction of scattered light

Номер: US20200025665A1
Автор: Michael Trainer
Принадлежит: Individual

Apparatus and methods for determining information about at least one particle by measuring light scattered from the particles. Scattered light is combined with light from a light source to produce an optical interference signal utilizing a plurality of beam splitting functions. Scattered light signals are corrected for signal components which are not derived from particle scatter.

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Номер записи: 23
28-01-2021 дата публикации

APPARATUS AND METHOD FOR MEASURING PARTICULATE MATTER

Номер: US20210025802A1
Автор: CHANG Ho Jun, LEE Woo Chang, PARK Yun S
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

Provided is an apparatus for measuring particulate matter, the apparatus including an air inflow device configured to receive air including particulate matter particles, two or more light sources configured to respectively emit light of different wavelengths to the air received, a pattern measuring device configured to measure scattering patterns for each wavelength of light based on detecting light that is forward-scattered by the particulate matter particles and light that is back-scattered by the particulate matter particles, and a processor configured to obtain a size of the particulate matter particles and a concentration of the particulate matter particles based on the scattering patterns for each wavelength of light. 1. An apparatus for measuring particulate matter , the apparatus comprising:an air inflow device configured to receive air comprising particulate matter particles;two or more light sources configured to respectively emit light of different wavelengths to the air received;a pattern measuring device configured to measure scattering patterns for each wavelength of light based on detecting light that is forward-scattered by the particulate matter particles and light that is back-scattered by the particulate matter particles; anda processor configured to obtain a size of the particulate matter particles and a concentration of the particulate matter particles based on the scattering patterns for each wavelength of light.2. The apparatus of claim 1 , wherein the processor is further configured to obtain the size of the particulate matter particles and the concentration of the particulate matter particles based on a particulate matter estimation model that defines the size of the particulate matter particles and the concentration of the particulate matter particles that corresponds to the scattering patterns for each wavelength of light.3. The apparatus of claim 1 , wherein the two or more light sources comprise:a first light source configured to emit ...

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Номер записи: 24
28-01-2021 дата публикации

OPTICAL DETECTING SYSTEM

Номер: US20210025803A1
Автор: CHO Kyoung Man, Jeong Ji Eun, Kim Nam Kyun, Kim Young Dug, Yang Seung Bum
Принадлежит:

According to an embodiment of the present disclosure, provided is an optical detection system for detecting a laser speckle generated by multiple scattering of a wave irradiated toward a sample from a wave source, and based on a change in the laser speckle over time, detecting the presence of microbes in the sample in real time. 1. An optical measurement apparatus comprising:a wave source;an optical unit configured to transfer a wave generated in the wave source to a first path or a second path;a first speckle generation unit disposed on the first path and including a static scattering medium to scatter the first wave incident along the first path and generate a first speckle;a first image sensor configured to detect the first speckle in time series order;a sample accommodation unit disposed on the second path and including a sample to be measured;a second image sensor configured to detect an optical signal generated in the sample in time series order; anda controller configured to obtain a temporal correlation of the first speckle using the detected first speckle and control an operation of the second image sensor based on the obtained temporal correlation of the first speckle.2. The optical measurement apparatus of claim 1 , wherein the sample accommodation unit comprises a second speckle generation unit configured to scatter a second wave incident along the second path and generate a second speckle.3. The optical measurement apparatus of claim 2 , wherein the controller obtains a temporal correlation of a detected second speckle using the detected second speckle claim 2 , and estimates the presence or concentration of microbe in the sample based on the obtained temporal correlation of the second speckle.4. The optical measurement apparatus of claim 1 , wherein the controller determines a change in the property of the first wave based on the temporal correlation of the first speckle claim 1 , and controls an operation of the second image sensor according to the ...

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Номер записи: 25
01-02-2018 дата публикации

ULTRASONIC PARTICLE SIZE MEASUREMENT DEVICE AND ULTRASONIC MEASUREMENT DEVICE

Номер: US20180031464A1
Автор: NORISUYE Tomohisa
Принадлежит: National University Corporation Kyoto Institute of Technology

An ultrasonic particle size measurement device includes: a transducer for (i) receiving an ultrasonic pulse scattered after being emitted to a fine particle and (ii) generating a first scattering amplitude ψ; and a particle size calculating section for calculating a particle size of the fine particle by calculating an amplitude r and a phase θ in accordance with a real part and an imaginary part, respectively, of a second scattering amplitude ψ obtained by subjecting the first scattering amplitude ψ to a Fourier transform. 1. An ultrasonic particle size measurement device comprising:an ultrasonic wave receiver for (i) receiving an ultrasonic pulse scattered after being emitted to a fine particle sedimenting in a liquid and (ii) generating a first scattering amplitude ψ (t,T) based on a propagation time t of the ultrasonic pulse and an observation time T with respect to motion of the fine particle; anda particle size calculating section for (i) generating a second scattering amplitude ψ (f,T) obtained by subjecting the first scattering amplitude ψ (t,T) to a Fourier transform in a direction of the propagation time t, (ii) calculating an amplitude r (f,T) and a phase θ (f,T) in accordance with a real part and an imaginary part, respectively, of the second scattering amplitude ψ (f,T), and (iii) calculating a particle size of the fine particle in accordance with the amplitude r (f,T) and the phase θ (f,T).2. The ultrasonic particle size measurement device as set forth in claim 1 , wherein the particle size calculating section calculates a motion velocity of the fine particle in accordance with the amplitude r (f claim 1 ,T) and the phase θ (f claim 1 ,T) and calculates the particle size in accordance with the motion velocity.3. The ultrasonic particle size measurement device as set forth in claim 1 , wherein the particle size calculating section generates a complex correlation function in accordance with the amplitude r (f claim 1 ,T) and the phase θ (f claim 1 ,T) and ...

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Номер записи: 26
17-02-2022 дата публикации

Photoelectric smoke sensor tube

Номер: US20220050039A1
Автор: Dennis Michael Gadonniex, Joseph Anthony VIDULICH
Принадлежит: Carrier Corp

A smoke detector for an air duct includes a photoelectric detection system and an air flow pathway in fluid communication with the air duct. The air flow pathway includes an inlet, an optic tube, and an outlet. The photoelectric detection system includes a circuit board having at least one light emitter and at least one light receiver mounted thereon. The optic tube passes through the circuit board and between the at least one light emitter and at least one light receiver.

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Номер записи: 27
31-01-2019 дата публикации

METHOD AND DEVICE FOR DETECTION AND/OR MORPHOLOGIC ANALYSIS OF INDIVIDUAL FLUID-BORNE PARTICLES

Номер: US20190033191A1
Автор: Kiselev Denis
Принадлежит:

Measurement device for the detection and/or analysis of fluid-borne particles, the measurement device comprising means (′) for producing a flow of fluid along a fluid flow path, a laser () positioned for emitting a beam () of laser light in a measurement volume of the fluid flow path; a lens set () for collecting laser light () scattered in the measurement volume by fluid-borne particles () contained in the flow of fluid, a photo-detector () positioned for the detection of scattered laser light () collected by the lens set (), wherein the lens set () is configured for focusing the scattered light () in a line at a focal distance (f) of the lens set (), said line being perpendicular to a flow direction (y) of the flow of fluid in said measurement volume; and wherein the photo-detector () is a linear multipixel detector for capturing the laser light focused by the lens set (), wherein said linear multipixel detector () is positioned at a distance from the focal distance (f) of the lens set () and oriented with its longitudinal axis parallel to said line. Measurement method for the detection and/or analysis of fluid-borne particles, comprising the steps of producing a flow of fluid along a fluid flow path, said flow of fluid potentially containing fluid-borne particles () to be detected; emitting a beam () of laser light in a measurement volume of the fluid flow path; collecting laser light () scattered in the measurement volume by fluid-borne particles () contained in the flow of fluid and focusing said scattered light in a line at a focal distance (f), said line being perpendicular to a flow direction (y) of the flow of fluid in said measurement volume; capturing the collected and focused scattered laser light () with a linear multipixel photo-detector () positioned at a distance from the focal distance (f) and oriented with its longitudinal axis parallel to said line; repeating the steps of emitting, collecting and capturing a plurality of times during the time of ...

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Номер записи: 28
31-01-2019 дата публикации

Measurement device for measuring fine particulate matter in at least one volume of air for a vehicle, particularly for a motor vehicle

Номер: US20190033224A1
Автор: Thomas Niemann, Uwe Roeben
Принадлежит: Hella GmbH and Co KGaA

In a measurement device for measuring fine particulate matter in at least one volume of air for a vehicle, particularly for a motor vehicle, having at least one laser light source, having at least one calibration device assigned to the laser light source, and having at least one measurement chamber, it is provided according to the invention that the at least one laser light source is assigned to at least two measurement chambers, the measurement chambers are formed by segments of air handling ducts to direct the air volumes to be tested, and at least one optical receiving device is assigned to each measurement chamber.

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Номер записи: 29
01-05-2014 дата публикации

SYSTEMS, PROCESSES, METHODS AND MACHINES FOR TRANSFORMING IMAGE DATA INTO SIZING AND VOLUME MEASUREMENTS FOR TISSUE

Номер: US20140119633A1
Автор: McCord Roy
Принадлежит: Prodo Laboratories

Automated islet measurement systems (AIMS) in combination with tissue volume analysis (TVA) software effectively gauges volumetric and size-based data to generate heretofore unavailable information regarding, for example, populations of islet cells, stem cells and related desiderata. 1. An automatic tissue scanning camera (ATSC) system , which comprises , in combination:a monochrome CCD camera;a horizontally-mounted culture flask;trans-illumination means, which means exceeds the deep field image size by a factor of at least two;wherein placement of the flask between the illuminator and camera coaxially and opposed on crossed, ultra precision mechanical stages driven by processing means, generates rectangular arrays of continuous digital images, and;whereby the density of any one cell, for example an islet cell, is derived as a function of scattering, absorption, and thickness.2. A system according to claim 1 , further comprising claim 1 , tissue volume analysis (TVA) software claim 1 , using thresholding to identify individual cells claim 1 , for example islet cells claim 1 , and to evaluate cross-sectional linear size of cells claim 1 , for example islet cells claim 1 , via an algorithmic simulacrum of manual counting under microscopy.3. A system according to claim 2 , wherein said TVA software measures the optical transmission of each pixel within each cell claim 2 , for example islet cell claim 2 , using this to calculate thickness of tissue at that pixel based upon optical extinction; and claim 2 ,based on constant pixel area, calculates volume represented by respective pixels;whereby voxels, volume elements, are then summed to generate resultory total cell, for example islet cell, volume.4. A system according to claim 1 , wherein an automated image measurement algorithm is employed.5. A system according to claim 2 , wherein an automated image measurement algorithm is employed.6. A system according to claim 3 , wherein an automated image measurement algorithm is ...

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Номер записи: 30
17-02-2022 дата публикации

Suction Particle Detection System With Light Guide System

Номер: US20220051538A1
Автор: Hartwig Jonas
Принадлежит:

The invention relates to a suction particle detection system () for detecting a fire, comprising a fluid line system () which opens into one or more monitored areas (i), and having a suction device (), connected in a fluid-guiding manner to the at least one pipe and/or hose line () in order to generate a test fluid flow () along the at least one pipe and/or hose line (), and a light guiding system () having one or more local detector modules () and designed for the local capture and transmission of scattered light scattered at scattering and/or smoke particles and/or designed for the capture and transmission of transmitted light passing through the scattering and/or smoke particles. In the suction particle detection system () at least one light guide () is connected to the one or more local detector modules () and a central analysis device () for evaluation. 1. A suction particle fire detection system , for detecting or locating a fire or a fire emergence , comprising{'b': ['200', '210', '220', '230', '210', '211', '210'], '#text': 'a fluid guiding system () having at least one pipe or hose line () which, via one or more suction openings () for the respective removal of an amount of test fluid, opens into one or more monitored areas (i), and having a suction device (), which is connected in a fluid-guiding manner to the at least one pipe or hose line () in order to generate a test fluid flow () along the at least one pipe or hose line (), and'}{'b': ['300', '320', '220', '211', '310', '320', '110', '320'], '#text': 'a light guiding system () having one or more local detector modules () each assigned to at least one suction opening () and designed for local capture and transmission of scattered light scattered at particles or smoke particles present in the respective monitored area (i) or the test fluid flow (), and configured for the capture and transmission of transmitted light passing through the particles or smoke particles, and having at least one light guide () ...

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Номер записи: 31
30-01-2020 дата публикации

Method and Apparatus of Filtering Light Using a Spectrometer Enhanced with Additional Spectral Filters with Optical Analysis of Fluorescence and Scattered Light from Particles Suspended in a Liquid Medium Using Confocal and Non Confocal Illumination and Imaging

Номер: US20200033192A1
Автор: Edward Calvin
Принадлежит: Charted Scientific Inc

A system for filtering light using a spectrometer enhanced with spectral filters using an array of independent photodetectors to measure the fluorescent or scattered light signal. A system comprising a light source, an illuminated sample, a light spectrum device, a collimator lens, a plurality of spectral filters each having a varying and selected light transmission spectrum and a plurality of photodetectors wherein each photodetector is oriented to a spectral filter. A scanning cytometer for measuring fluorescence and light scattering from an illuminated portion of the sample comprising a first light source, a scanner scanning in two axes, a fluorescence detector, an objective lens, an optically translucent medium through which a sample may be illuminated and a confocal apparatus positioned distally from the light source and sample and through which light signals from the sample are transmitted to a fluorescence detector.

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Номер записи: 32
30-01-2020 дата публикации

OPTICAL DETECTOR OF PARTICLES

Номер: US20200033244A1
Автор: Boutami Salim, Nicoletti Sergio
Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

The present invention relates to a particle detector comprising at least an optical device configured to emit a luminous radiation; and a substrate extending in a plane and defining a channel intended to receive particles, the channel extending principally in a direction perpendicular to the principal plane; characterised in that the detector comprises a matrix of photo detectors and a reflecting surface; the matrix of photo detectors and the reflecting surface being disposed on mutually parallel planes and situated on either side of said portion of the substrate so that a part of the luminous radiation passes through the channel by being diffracted by a particle, then reflects off the reflecting surface, and then reaches the matrix of photo detectors. 1. A particle detector comprising at least:an optical device able to be connected to at least one light source and configured to emit at least one luminous radiation generated by said light source; anda substrate extending in a principal plane and defining a portion at least of at least one channel intended to receive a fluid comprising particles, said at least one channel extending principally in a direction perpendicular to the principal plane, a portion at least of the substrate being configured to receive a portion at least of the luminous radiation emitted by the optical device;wherein the detector further comprises a matrix of photo detectors and at least one reflecting surface;the matrix of photo detectors extending in a first plane and the reflecting surface extending in a second plane, said first and second planes being parallel to the principal plane and situated on either side of said portion of the substrate, so that a portion at least of the luminous radiation emitted by the optical device passes through said at least one channel by being diffracted by at least one particle, then reflects off the reflecting surface, and then reaches the matrix of photo detectors.2. The detector according to wherein the ...

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Номер записи: 33
30-01-2020 дата публикации

PARTICLE CHARACTERISATION

Номер: US20200033245A1
Автор: CORBETT Jason, MALM Alex
Принадлежит: Malvern Panalytical Limited

A method of characterising particles in a sample, comprising: obtaining a scattering measurement comprising a time series of measurements of scattered light from a detector, the scattered light produced by the interaction of an illuminating light beam with the sample; producing a corrected scattering measurement, comprising compensating for scattering contributions from contaminants by reducing a scattering intensity in at least some time periods of the scattering measurement; determining a particle characteristic from the corrected scattering measurement. 1. A method of characterising particles in a sample , comprising:obtaining a scattering measurement comprising a time series of measurements of scattered light from a detector, the scattered light produced by the interaction of an illuminating light beam with the sample;producing a corrected scattering measurement, comprising compensating for scattering contributions from contaminants by reducing a scattering intensity in at least some time periods of the scattering measurement;determining a particle characteristic from the corrected scattering measurement.2. The method of claim 1 , wherein reducing the scattering intensity comprises modifying a recorded scattering measurement3. The method of claim 1 , wherein reducing the scattering intensity comprises high-pass filtering the scattering measurement.4. The method of claim 1 , wherein reducing the scattering intensity comprises determining a contaminant parameter from the scattering measurement claim 1 , wherein the step of reducing the scattering intensity is responsive to the contaminant parameter.5. The method of claim 4 , wherein the contaminant parameter comprises a cut-off frequency for a filtering operation.6. The method of claim 4 , wherein determining the contaminant parameter comprises finding statistical outliers in spectral content of the scattering measurement.7. The method of claim 1 , wherein producing a corrected scattering measurement comprises ...

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Номер записи: 34
04-02-2021 дата публикации

Particle Detector

Номер: US20210033520A1
Автор: SAASKI ELRIC, YACOBI DOR
Принадлежит: CBRN INTERNATIONAL, LTD.

A particle detector, having a housing defining a chamber; an air stream injector, producing an airstream in said chamber from air taken from outside said chamber; a light source, producing a light beam that crosses the air stream and wherein said light beam is shaped so that a transverse extent of said light beam has a uniform intensity over said transverse extent of said air stream. Also, a photon detection assembly, including an optical train of lenses, is positioned to accept light from said light beam, emitted by the particles, and to focus this light onto a a photon detector. A particle detection assembly detects the particles, responsive the photon detection assembly. Finally, a particle size estimation assembly estimates size for each detected particle, based on number of photons detected by said photon detection assembly from said particle, as it crosses said light beam. 1. A particle detector , comprising:a. a housing defining a chamber;b. an air stream injection assembly, producing an airstream in said chamber from air taken from outside said chamber, and having a transverse extent;c. a light source, producing a light beam that intersects with and crosses said air stream at an angle, thereby forming an intersection, and wherein said light beam is sized and shaped so that a transverse extent of said light beam has a uniform intensity over said transverse extent of said air stream at said intersection;d. a photon detection assembly, including an optical train of lenses, configured and positioned to accept an amount of light from said light beam, emitted by particles in said air stream, and to focus said emitted light onto a detection surface of a photon detector;e. a particle detection assembly, detecting particles in said air stream in response to input from said photon detection assembly; andf. a particle size estimation assembly, responsive to said photon detection assembly, which estimates size for each particle detected, based on number of photons ...

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Номер записи: 35
30-01-2020 дата публикации

Method and Apparatus for Monitoring the Optical Output Power of a Laser Diode with an Associated Photodiode and Particle Sensor Device

Номер: US20200036157A1
Автор: Gerlach Philipp, Sofke Soren, Srowik Rico, Weidenfeld Susanne, Wolf Robert
Принадлежит:

The present invention provides methods and an apparatus for monitoring the optical output power of a laser diode (LD) having an associated photodiode (PD), and a particle sensor apparatus. The photodiode (PD) is operable together with the laser diode (LD), wherein it detects the light (LS) of the laser diode (LD) and converts it into an electrical current, and is thermally coupled to the laser diode (LD). Monitoring of the optical output power P is effected during the operation of the laser diode (LD) and is based on current measurements and/or voltage measurements at the laser diode (LD) and at the photodiode (PD). 1. A method for monitoring the optical output power P of at least one laser diode , wherein at least one photodiode is associated with the laser diode ,which is operable together with the laser diode,which detects the light of the laser diode and converts it into an electrical current IPD, andwhich is thermally coupled to the laser diode,wherein the optical output power P is monitored during the operation of the laser diode and the monitoring is based on current measurements and/or voltage measurements at the laser diode and at the photodiode.2. The method as claimed in claim 1 , wherein the laser diode (D) having the associated photodiode is a laser diode having an integrated photodiode claim 1 , in particular a VCSEL (vertical-cavity surface-emitting laser) having an integrated photodiode.3. The method as claimed in claim 1 , whereindetermining a respective instantaneous photodiode characteristic by way of measurements of the photodiode current IPD in dependence on the laser diode current ILD,determining the instantaneous threshold current Ith of the laser diode from the respective instantaneous photodiode characteristic,determining the slope PDSlope of the instantaneous photodiode characteristic for a laser diode current region within which the laser diode is in laser operation, andcapturing the laser diode voltage ULD for at least one specified laser ...

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Номер записи: 36
08-02-2018 дата публикации

THERMAL COMPENSATION

Номер: US20180038782A1
Автор: Corbett Jason Cecil William, LIGHTFOOT Nigel, POOLMAN Rhys, STRINGFELLOW David
Принадлежит: Malvern Instruments Limited

Method of characterizing particles suspended in a fluid dispersant by light diffraction, comprising: obtaining measurement data from a detector element, the detector element being arranged to measure the intensity of scattered light; identifying a measurement contribution arising from light scattered by inhomogeneities in the dispersant; processing the measurement data to remove or separate the measurement contribution arising from light scattered by inhomogeneities in the dispersant; calculating a particle size distribution from the processed measurement. The detector element is one of a plurality of detector elements from which the measurement data is obtained. The detector elements are arranged to measure the intensity of scattered light at a plurality of scattering angles, the plurality of scattering angles distributed over a plurality of angles about an illumination axis. Identifying a measurement contribution arising from light scattered by inhomogeneities in the dispersant comprises identifying measured scattered light that is asymmetric about the illumination axis. 2. (canceled)3. The method of claim 1 , wherein at least some of the plurality of scattering angles are alternately arranged between a first and second radial location about the illumination axis with increasing scattering angle.4. The method of claim 3 , wherein the first and second radial location about the scattering axis are separated by at least 90 degrees about the illumination axis.5. The method of claim 1 , wherein at least some of the detector elements are arranged with their centroids in a logarithmic series of scattering angles.6. The method of claim 1 , wherein obtaining a measurement comprises obtaining a time history of the intensity of scattered light from the detector element or the detector elements.7. The method of claim 6 , wherein identifying a measurement contribution arising from light scattered by inhomogeneities in the dispersant comprises identifying peaks in the ...

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Номер записи: 37
08-02-2018 дата публикации

IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, IMAGE CAPTURING DEVICE AND STORAGE MEDIUM

Номер: US20180038789A1
Автор: Itoh Yasuhiro
Принадлежит:

An attempt is made to suppress the processing load while securing real-time properties of the image processing to improve visual recognizability of a captured image whose visual recognizability has been reduced by the influence of fine particle components. An image processing apparatus including: an extraction unit configured to extract an atmospheric light component from a captured image including an influence of fine particles in the atmosphere; and a removal processing unit configured to generate an image from the captured image, in which the influence of fine particles has been removed, based on the extracted atmospheric light component, and the extraction unit performs the extraction based on data of the captured image and data of an exposure value at the time of photographing the captured image. 1. An image processing apparatus comprising:an extraction unit configured to extract an atmospheric light component from a captured image including an influence of fine particles in the atmosphere; anda removal processing unit configured to generate an image from the captured image, in which the influence of fine particles has been removed, based on the extracted atmospheric light component, whereinthe extraction unit performs the extraction based on data of the captured image and data of an exposure value at the time of photographing the captured image.2. The image processing apparatus according to claim 1 , whereinthe captured image is an image represented in an RGB color space, a unit configured to determine a predetermined threshold value for a luminance value based on the exposure value; and', 'a unit configured to convert an RGB value of a pixel in the captured image into a luminance value and to determine, by robust estimation processing, a pixel to estimate atmospheric light from pixels having the luminance value larger than or equal to the threshold value, and, 'the extraction unit hasthe extraction unit estimates atmospheric light based on a pixel value of ...

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Номер записи: 38
24-02-2022 дата публикации

SENSOR DEVICE, SYSTEM AND METHOD

Номер: US20220058927A1
Автор: Antar David, Galburt Paul, Jacovino Frank L., Plunkett John B.
Принадлежит:

Embodiments of a sensor device, method and system employ a multiplicity of environmental sensors as a single monitoring and alerting mechanism, operable to provide a profile of any contaminant in terms of various gases and particles in the atmosphere, quantified in terms of relative concentrations. In various embodiments, the sensor device can comprise hardware and firmware elements, including an electronic control system, a case, a shield and a cover. The environmental sensors can be secured as part of the electronic control system and the shield can be formed so as to facilitate proper channeling of air and sound for effective operation. 1. A system , comprising:a particle detection sensor;a gas detection sensor; and receive monitoring data from the particle detection sensor and the gas detection sensor; and', 'upon determining that at least a portion of the received monitoring data is indicative of a threshold for particulates from a vaping profile for human e-cigarette activity being exceeded and not indicative of a threshold for gas from the vaping profile being exceeded, generate a detected event communication., 'a processor, and a memory storing instructions, that when executed by the processor, cause the processor to2. The system of claim 1 , wherein the portion of the received monitoring data that is not indicative of the threshold for gas being exceeded comprises measurements of carbon dioxide and volatile organic compounds.3. The system of claim 1 , wherein the instructions claim 1 , when executed by the processor claim 1 , further cause the processor to:upon determining that at least a portion of the received monitoring data indicates that a threshold measurement of at least one gas and a threshold measurement of particles from a smoking profile have been exceeded, generate a detected smoking event communication.4. The system of claim 1 , wherein the instructions further cause the processor to determine a level of THC.5. A computer-implemented method ...

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Номер записи: 39
24-02-2022 дата публикации

SENSOR DEVICE, SYSTEM AND METHOD

Номер: US20220058928A1
Автор: Antar David, Galburt Paul, Jacovino Frank L., Plunkett John B.
Принадлежит:

Embodiments of a sensor device, method and system employ a multiplicity of environmental sensors as a single monitoring and alerting mechanism, operable to provide a profile of any contaminant in terms of various gases and particles in the atmosphere, quantified in terms of relative concentrations. In various embodiments, the sensor device can comprise hardware and firmware elements, including an electronic control system, a case, a shield and a cover. The environmental sensors can be secured as part of the electronic control system and the shield can be formed so as to facilitate proper channeling of air and sound for effective operation. 1. A system , comprising:a group of sensors comprising a particle detection sensor and a gas detection sensor, wherein the gas detection sensor comprises at least one of a carbon dioxide sensor and a total volatile organic compound sensor; anda processor, and a memory storing instructions, that when executed by the processor, cause the processor to:receive monitoring data from the group of sensors; andupon at least a portion of the received monitoring data indicating that a vaping profile specifying relative concentrations of particles and at least one gas for human e-cigarette activity is matched, generate a detected vaping event communication.2. The system of claim 1 , wherein the instructions claim 1 , when executed by the processor claim 1 , further cause the processor to:upon determining that at least a portion of the received monitoring data indicates that a threshold measurement of at least one gas and a threshold measurement of particles from a smoking profile have been exceeded, generate a detected smoking event communication.3. The system of claim 1 , wherein the instructions further cause the processor to determine a level of THC.4. A computer-implemented method claim 1 , comprising:receiving, by a computing device, monitoring data from at least one sensor from a group of sensors comprising a particle detection sensor ...

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Номер записи: 40
06-02-2020 дата публикации

SYSTEMS AND METHODS FOR DETECTING PARTICLES IN A FLUID CHANNEL

Номер: US20200041399A1
Автор: Gutierrez Michael, Homyk Andrew, Sinha Supriyo, Vyawahare Saurabh
Принадлежит: Verily Life Sciences LLC

Disclosed herein are systems and methods capable of identifying, tracking, and sorting particles or droplets flowing in a channel, for example, a microfluidic channel having a fluid medium. The channel and the fluid medium can have a similar refractive index such that they appear translucent or transparent when illuminated by electromagnetic radiation. The particles or droplets can have a refractive index substantially different from that of the channel and the medium, such that the particles or droplets interfere with the electromagnetic radiation. A sensor can be disposed adjacent to the channel to record the electromagnetic radiation. The sensor can be attached to a system for identifying, tracking, and sorting the droplets. 1. A system for detecting a particle in a channel , comprising:a channel comprising at least one particle dispersed in a medium, such that the at least one particle is moving from a first end of the channel to a second end of the channel;a source of electromagnetic radiation that illuminates at least a portion of the channel;a sensor to detect the at least one particle, wherein the sensor is positioned along a linear axis of the illuminated portion of the channel such that the sensor is substantially parallel to a direction of movement of the at least one particle through the channel; andan optical system that focuses and aligns the illuminated portion of the channel to the sensor.2. The system of claim 1 , wherein the sensor comprises a linear charge-coupled sensor claim 1 , a linear complementary metal-oxide-semiconductor sensor claim 1 , any suitable optical sensor claim 1 , or any combination thereof.3. The system of claim 1 , wherein the channel is positioned in or on a substrate.4. The system of claim 1 , wherein a source of electromagnetic radiation comprises an optical system.5. The system of claim 1 , comprising a plurality of particles and/or a plurality of channels and/or a plurality of linear sensors.6. The system of claim 1 , ...

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Номер записи: 41
16-02-2017 дата публикации

METHOD AND DEVICE FOR DETERMINING THE SIZE OF A TRANSPARENT PARTICLE

Номер: US20170045434A1
Автор: SCHAEFER Walter, TROPEA Cameron
Принадлежит:

A method is described for determining the size of a transparent particle (), wherein the particle () is illuminated with light from a light source (), wherein using a radiation detector () a time-resolved intensity curve of light from the light source () scattered on the particle () is measured at a preselectable scattering angle θ, wherein characteristic scattered light peaks are determined in the intensity curve, and wherein the size of the particle () is determined on the basis of the time difference between two scattered light peaks, characterized in that, with the help of two radiation detectors () or light sources (), a first and a second time-resolved intensity curve of scattered light, scattered on the particle () in the forward direction, are measured; a transmission peak () and a reflection peak () are determined from the first intensity curve and from the second intensity curve; a first time difference between the transmission peaks () is determined, and a second time difference between the reflection peaks () is determined; a characteristic variable α is determined from the ratio of the first time difference and the second time difference; and a size determination is performed for the particles () for which the characteristic variable α corresponds to a preselectable value. (FIG. ) 1. A method for determining the size of a transparent particle , wherein the particle is illuminated with light from a light source , wherein a time-resolved intensity curve of light from the light source scattered on the particle is measured at a preselectable scattering angle θusing a radiation detector , wherein characteristic scattered light peaks are determined in the intensity curve , and wherein the size of the particle is determined on the basis of the time difference between two scattered light peaks , wherein either (i) a first and a second time-resolved intensity curve of light from the light source , scattered on the particle in the forward direction , is measured ...

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Номер записи: 42
03-03-2022 дата публикации

SIZE DISTRIBUTION MEASUREMENT DEVICE, SIZE DISTRIBUTION MEASUREMENT METHOD, AND SAMPLE CONTAINER

Номер: US20220065766A1
Автор: ANZAI Yumiko, Minemura Hiroyuki, Nishihara Hiroyuki, OSAWA Kentaro, SUGAYA Masakazu
Принадлежит:

An object of the present invention is to provide an optical measurement technology capable of quantitatively measuring a size distribution of a particle that performs Brownian motion in a sample. A size distribution measurement device according to the present invention measures a reflected light intensity while scanning a focal point position along an optical axis direction of measurement light, and calculates the size distribution of the particle according to the highest reflected light intensity of the measured reflected light intensities (refer to FIG. ).

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Номер записи: 43
14-02-2019 дата публикации

Method for Rapidly Detecting Salmonella Typhimurium in Milk by Raman Microspectroscopy Based on Incorporation of Heavy Water

Номер: US20190049299A1
Автор: CHENG Yuliang, Feng Jingjing, GUO Yahui, Qian He, XIE Yunfei, YAO Weirong
Принадлежит:

A method for rapidly detecting in milk through a Raman spectrum based on heavy water marking. The method comprises the steps of adding to-be-detected milk possibly containing into culture media containing heavy water for culturing, then collecting cultured cells and conducting Raman spectrum scanning, and analyzing and processing an obtained original Raman spectrum, so that in the to-be-detected milk is detected. According to the method of the invention, DO marking is adopted, and the Raman spectrum is used for rapidly detecting in milk, so that the method has the advantages of being short in detection time (4-8 h), high in sensitivity, low in cost, easy to operate, convenient and fast to implement and the like; the detection limit is 10-10cfu/mL, interference from the matrix in a milk sample is small, and the method is an ideal method for rapidly detecting , has extremely good actual application prospects, and is suitable for being widely applied in the fields of food safety, environment monitoring and the like. 1S. typhimuriumsalmonellasalmonellaS. typhimurium. A method for rapidly detecting in milk through a Raman spectrum based on heavy water marking , characterized by comprising the steps of adding to-be-detected milk possibly containing into culture media containing heavy water for culturing , then collecting cultured cells and conducting Raman spectrum scanning , and analyzing and processing an obtained original Raman spectrum , so that in the to-be-detected milk is detected.2S. typhimurium. The method according to claim 1 , characterized in that if exists in the to-be-detected milk claim 1 , a CD peak appears in the corresponding original Raman spectrum within the range of 2040 cm-2300 cm.3. The method according to claim 1 , characterized by comprising the steps of:{'i': S. typhimurium', 'S. typhimurium', 'S. typhimurium, '(1) adding a series of seed solutions with different concentrations into the culture media containing heavy water for culturing for the ...

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Номер записи: 44
25-02-2021 дата публикации

PARTICULATE OBSERVATION DEVICE AND PARTICULATE OBSERVATION METHOD

Номер: US20210055197A1
Автор: KATO Haruhisa, Matsuura Yusuke, NAKAMURA Ayako
Принадлежит: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

The purpose of the present invention is to provide a particulate observation device using light scattering, which includes a means for determining the three-dimensional position of a particle, and can measure an accurate particle size or impart various properties of same. The present invention is characterized by including a position determination means which captures, with an optical microscope, an image of light scattered from particles in a dispersion medium to which laser light is emitted, and determines a three-dimensional position of each particle from the obtained two dimensional image, wherein the position determination obtains two-dimensional coordinates along the two-dimensional image from luminescent point positions of the particles, and determines the depth position along a coordinate axis vertical to the two-dimensional image from the diameters of diffraction fringes of the luminescent points. 1. A particulate observation device that uses light scattering , comprising:an optical microscope unit that images light scattered from particles in a dispersion medium to which laser light is emitted; and a processing unit that determines a three-dimensional position for each of the particles from a two-dimensional image obtained by the optical microscope unit,wherein the optical microscope unit provides the two-dimensional image by considering bright spots having diffraction fringes to be the particles, andthe processing unit obtains, from bright spot positions of the particles, two-dimensional coordinates that follow the two-dimensional image, and determines, from a diameter of the diffraction fringes of the bright spots, a depth position along a coordinate axis perpendicular to the two-dimensional image.2. The particulate observation device according to claim 1 , wherein the processing unit determines a magnitude of Brownian motion of the particles from the three-dimensional position claim 1 , and provides a particle size from the magnitude.3. The particulate ...

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Номер записи: 45
25-02-2021 дата публикации

CHARACTERIZATION OF A CLOUD ATMOSPHERE USING LIGHT BACKSCATTERED AT TWO ANGLES

Номер: US20210055422A1
Автор: Alexander Jennifer M., Anderson Kaare Josef, Jackson Darren G., Ray Mark
Принадлежит:

Apparatus and associated methods relate to determining an effective size, quantity, shape, and type of water particles in a cloud atmosphere based on differences in amplitudes of optical signals backscattered at different backscattering angles. Off-axis backscattering—backscattering at angles other than 180 degrees—is affected by the effective size, quantity, shape, and type of water droplets. Detected amplitudes of optical signals that are backscattered at different angles are used to indicate the effective size, quantity, shape, and type of water particles in the cloud atmosphere. In some embodiments, optical emitters and detectors are configured to measure amplitudes of optical signals backscattered at backscattering angles of both on-axis—180 degrees—and off-axis varieties. 1. A system for characterizing a cloud atmosphere , the system comprising:an optical emitter configured to emit an optical beam into the cloud atmosphere;a first optical detector configured to detect a first portion of the optical beam backscattered by the cloud atmosphere at a first backscatter angle;a second optical detector configured to detect a second portion of the optical beam backscattered by the cloud atmosphere at a second backscatter angle different from the first backscatter angle; anda cloud-characteristic calculator configured to calculate one or more cloud parameters of the cloud atmosphere based on the detected first and second portions.2. The system of claim 1 , wherein cloud-characteristic calculator is configured to calculate one or more cloud parameters of the cloud atmosphere based on a ratio of the detected first and second portions.3. The system of claim 1 , wherein cloud-characteristic calculator is configured to calculate one or more cloud parameters of the cloud atmosphere based on a difference between the detected first and second portions.4. The system of claim 1 , wherein a magnitude of a difference between the first and second backscatter angles is at least 3 ...

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Номер записи: 46
13-02-2020 дата публикации

AUTOMATIC ANALYSIS APPARATUS, AUTOMATIC ANALYSIS METHOD, AND STORAGE MEDIUM

Номер: US20200049606A1
Автор: Masumura Takahiro, Sugita Satoru, Tahara Hirotoshi
Принадлежит:

An automatic analysis apparatus includes a reaction vessel configured to contain a reaction liquid in which a measuring object and a reagent are mixed with each other, an irradiation unit configured to irradiate the reaction vessel with irradiation light as predetermined incident light polarization, a measurement unit configured to measure light emitted from the reaction vessel, and a processor configured to process a signal having a specific polarization component obtained from the measurement unit and to analyze the measuring object. The specific polarization component is determined based on the condition of the reaction liquid. 1. An automatic analysis apparatus comprising:a reaction vessel configured to contain a reaction liquid in which a measuring object and a reagent are mixed with each other;an irradiation unit configured to irradiate the reaction vessel with irradiation light as predetermined incident light polarization;a measurement unit configured to measure light emitted from the reaction vessel; anda processor configured to process a signal having a specific polarization component obtained from the measurement unit and to analyze the measuring object,wherein the specific polarization component is determined based on the condition of the reaction liquid.2. The automatic analysis apparatus according to wherein the measurement unit includes a polarization selector configured to select an arbitrary polarization component in the emitted light claim 1 , and a detector configured to measure the emitted light having an arbitrary polarization component claim 1 , andwherein the processor extracts and processes the signal having the specific polarization component from the arbitrary polarization component based on the condition of the reaction liquid.3. The automatic analysis apparatus according to claim 2 , wherein the incident light polarization is a linear polarization claim 2 , andwherein the arbitrary polarization component includes at least one of a ...

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Номер записи: 47
13-02-2020 дата публикации

APPARATUS AND METHOD FOR LASER PARTICLE SENSOR EYE SAFETY

Номер: US20200049625A1
Автор: Fan Xiao Zhu, Garde Jason, Kimmel Danny Thomas, Lodden Grant
Принадлежит: HONEYWELL INTERNATIONAL INC.

In one embodiment, a particle sensor on or in a vehicle is provided. The laser particle sensor comprises an optical system; a processing system coupled to the optical system; wherein the optical system is configured to transmit one or more laser light beams to detect particles in a volume of freestream fluid, and to have the one or more light beams terminate on a portion of the vehicle on which the optical system is mounted; and wherein the optical system is configured to receive a backscattered portion of the one or more laser light beams transmitted by the optical system. 1. A laser particle sensor on a vehicle , comprising:an optical system;a processing system coupled to the optical system;wherein the optical system is configured to transmit one or more laser light beams to detect particles in a volume of freestream fluid, and to have the one or more light beams terminate on a portion of the vehicle on which the optical system is mounted; andwherein the optical system is configured to receive a backscattered portion of the one or more laser light beams transmitted by the optical system.2. The laser particle sensor of claim 1 , wherein the portion of the vehicle is at least partially covered with a light absorbent material.3. The laser particle sensor of claim 1 , wherein the portion of the vehicle reflects a portion of incident light approximately parallel to a vertical axis of a body of the vehicle.4. The laser particle sensor of claim 1 , wherein the vehicle comprises an aircraft claim 1 , wherein the optical system is mounted to a fuselage of the aircraft claim 1 , wherein the portion of the aircraft comprises a winglet of the aircraft.5. The laser particle sensor of claim 1 , wherein the vehicle comprises an aircraft claim 1 , wherein the optical system is mounted to a wing of the aircraft or a winglet of the aircraft claim 1 , wherein the portion of the aircraft comprises a stabilizer of the aircraft or a fuselage of the aircraft.6. The laser particle sensor ...

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Номер записи: 48
22-02-2018 дата публикации

Atmospheric Particle Counting

Номер: US20180052090A1
Автор: Chang Josephine B., HAMANN HENDRIK F., MURALIDHAR RAMACHANDRAN, van Kessel Theodore G., WANG Jun Song
Принадлежит:

Atmospheric particle detectors having a hybrid measurement cavity and light baffle are provided. In one aspect, an atmospheric particle detector includes: an optical measurement cavity; a light baffle attached to the optical measurement cavity, wherein the light baffle is configured to i) permit unobstructed airflow into the optical measurement cavity and ii) block ambient light from entering the optical measurement cavity; a photodetector on a first side of the optical measurement cavity; a retro reflector on a second side of the optical measurement cavity opposite the photodetector, and a light source configured to produce a light beam that passes through the optical measurement cavity without illuminating the photodetector. A method for particle detection using the atmospheric particle detector is also provided. 1. An atmospheric particle detector , comprising:an optical measurement cavity;a light baffle attached to the optical measurement cavity, wherein the light baffle is configured to i) permit unobstructed airflow into the optical measurement cavity and ii) block ambient light from entering the optical measurement cavity, and wherein the light baffle comprises a semicircular-shaped conduit;a photodetector on a first side of the optical measurement cavity;a retro reflector on a second side of the optical measurement cavity opposite the photodetector; anda light source configured to produce a light beam that passes through the optical measurement cavity without illuminating the photodetector.2. (canceled)3. The atmospheric particle detector of claim 1 , wherein the photodetector is selected from the group consisting of: a photodiode claim 1 , an avalanche diode claim 1 , a photomultiplier tube claim 1 , and combinations thereof.4. The atmospheric particle detector of claim 1 , wherein the light source is selected from the group consisting of: a diode laser claim 1 , a gas laser claim 1 , a light emitting diode (LED) claim 1 , an incandescent source claim 1 , ...

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Номер записи: 49
26-02-2015 дата публикации

CHARACTERIZATION OF POLYMER AND COLLOID SOLUTIONS

Номер: US20150056710A1
Автор: DRENSKI Michael Felix, Reed Alex Wayne, REED Wayne Frederick
Принадлежит:

Simultaneous Multiple Sample Light Scattering systems and methods can be used to for polymer stability testing and for applying stressors to polymer or colloid solutions including heat stress, ultrasound, freeze/thaw cycles, shear stress and exposure to different substances and surfaces. among others, that create a polymer stress response used to characterize the polymer solution and stability. 1. A simultaneous multiple sample light scattering (SMSLS) detection device comprising:at least two light scattering cells configured to contain polymer or colloid solutions;a stressor module coupled to at least one of the two or more light scattering cells and configured to introduce a stressor to the polymer or colloid solutions contained in at least one light scattering cell; anda photodetector coupled to at least one of the plurality of light scattering cells configured to detect scattered light.2. The SMSLS device of claim 1 , wherein the stressor module comprises a stirring device.3. The SMSLS device of wherein the stressor is a temperature modifying device configured to adjust the temperature within the at least one of the two or more light scattering cells.4. The SMSLS device of claim 1 , wherein the stressor module is configured to introduce a substance in at least one of the two or more light scattering cells.5. The SMSLS device of claim 1 , wherein the stressor module is configured to introduce an energy source into the at least one of the two or more light scattering cells.6. The SMSLS device of claim 1 , further comprising:an incident light source configured to supply incident light to the plurality of light scattering cells;a rastering device coupled to at least one of the plurality of light scattering cells that is configured to move the at least one light scattering cell in a controlled pattern through the incident light; andwherein the photodetectors are further configured to detect the scattered light emitted through the rastered light scattering cell.7. The ...

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Номер записи: 50
15-05-2014 дата публикации

Localized dynamic light scattering system with doppler velocity measuring capability

Номер: US20140132943A1
Автор: Lidek Chou
Принадлежит: Individual

A localized dynamic light scattering measurement system includes a beam displacer for splitting an incident beam having two orthogonal linearly polarized beam components with slightly different frequencies into two orthogonal linearly polarized output beams focused onto an object to be measured. The beam displacer cooperates with an iris to collect and recombine scattering beams each reversely backscattered at 180 degrees from the object so as to form a signal beam, which is polarized by a polarizer to produce two polarization components, thereby generating a heterodyne interference signal associated with the polarization components. A signal processing unit obtains measurement data on the object based on power spectrum or autocorrelation data corresponding to the heterodyne interference signal.

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Номер записи: 51
10-03-2022 дата публикации

Method of inspecting lubricating oil composition and method of producing lubricating oil composition

Номер: US20220074840A1
Автор: Hitomi KANE, Kunio Kondo, Ryuji Monden, Yasuyuki Sakaguchi
Принадлежит: Showa Denko KK

The invention provides a method of inspecting a lubricating oil composition and a method of producing a lubricating oil composition. The inspecting method is capable of stably reproducing wear resistance characteristics by using a relatively easy measuring method even in the case where the lubricating oil composition contains a fullerene. In the method of inspecting the lubricating oil composition, the particle size (r) of particles present in the lubricating oil composition containing a base oil and fullerene is measured, and the lubricating oil composition is sorted on the basis of a predetermined range of the particle size (r) set by the relationship between the measured value of the particle size (r) and the measured value of the wear coefficient of the lubricating oil composition.

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Номер записи: 52
02-03-2017 дата публикации

PARTICLE TRACKING ANALYSIS METHOD USING SCATTERED LIGHT (PTA) AND DEVICE FOR DETECTING AND IDENTIFYING PARTICLES OF A NANOMETRIC ORDER OF MAGNITUDE IN LIQUIDS OF ALL TYPES

Номер: US20170059471A1
Автор: BOECK Margaret, WACHEMIG Hanno
Принадлежит: PARTICLE METRIX GMBH

A method and device for optically detecting particles () have the following features: (a) a cell wall () of rectangular cross-section, made of black glass, is fitted on a longitudinal surface and adjoining transverse surface with an L-shaped heating and cooling element (); (b) the centre of the transverse surface of the cell wall () opposite the transverse surface which forms the support of the cell wall () is irradiated by an irradiation device and is observed at right angles to the optical axis of the irradiation device by means of an observation device; (c) the focus of the irradiation device and the focus of the observation device can be moved by a motor to any point in the three-dimensional inner region defined by the cell wall () by means of a control device; (d) the surface of the cell wall () opposite the optical glass window () through which the radiation from the irradiation device enters comprises another optical glass window () in the centre thereof; (e) the temperature of the surface of the cell wall () is monitored by means of two thermistors (). 1239: An apparatus for detecting and characterizing particles () in liquids of all types of the order of magnitude of nanometers of a suspension in a cell wall () , having the following features:{'b': 9', '11', '1', '9', '2', '4, 'f) a cell wall () of rectangular cross section made of black glass with optical windows () sintered in has an L-shaped heating and cooling element () applied to a longitudinal face and an adjoining transverse face, the cell wall () bearing on the transverse face on a stand base () which is mounted in a defined way by means of vibration dampers (),'}{'b': 9', '9', '11', '11', '6', '6, 'i': 'a', 'g) the cell wall () is irradiated on the transverse face which lies opposite the transverse face which forms the support of the cell wall () in the middle by an irradiation device through an optical glass window () and is observed at a right angle to the optical axis of the irradiation device ...

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Номер записи: 53
20-02-2020 дата публикации

PARTICLE SENSOR INCLUDING AT LEAST TWO LASER DOPPLER SENSORS

Номер: US20200056972A1
Автор: Jatekos Balazs, Kákonyi Róbert, PINTER Stefan, Ramsteiner Ingo, Scholten Dick
Принадлежит:

A particle sensor that includes a first laser Doppler sensor and at least a second laser Doppler sensor, as well as a control unit that is configured to carry out self-interference measurements with the first laser Doppler sensor and simultaneously with at least the second laser Doppler sensor. 110.-. (canceled)11. A particle sensor , comprising:a first laser Doppler sensor; andat least a second laser Doppler sensor; anda control unit configured to carry out a self-interference measurement with the first laser Doppler sensor and simultaneously with at least the second laser Doppler sensor.12. The particle sensor as recited in claim 11 , wherein:the first laser Doppler sensor includes a first optical system with a first external focal point and a first detection volume, andthe second laser Doppler sensor includes a second optical system with a second external focal point and a second detection volume.13. The particle sensor as recited in claim 12 , wherein the first detection volume and the second detection volume overlap.14. The particle sensor as recited in claim 11 , wherein:the first laser Doppler sensor has a first polarization direction, andthe second laser Doppler sensor has a second polarization direction that is different from the first polarization direction.15. The particle sensor as recited in claim 12 , wherein the first detection volume and the second detection volume do not overlap.16. The particle sensor as recited in claim 12 , wherein:at least one of the first laser Doppler sensor and the second laser Doppler sensor includes a movable beam-deflecting element as a result of which at least one of the first detection volume and the second detection volume is placeable at at least one location.17. The particle sensor as recited in claim 16 , wherein the movable beam-deflecting element is a micromirror.18. The particle sensor as recited in claim 12 , wherein at least one of the first optical system includes a variably locatable first external focal point ...

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Номер записи: 54
20-02-2020 дата публикации

Optical Particle Sensor Device and Method for Operating an Optical Particle Sensor Device

Номер: US20200056981A1
Автор: Adrian Jens-Alrik, Sofke Soren, Spruit Hans, van der Lee Alexander, Weiss Robert
Принадлежит:

The invention relates to an optical particle sensor device (), comprising an optical emitter device (), which is designed to emit a multitude N of measurement laser beams (L) into a vicinity of the optical particle sensor device (); a detector device (), which is designed to detect the measurement laser beams (L) scattered on particles in the vicinity of the optical particle sensor device () and to generate to generate a single measuring signal (E) assigned to this for each measurement laser beam (L); and an evaluation device (), which is designed to determine at least one estimated particle value for the number of particles per volume using at least one single measurement signal (E). The evaluation device () is designed to determine at least two estimated particle values for the number of particles per volume, which are based on at least partially different single measurement signals (E) and/or a different number of single measurement signals (E), and on the basis of at least part of the estimated particle values, to determine at least one output value for the particle load. 1. An optical particle sensor device , comprising:an optical emitter device, which is designed to emit a multitude N of measurement laser beams into a vicinity of the optical particle sensor device;a detector device, which is designed to detect the measurement laser beams scattered on particles in the vicinity of the optical particle sensor device and to generate a single measurement signal assigned to this for each measurement laser beam; andan evaluation device, which designed to determine at least one estimated particle value for the number of particles per volume using at least one single measurement signal,characterized in that the evaluation device is designeda. to determine at least two estimated particle values for the number of particles per volume, which are based on at least partially different single measurement signals and/or a different number of single measurement signals and,b. ...

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Номер записи: 55
04-03-2021 дата публикации

MULTI-ANGLE DYNAMIC LIGHT SCATTERING

Номер: US20210063295A1
Автор: CORBETT Jason, Hamilton Douglas
Принадлежит: Malvern Panalytical Limited

A method of determining particle size distribution from multi-angle dynamic light scattering data, comprising: obtaining a series of measured correlation functions g(θ) at scattering angles θ; and solving an equation comprising 2. The method of claim 1 , wherein the linear solver is NNLS claim 1 , and/or the non-linear solver is selected from Nelder-Mead simplex claim 1 , Levenberg-Marquardt and Gauss-Newton.3. The method of claim 1 , wherein the initial estimates for the scaling factors αto αare estimated by extrapolation of a correlation function to a zero-delay time (τ=0).4. The method of claim 1 , wherein the predefined exit tolerance is:a convergence criterion based the preceding residual, orthe predefined exit tolerance is an absolute residual threshold.5. The method of claim 1 , further comprising repeating the steps a) to e) for a different non-linear solver claim 1 , to determine which non-linear solver provides the smallest residual.6. The method of claim 1 , further comprising measuring a time history of scattered light intensity at each respective scattering angle claim 1 , θ claim 1 , and determining the correlation functions g(θ) for each scattering angle.8. The method of claim 7 , wherein the dynamic light scattering data is multi-angle data claim 7 , and each measurement time corresponds with a different measurement angle θ; or wherein the dynamic light scattering data is of single angle type claim 7 , and each measurement time i corresponds with the same measurement angle θ.9. (canceled)10. The method of claim 7 , wherein the computed noise contribution is based on the expected instrument response to a large particle in a scattering volume of the instrument; wherein the large particle is assumed to be at least 3 microns in diameter claim 7 , or at least 10 microns in diameter.12. The method of claim 7 , further comprising sequentially measuring a time history of scattered light intensity at each respective scattering angle claim 7 , θ claim 7 , and ...

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Номер записи: 56
04-03-2021 дата публикации

DEVICE AND METHOD FOR DETERMINING CHARACTERISTIC PARAMETERS OF THE DIMENSIONS OF NANOPARTICLES

Номер: US20210063296A1
Автор: Aubrit Florian, Jacob David, Sandre Olivier
Принадлежит:

According to one aspect, the subject of the present description is a device () for determining characteristic parameters of the dimensions of nanoparticles in suspension in a liquid. The device () comprises light-emitting means () configured to emit an incident light beam (B) that is linearly polarized along a polarization axis (P); a detecting unit () comprising a measurement arm () that is rotatable with respect to an axis of rotation (Δ), said detecting unit comprising first and second detection channels () that are separated by a polarization-splitting element () arranged in said measurement arm; a fixed sample holder (), configured to receive a container () of cylindrical symmetry of said sample, an axis of symmetry of the container being coincident with the axis of rotation of the measurement arm; and a control unit (). The polarization-splitting element () of the measurement arm is configured to simultaneously send, over each of the first and second detection channels, respectively, a first and second polarized component (B, B) of the beam (B) scattered by the sample, the polarization axes of the first and second polarized components being perpendicular. 1. A device for determining characteristic parameters of the dimensions of nanoparticles in suspension in a liquid medium , comprising:light-emitting means configured to emit an incident light beam that is linearly polarized along a polarization axis; a first detection channel with a first optical axis and', 'a second detection channel with a second optical axis, the first and second detection channels being separated by a polarization-splitting element arranged in said measurement arm;, 'a detecting unit comprising a measurement arm that is rotatable with respect to an axis of rotation, wherein said detecting unit is configured for optical detection of a plurality of beams scattered at a plurality of scattering angles, when the sample is illuminated by the incident beam, and comprisesa fixed sample holder, ...

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Номер записи: 57
12-03-2015 дата публикации

METHOD AND PARTICLE ANALYZER FOR DETERMINING A BROAD PARTICLE SIZE DISTRIBUTION

Номер: US20150070699A1
Автор: King Frederick David, Merchant Clark Adrien, Oma Peter
Принадлежит: ProteinSimple

A method and a particle analyzer are provided for determining a particle size distribution of a liquid sample including particles of a lower size range, particles of an intermediate size range, and particles of an upper size range. A dark-field image frame is captured in which the particles of the lower size range and the particles of the intermediate size range are resolved, and a bright-field image frame is captured in which the particles of the intermediate size range and the particles of the upper size range are resolved. Absolute sizes of the particles of the intermediate size range and the particles of the upper size range are determined from the bright-field image frame. Calibrated sizes of the particles of the lower size range are determined from the dark-field image frame by using the particles of the intermediate size range as internal calibration standards. 1. A method of determining a particle size distribution of a liquid sample with a particle analyzer; the liquid sample including particles of a lower size range that are resolvable by dark-field imaging , particles of an intermediate size range that are resolvable by dark-field imaging and by bright-field imaging , and particles of an upper size range that are resolvable by bright-field imaging; the particle analyzer including a sample cell , a dark-field light source , a bright-field light source , an imaging system , and a processing system including an analysis module; the method comprising:a) holding the liquid sample in the sample cell;b) illuminating the liquid sample in the sample cell with the dark-field light source in a dark-field geometry to yield scattered light;c) collecting, focusing, and detecting the scattered light with the imaging system to capture a dark-field image frame in which the particles of the lower size range and the particles of the intermediate size range are resolved;d) analyzing the dark-field image frame with the analysis module to locate images of the particles of the ...

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Номер записи: 58
10-03-2016 дата публикации

AN OPTICAL SYSTEM AND A METHOD FOR REAL-TIME ANALYSIS OF A LIQUID SAMPLE

Номер: US20160069786A1
Автор: BERG Tommy Winther, Olesen Tom, SPILLUM ERIK, VALVIK Martin Christian
Принадлежит:

An optical system suitable for determining a characteristic as a function of time of at least a part of a liquid volume comprising a plurality of objects. The optical system provides a fast detection of a change in the liquid volume. The optical system comprises—an optical detection assembly comprising at least one image acquisition device configured to acquire images of an image acquisition area; —a sample device comprising at least one sample container suitable for holding a sample of said liquid volume; —a translating arrangement configured to translate said image acquisition area through at least one part of said sample container to perform a scan along a scanning path through said part of said sample container; and—an image analyzing processing system. The optical system is programmed to perform consecutive scans through said at least one part of said sample container, wherein each scan comprises acquiring images at a plurality of image acquiring positions of the image acquisition area by the optical detection assembly along at least one scanning path of the scan. The image analyzing processing system is programmed to determine a set of features in the form of a set of values for each of a plurality of objects captured on said images from each respective scan and to determine for each scan at least one derived result, the derived result is derived from a plurality of the sets of values, and to present said derived result obtained from the respective, consecutive scans as a function of time. 2. The optical system of wherein the optical system is configured to acquire said images of said image acquisition area at said plurality of positions claim 1 , wherein said image acquisition area is at a standstill relative to the sample container.3. (canceled)4. The optical system of claim 1 , wherein the optical system is configured to acquire said images of said image acquisition area at said plurality of positions claim 1 , wherein a sample in the sample container at a ...

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Номер записи: 59
29-05-2014 дата публикации

METHOD AND APPARATUS FOR MEASURING PARTICLE SIZE DISTRIBUTION IN DRILLING FLUID

Номер: US20140146314A1
Автор: Freeman Michael A., Ronaes Egil
Принадлежит:

A method includes determining particle size distribution (PSD) in a fluid flow line based on a range of sizes for at least one particle in the fluid flow line and duration of reflection of a laser beam from the at least one particle. The laser beam is focused from a laser beam instrument in direct contact with the fluid low line. 120.-. (canceled)21. A method comprising:directly contacting a laser beam instrument with a fluid low line containing a wellbore fluid;determining chord length distribution for at least one particle in the fluid flow line;determining particle size distribution (PSD) for the at least one particle in the fluid flow line based on the chord length distribution determined; anddetermining bridging effect of bridging material correlating to the PSD, the bridging material to be added to the fluid flow line to bridge a pore or a fracture in a reservoir.22. The method of claim 21 , wherein the laser beam is directed from a laser beam source to a window within a laser beam instrument claim 21 , the window in communication with the fluid flow line.23. The method of claim 21 , wherein determining the chord length distribution is for a range of sizes for the at least one particle stored in software.24. (canceled)25. The method of further comprising:monitoring a change in PDS of the fluid flow line to determine a bridging material to be added to the fluid flow line.26. The method of further comprising:contacting the laser beam instrument with a return line to determine PSD in the return line containing wellbore fluid.27. The method of claim 21 , wherein determining the PSD for the at least one article in the fluid flow line is based on chances to the PSD in a fluid flow loop in communication with the fluid flow line.28. The method of claim 21 , wherein the determining PSD further comprises measuring a diameter of the at least one particle over a specified time interval to determine count of the at least one particle.29. A method comprising:receiving a ...

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Номер записи: 60
27-02-2020 дата публикации

MULTISPECTRAL SENSOR BASED ALERT CONDITION DETECTOR

Номер: US20200064248A1
Автор: HOUCK William D.
Принадлежит:

An optical detector device may receive a spectroscopic measurement from a multispectral sensor. The optical detector device may determine, based on the spectroscopic measurement, a particulate size of a particulate. The optical detector device may determine, based on the spectroscopic measurement, an identification of the particulate. The optical detector device may determine, based on the particulate size and the identification of the particulate, that an alert condition is satisfied. The optical detector device may trigger an alert based on determining that the alert condition is satisfied. 1. An optical detector device , comprising:one or more memories; and [ 'wherein the spectroscopic measurement is performed at a fixed angle across a range of wavelengths;', 'receive a spectroscopic measurement from a multispectral sensor,'}, 'determine, based on the spectroscopic measurement, a particulate size of a particulate;', 'determine, based on the spectroscopic measurement, an identification of the particulate;', 'determine, based on the particulate size and the identification of the particulate, that an alert condition is satisfied; and', 'trigger an alert based on determining that the alert condition is satisfied., 'one or more processors, communicatively coupled to the one or more memories, to2. The optical detector device of claim 1 , wherein the one or more processors are further to:determine one or more other particulate sizes of one or more other particulates;determine one or more other identifications of the one or more other particulates; and 'determine that the alert condition is satisfied based on the one or more other particulate sizes and the one or more other identifications of the one or more other particulates.', 'wherein the one or more processors, when determining that the alert condition is satisfied, are to3. The optical detector device of claim 1 , wherein the one or more processors are further to:transmit an instruction to cause a beam to be ...

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Номер записи: 61
27-02-2020 дата публикации

PARTICULATE MATTER VELOCITY MEASUREMENT AND SIZE ESTIMATION USING PARALLEL SELF-MIXING SENSING

Номер: US20200064249A1
Автор: Momtahan Omid, Mutlu Mehmet, YAN Miaolei, Yeh Richard
Принадлежит:

An apparatus for particulate matter (PM) measurement includes a first light source to generate a first light beam and a second light source disposed at a first distance from the first light source to generate a second light beam in parallel to the first light beam to illuminate a PM. The apparatus further includes a first light detector to measure a first timing corresponding to a first self-mixing signal resulting from a reflection and/or back-scattering of the first light beam from a PM, and a second light detector to measure a second timing corresponding to a second self-mixing signal resulting from a reflection and/or back-scattering of the second light beam from the PM. A processor can determine a first velocity of the PM based on a spatial separation between centers of the first light beam and the second light beam and a temporal separation between the first timing and the second timing. 1. An apparatus for particulate matter (PM) spatial and temporal separation measurement , the apparatus comprising:a first light source configured to generate a first light beam to illuminate a PM;a second light source disposed at a first distance from the first light source and configured to generate a second light beam in parallel to the first light beam to illuminate the PM;a first light detector configured to measure a first timing corresponding to a first self-mixing signal resulting from at least one of a reflection or back scattering of the first light beam from a PM;a second light detector configured to measure a second timing corresponding to a second self-mixing signal resulting from at least one of a reflection or back scattering of the second light beam from the PM; anda processor configured to determine a first velocity of the PM based on a spatial separation between centers of the first light beam and the second light beam and a temporal separation between the first timing and the second timing.2. The apparatus of claim 1 , wherein the first light source and the ...

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Номер записи: 62
27-02-2020 дата публикации

A SYSTEM AND A METHOD FOR COMPOSITIONAL ANALYSIS

Номер: US20200064281A1
Автор: Karlsson Jan, Orava Risto
Принадлежит:

A system () for producing analysis data indicative of presence of one or more predetermined components in a sample () is presented. The system includes source equipment () for directing a particle stream () towards the sample (), detector equipment () for measuring a distribution of particles scattered from the sample () as a function of a scattering angle (θ), and processing equipment () for producing the analysis data based on the measured distribution of the scattered particles and on reference information indicative of an effect of the one or more predetermined components on the distribution of the scattered particles. The scattering angle related to each scattered particle is an angle between an arrival direction of the particle stream and a trajectory () of the scattered particle. The system utilizes different directional properties of scattering related to different isotopes, different chemical substances, and different isomers. 2. (canceled)3. A system according to claim 1 , wherein the processing equipment is configured to use one of the following for seeking the simulation model composition with which the predetermined criterion is fulfilled: a Generative Adversial Deep Neural network claim 1 , a Non-negative Matrix Factorization claim 1 , a Genetic Algorithm.4. A system according to claim 1 , wherein the source equipment is configured to direct towards the sample at least one of: a neutron stream claim 1 , an alpha particle stream claim 1 , a beta particle stream claim 1 , a proton stream.5. A system according to claim 1 , wherein the source equipment is further configured to direct towards the sample at least one of: gamma photons claim 1 , X-ray photons.6. A system according to claim 1 , wherein the detector equipment is configured to detect energies of the scattered particles and the processing equipment is configured to use claim 1 , when producing the analysis data claim 1 , the measured energies of the scattered particles and information indicative ...

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Номер записи: 63
27-02-2020 дата публикации

PARTICLE SENSOR SYSTEM AND METHOD TO DETERMINE VISIBILITY FOR A VEHICLE

Номер: US20200066170A1
Автор: Garde Jason
Принадлежит: HONEYWELL INTERNATIONAL INC.

A system for determining visibility comprises a particle sensor unit mounted onboard a vehicle, and a processor unit in communication with the particle sensor unit. The particle sensor unit comprises a light source configured to transmit a light beam into an external air region; a set of receive optics configured to collect a scattered portion of the light beam from particles in the air region; and an optical detector configured to receive the collected scattered portion and measure a signal intensity. The processor unit is operative to perform a method for determining visibility that comprises analyzing data received from the particle sensor unit to determine particle distribution in a volume of the air region; performing particle differentiation to determine sizes and types of particles in the distribution; calculating visibility data based on the sizes and types of the particles; and outputting the visibility data to one or more onboard systems. 1. A system for determining visibility , the system comprising: at least one light source configured to transmit a light beam into an external interrogation air region;', 'a set of receive optics configured to provide at least one receive channel, the receive optics configured to collect a scattered portion of the transmitted light beam from at least one particle in the interrogation air region; and', 'an optical detector in communication with the at least one receive channel and configured to receive the collected scattered portion of the transmitted light beam, the optical detector operative to measure a signal intensity from the scattered portion, the signal intensity indicating a particle size of the at least one particle; and, 'a particle sensor unit mounted onboard a vehicle, the particle sensor unit comprising analyzing data received from the particle sensor unit to determine particle distribution in a volume of the air region;', 'performing particle differentiation to determine sizes and types of particles in the ...

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Номер записи: 64
05-06-2014 дата публикации

METHODS AND APPARATUS FOR DETERMINING CHARACTERISTICS OF PARTICLES

Номер: US20140152986A1
Автор: Trainer Michael
Принадлежит:

Method and apparatus are described for improving measurements of scattered light from particles by controlling multiple scattering and coincidence count levels. The scatter path in the particle dispersion and particle concentration are adjusted to reduce multiple scattering in ensemble particle scattering measurement. And the particle dispersion volume and particle concentration are adjusted to reduce coincidence counts in single particle scattering measurements. Alignment of the optical system, for measuring scattered light, is maintained by a reflection apparatus. 1. Apparatus for optimizing a path length of light in a particle dispersion to improve the measurement of light scattered from particles , comprising:a) an optical system for illuminating a particle dispersion,b) a detection system comprising at least one detector for quantifying characteristics of light related to light scattered by at least one of said particles,c) a sample cell, comprising two optical windows, which confine said particle dispersion and pass light, from a light source, through said particle dispersion to illuminate at least one of said particles,d) means for adjusting a separation between said optical windows to change a path length of light in said sample cell, wherein said adjusting is performed by utilizing an electronic controlled actuator, ande) means for controlling said actuator based upon characteristics of light scattered from at least one of said particles.2. Apparatus for adjusting the concentration of particles , comprising:a) means for introducing a plurality of particles into a first flow loop, the particles being contained in a fluid, and means for circulating the fluid through the first flow loop, andb) valve means for selectively allowing some of the fluid in the first flow loop to enter a second flow loop, distinct from the first flow loop, the second flow loop including means for counting and/or analyzing at least one particle flowing in the second flow loop,wherein ...

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Номер записи: 65
05-06-2014 дата публикации

System and Method for Separating Samples in a Continuous Flow

Номер: US20140152987A1
Автор: Linda Trinkle, Thomas Duensing
Принадлежит: Intellicyt Corp

One embodiment of the present invention provides for a method for identifying within a single record the location of each of a plurality of samples suspected of containing particles of interest wherein the single record is obtained from a flowing stream of the plurality of samples passing through a particle analyzer. The method comprises introducing into a conduit the plurality of samples suspected of containing particles of interest wherein each ones of the plurality of samples are separated by fluid gaps to produce a plurality of samples separated by fluid gaps and wherein each of the plurality of samples further comprises marker particles. The plurality of samples separated by fluid gaps are flowed through the conduit as a flowing sample stream to a detector of a particle analyzer. The particle analyzer is for example a flow cytometer. The particles of interest when present and/or marker particles are detected as the plurality of samples pass the detector of the particle analyzer. A record over time for the particles of interest when present and/or marker particles in each of the plurality of samples are obtained in the single file once the plurality of samples pass the incident beam of light of the particle analyzer. A time position in the record is identified where particles of interest within any one of the plurality of samples would be located if present based upon the detection of marker particles present within each combined sample from the flowing stream of the plurality of samples.

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Номер записи: 66
07-03-2019 дата публикации

PARTICLE DETECTION FOR SUBSTRATE PROCESSING

Номер: US20190072497A1
Автор: BANNA SAMER, Egan Todd, KIRK Gregory, RAVID ABRAHAM, SHEN Yaoming, TANTIWONG KYLE, VAEZ-IRAVANI Mehdi
Принадлежит: Applied Materials, Inc.

A system for processing a substrate is provided. The system includes a process chamber including one or more sidewalls enclosing a processing region; and a substrate support. The system further includes a passageway connected to the process chamber; and a first particle detector disposed at a first location along the passageway. The first particle detector includes an energy source configured to emit a first beam; one or more optical devices configured to direct the first beam along one or more paths, where the one or more paths extend through at least a portion of the passageway. The first particle detector further includes a first energy detector disposed at a location other than on the one or more paths. The system further includes a controller configured to communicate with the first particle detector, wherein the controller is configured to identify a fault based on signals received from the first particle detector. 1. A system for processing a substrate comprising: one or more sidewalls enclosing a interior region; and', 'a substrate support;, 'a process chamber comprisinga first passageway connected to the process chamber; and an energy source configured to emit a first beam;', 'one or more optical devices configured to direct the first beam along one or more paths, wherein the one or more paths extend through at least a portion of the first passageway; and', 'a first energy detector disposed at a location other than on the one or more paths; and, 'a first particle detector disposed at a first location along the first passageway, wherein the first particle detector comprisesa controller configured to communicate with the first particle detector, wherein the controller is configured to identify a fault based on signals received from the first energy detector of the first particle detector.2. The system of claim 1 , wherein the first particle detector further comprises a second energy detector disposed at a location other than on the one or more paths.3. The ...

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Номер записи: 67
24-03-2022 дата публикации

PARTICLE CHARACTERISATION

Номер: US20220091006A1
Автор: CORBETT Jason
Принадлежит: Malvern Panalytical Limited

An apparatus for particle characterisation, comprising: a sample cell for holding a sample; a light source configured to illuminate the sample with an illuminating beam and a plurality of light detectors, each light detector configured to receive scattered light resulting from the interaction between the illuminating beam and the sample along a respective detector path, wherein each respective detector path is at substantially the same angle to the illuminating beam. 1. An apparatus for particle characterisation , comprising:a sample cell for holding a sample;a plurality of light sources configured to illuminate the sample with a plurality of illuminating beams;a plurality of light detectors, each light detector configured to receive scattered light resulting from the interaction between an illuminating beam and the sample along a respective detector path, wherein each respective detector path is at substantially the same angle to the illuminating beam; and wherein the detector paths are arranged to respectively intersect with the illumination beams at a plurality of locations along the illumination beams;a plurality of optical fibres, each optical fibre corresponding with a light detector and arranged to couple light from the respective detector path to the corresponding light detector; wherein each optical fibre is arranged to receive the scattered light from the detector path at a first end portion;wherein the first end portions of each optical fibre comprise a two dimensional array of fibres.2. The apparatus of claim 1 , wherein the first end portions of each fibre are substantially parallel.3. The apparatus of claim 1 , wherein the first end portions of each fibre are oriented at different angles.4. The apparatus of claim 2 , further comprising one or more fibre support members.5. The apparatus of claim 4 , wherein the first end portions of the optical fibres are each supported by an array of “V” grooves in a fibre support member.6. The apparatus of claim 1 , ...

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Номер записи: 68
24-03-2022 дата публикации

GAS DETECTING DEVICE

Номер: US20220091009A1
Автор: Huang Yu-Chien, LIN TSENG-LUNG, YU SHAO-YUN
Принадлежит:

A gas detecting device is provided to detect characteristics of a gas under test. The gas detecting device includes a shell component, a sensing component, and a dust blocking element. The shell component includes a gas passage and a groove. The gas under test passes through a detecting area on a path of the gas passage along the gas passage. The sensing component is disposed inside the shell component. The sensing component includes a substrate, a sensor, and a laser light source. The sensor and the laser light source are respectively disposed corresponding to the detecting area. The dust blocking element is detachably disposed in the groove of the shell component. The dust blocking element includes a base and a cover. The cover is light permeable. 1. A gas detecting device detecting characteristics of a gas under test , the gas detecting device comprising:a shell component, the shell component including a gas passage and a groove, the gas under test passing through a detecting area on a path of the gas passage along the gas passage;a sensing component, the sensing component being disposed inside the shell component, the sensing component including a substrate, a sensor disposed on the substrate, and a laser light source electrically connected to the substrate, wherein the sensor and the laser light source are respectively disposed corresponding to the detecting area; anda dust blocking element, the dust blocking element being detachably disposed in the groove of the shell component, the dust blocking element including a base and a cover disposed on the base, wherein the cover is light permeable, the cover is disposed corresponding to the detecting area, and a vertical projection of the cover on the substrate and a vertical projection of the sensor on the substrate at least partially overlap with each other.2. The gas detecting device according to claim 1 , further comprising a fan component claim 1 , the fan component being disposed in the shell component claim 1 ...

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Номер записи: 69
19-03-2015 дата публикации

METHOD AND APPARATUS FOR MEASURING CHARGE AND SIZE OF SINGLE OBJECTS IN A FLUID

Номер: US20150081228A1
Автор: Krishnan Madhavi
Принадлежит: UNIVERSITAT ZURICH

In a method for determining charge and/or size of an object () suspended in a fluid, the object () is introduced, together with the fluid, into an electrostatic trap () defining an electrostatic confining potential. The thermal motion of the object () in the fluid is observed under influence of the confining potential, and charge and/or size are determined from the observed thermal motion. In particular, the viscous drag on the object yields a measure of its size, while the stiffness of its confinement can be compared with a potential model to reveal the total charge it carries. Also disclosed are an apparatus and software for carrying out the method. 118.-. (canceled)19. A method for determining at least one of charge and size of an object suspended in a fluid , the method comprising:introducing the object, together with the fluid, into an electrostatic trap defining an electrostatic confining potential (ΔU);observing thermal motion of the object in the fluid under influence of the confining potential (ΔU); anddetermining at least one of charge and size from the observed thermal motion.20. The method of claim 19 , comprising:determining at least one characteristic of the confining potential (ΔU) from the observed thermal motion; andcomparing the determined characteristic with a potential model to determine at least one of charge and size of the object.21. The method of claim 20 , wherein the characteristic of the confining potential (ΔU) is determined by measuring at least one characteristic of a probability density distribution (P(r)) of object displacement under influence of the confining potential and deriving the characteristic of the confining potential from said characteristic of the probability density distribution (P(r)).22. The method of claim 20 , wherein the characteristic of the confining potential is a stiffness parameter (k) of the confining potential (ΔU).23. The method of claim 22 , wherein determining the stiffness parameter comprises: imaging the ...

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Номер записи: 70
05-03-2020 дата публикации

Optical flow cell assembly incorporating a replaceable transparent flow cell

Номер: US20200072747A1
Автор: David Rahmlow, Matthew Greenstreet, Shiladitya Sen
Принадлежит: Wyatt Technology LLC

A new liquid flow cell assembly for light scattering measurements is disclosed which utilized a floating manifold system. The assembly operates with minimal stacked tolerances by aligning the cell to the windows within a manifold and independently aligning the cell to the read head directly. This configuration enables the ability to replace the flow cell or the flow cell/manifold assembly within a light scattering instrument without the need to realign the flow through elements with the light scattering illumination source while still maintaining reproducible, quality data. Some embodiments employ wide bore cells which enable the measurement of process analytic technology (PAT) including online monitoring of reactions.

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Номер записи: 71
18-03-2021 дата публикации

SYSTEMS AND METHODS FOR EXTENDED DYNAMIC RANGE DETECTION OF LIGHT

Номер: US20210080368A1
Автор: JR. Donald Francis, Kiesel Peter, Perrault, Sharpe Johnathan Charles
Принадлежит:

Systems and methods taught herein advantageously provide extended dynamic range capabilities to detect low intensity and high intensity emitted or scattered light from particles at high speeds with high sensitivity. Independently controlled first and second optical detector elements that handle light intensities in different dynamic ranges, large overall dynamic range is created. Signals from the detector elements can be combined to create a single combined signal that has excellent sensitivity over a large dynamic range. The detector systems and methods taught herein are particularly advantageous in particle processing where the population of particles can emit or scatter light over a large range of intensity values. Systems and methods taught herein enable a wide dynamic range, optical signals of related to particles of interest within a single detector's dynamic range can be acquired while other optical signals at light intensities outside the single detector's dynamic range can also be accurately captured. 1. A detector system with extended dynamic range , comprising:a first optical detector element having a first dynamic range that receives a first portion of light from an optical source, the first optical detector element generating a first detector output;a second optical detector element having a second dynamic range that receives a second portion of light from the optical source, the second optical detector element generating a second detector output; anda signal combiner that receives the first detector output and the second detector output and generates a combined signal having greater effective dynamic range than the first dynamic range and the second dynamic range.2. The system of claim 1 , further comprising a spectral selection element that limits the range of wavelengths in the first portion of light or the second portion of light.3. The system of claim 2 , wherein the spectral selection element is at least one of a spectral filter claim 2 , a prism ...

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Номер записи: 72
18-03-2021 дата публикации

METHOD FOR IMAGING BIOLOGICAL TISSUE USING POLARIZED MAJORANA VECTOR AND COMPLEX VORTEX PHOTONS FROM LASER AND SUPERCONTINUUM LIGHT SOURCES

Номер: US20210080382A1
Автор: ALFANO ROBERT, Mamani Sandra, Shi Lingyan
Принадлежит:

A super class of polarized transverse vector vortex photon beams patterns are mathematically represented here, which are -like among them are the radial and azimuthal Laguerre-Gaussian, hybrid π-vector beams, and Airy beams. These optical beams are consider spin-orbit coupled beams based on OAM and SAM parts of light. A photon is a photon that is identical to its anti-photon. It has within itself both chirality, right and left-handed twist in polarization (SAM) and wavefront (OAM). Applications using photons improve optical deeper imaging, higher resolution imaging, Nonlinear Optics effects (SHG, SRS, SC), optical communication in free space and fibers, quantum computer as basic qubit, and entanglement for security. 1. A method for imaging and deep imaging a biological tissue sample (ie: brain , breast) or tubid media (ie: polystyrene beads , fog) , the method comprising the steps of:{'i': Majorana', 'Majorana', 'Majorana', 'Majorana, 'transmitting photons through the biological or turbid media sample, wherein the photons are a mixed state of spin angular momentum (SAM) and orbital angular momentum (OAM) (chiral entangled state), such beams having radial polarization an azimuthal polarization, thereby producing transmitted photons; receiving the transmitted photons with an optical receiver, thereby producing a received signal; and processing the received signal to produce a digital image of the samples.'}2MajoranaMajorana. The method as recited in claim 1 , wherein and non-beams with application on multiphoton imaging using higher resolution claim 1 , obtained from a focused vector beam (small spot size) for longitudinal electric field Eusing a high numerical aperture (NA) microscope objective lens.3MajoranaMajorana. The method as recited in claim 1 , wherein and non-beams with application in deep imaging (i.e. brain claim 1 , lipids claim 1 , collagen). Mainly applications to Window III (1600-1870 nm) NIR optical brain tissue claim 1 , known as the golden window in ...

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Номер записи: 73
18-03-2021 дата публикации

PORTABLE DIFFRACTION-BASED IMAGING AND DIAGNOSTIC SYSTEMS AND METHODS

Номер: US20210080390A1
Автор: Castro Cesar, Im Hyungsoon, Lee Hakho, Weissleder Ralph
Принадлежит:

The disclosure features systems and methods for measuring and diagnosing target constituents bound to labeling particles in a sample. The systems include a radiation source, a sample holder, a detector configured to obtain one or more diffraction patterns of the sample each including information corresponding to optical properties of sample constituents, and an electronic processor configured to, for each of the one or more diffraction patterns: (a) analyze the diffraction pattern to obtain amplitude information and phase information corresponding to the sample constituents; (b) identify one or more particle-bound target sample constituents based on at least one of the amplitude information and the phase information; and (c) determine an amount of at least one of the particle-bound target sample constituents in the sample based on at least one of the amplitude information and the phase information. 1. A diagnostic system for measuring target constituents bound to labeling particles in a sample , the system comprising:a radiation source configured to generate illumination radiation;a sample holder configured to support the sample so that the sample is exposed to the illumination radiation;a detector configured to obtain one or more diffraction patterns of the sample, wherein each of the diffraction patterns comprises information corresponding to optical properties of sample constituents; and (a) analyze the diffraction pattern to obtain amplitude information and phase information corresponding to the sample constituents;', '(b) identify one or more particle-bound target sample constituents based on at least one of the amplitude information and the phase information; and', '(c) determine an amount of at least one of the particle-bound target sample constituents in the sample based on at least one of the amplitude information and the phase information., 'an electronic processor configured to, for each of the one or more diffraction patterns2. The system of claim 1 , ...

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Номер записи: 74
14-03-2019 дата публикации

PARTICLE CHARACTERISATION

Номер: US20190078990A1
Автор: CORBETT Jason
Принадлежит: Malvern Panalytical Limited

An apparatus for particle characterisation, comprising: a sample cell for holding a sample; a light source configured to illuminate the sample with an illuminating beam and a plurality of light detectors, each light detector configured to receive scattered light resulting from the interaction between the illuminating beam and the sample along a respective detector path, wherein each respective detector path is at substantially the same angle to the illuminating beam. 1. An apparatus for particle characterisation , comprising:a sample cell for holding a sample;a light source configured to illuminate the sample with an illuminating beam;a plurality of light detectors, each light detector configured to receive scattered light resulting from the interaction between the illuminating beam and the sample along a respective detector path, wherein each respective detector path is at substantially the same angle to the illuminating beam.2. The apparatus of claim 1 , further comprising:a plurality of optical fibres, each optical fibre corresponding with a light detector and arranged to couple light from the respective detector path to the corresponding light detector.3. The apparatus of claim 2 , wherein each optical fibre is arranged to receive the scattered light from the detector path at a first end portion; andwherein the first end portions of each fibre are substantially parallel.4. The apparatus of claim 3 , wherein the first end portions of each optical fibre comprise a one dimensional array of fibres.5. The apparatus of claim 3 , wherein the first end portions of each optical fibre comprise a two dimensional array of fibres.6. The apparatus of claim 2 , wherein each optical fibre is arranged to receive the scattered light from the detector path at a first end portion; andwherein the first end portions of each fibre are oriented at different angles.7. The apparatus of claim 3 , further comprising one or more fibre support members.8. The apparatus of claim 6 , wherein ...

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Номер записи: 75
12-03-2020 дата публикации

FLUID EVALUATION APPARATUS AND METHOD, COMPUTER PROGRAM, AND RECORDING MEDIUM

Номер: US20200077934A1
Автор: Adachi Genki, AGATA Akari, ITO Atsuya, Murakami Tomoya, ONODERA Wataru, TATEISHI Kiyoshi
Принадлежит:

This fluid evaluation device is provided with an irradiation unit for irradiating a fluid with light, a light reception unit for receiving scattered light from the fluid and outputting a light reception signal, and an estimation unit for estimating at least one from among flow rate and density by mapping input points, which are on a first plane defined by flow rate and frequency and are expressed by light amount information indicating the amount of scattered light included in the light reception signal and frequency information indicating a frequency for a beat signal resulting from the Doppler shifting of the light included in the light reception signal, onto a second plane defined by fluid flow rate and fluid density. 18-. (canceled)9. A fluid evaluation apparatus comprising:an irradiator configured to irradiate a fluid with light;a light receiver configured to receive scattered light from the fluid and configured to output a light receiving signal; andan estimator configured to map an input point that is on a first plane defined by a light amount and a frequency, on a second plane defined by a flow volume of the fluid and a concentration of the fluid, thereby estimating at least one of the flow volume and the concentration, wherein the light amount and the frequency are respectively indicated by light amount information, which indicates the light amount of the scattered light included in the light receiving signal, and by frequency information, which indicates the frequency associated with a beat signal caused by a Doppler shift of the light included in the light receiving signal.10. The fluid evaluation apparatus according to claim 9 , whereinsaid estimatorhas lattice point information associated with a plurality of lattice points each of which has a known correspondence between a position indicated by the light amount and the frequency on the first plane and a position indicated by the flow volume and the concentration on the second plane, andis configured to ...

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Номер записи: 76
23-03-2017 дата публикации

System for flat-top intensity laser sheet beam generation

Номер: US20170082861A1
Автор: Shengbo Xu, Tolga Acikalin
Принадлежит: Intel Corp

Systems and techniques are disclosed for flat-top intensity laser sheet beam generation. The system includes a source of light directed at a first optical component arranged to receive the light and generate spherical aberration (e.g., third order positive aberration) in the light rays. The spherical aberration results in positive aberrations in the light in a first plane and also results in the light being substantially collimated in a second plane perpendicular to the first plane. In some cases, the source of light is provided from a laser diode and the first optical component is one of an aspherical lens and a spherical lens. The system also includes a second optical component for focusing the light in the second plane. In some cases, the second optical component is a cylindrical lens.

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Номер записи: 77
31-03-2022 дата публикации

METHOD AND APPARATUS FOR DETECTION OF PARTICLE SIZE IN A FLUID

Номер: US20220099546A1
Автор: Ghosh Avishek, VAEZ-IRAVANI Mehdi
Принадлежит:

Examples disclosed herein relate to system and method for detecting the size of a particle in a fluid. The system includes a conduit for transporting a fluid and a sample area. Some of the fluid passes through the sample area. A first imaging device has an optical lens and a digital detector. A laser source emits a first laser beam. The digital detector generates a metric of an initial intensity of a scattered light that passes through the optical lens. The scattered light is scattered from particles passing through the sample area, and includes light from the first laser beam, which passes through the sample area. A controller outputs a corrected particle intensity based upon a comparison of the initial intensity to data representative of intensity of a focused and defocused particle. The corrected particle intensity generates a corrected metric corresponding to an actual size of the particles. 1. A system for detecting particles , comprising:a conduit configured to transport a fluid;a sample area defined within the conduit, wherein at least a portion of the fluid passes through the sample area at a given velocity;{'claim-text': ['an optical lens; and', 'a digital detector;'], '#text': 'a first imaging device comprising:'}a laser source configured to emit a first laser beam, the digital detector configured to generate a metric of an initial intensity of a scattered light that passes through the optical lens, the scattered light is scattered from one or more particles passing through the sample area, the scattered light comprising light from the first laser beam, wherein the first laser beam is directed to pass through the sample area by the first imaging device; anda controller configured to output a corrected particle intensity based upon a comparison of the initial intensity obtained from the digital detector to data representative of intensity of a focused particle and intensity of a defocused particle, wherein the corrected particle intensity generates a ...

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Номер записи: 78
31-03-2022 дата публикации

Particle detection sensor and particle detector

Номер: US20220099554A1
Автор: Daiki NARUSE, Hirokazu SASABE, Mitsutoshi Okami, Noboru Takeuchi, Toshiya Fujiyama, Yoshifumi Masuda
Принадлежит: Sharp Semiconductor Innovation Corp

A detection mechanism includes a light source disposed on a substrate, a condensing lens disposed between the substrate and light emitted from the light source, and a photodetector disposed on the substrate and under the condensing lens.

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Номер записи: 79
31-03-2016 дата публикации

Particle counter for chemical solution

Номер: US20160091407A1
Автор: Masaki SHIMMURA, Takashi Minakami, Tomonobu Matsuda
Принадлежит: Rion Co Ltd

A particle counter for chemical solution in this disclosure uses a flow cell through which a chemical solution including particles flows, a laser light, and a light-receiving element array. Scattered light from the particles passing through a detection region on an optical path of the laser light in the flow cell is condensed to the light-receiving element array. The laser light in the center of the detection region has an energy density of 3×10 8 mW/cm 2 or more. Each of plural light-receiving elements (a) is larger in length and width than a spot diameter of the scattered light, and (b) receives the scattered light from a region with a size of 760 μm 2 or less included in the detection region. The signal processing unit counts the particles passing through the detection region by use of a threshold corresponding to the smallest measurable particle size of 0.03 μm.

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Номер записи: 80
29-03-2018 дата публикации

APPARATUS AND METHOD FOR LASER PARTICLE SENSOR EYE SAFETY

Номер: US20180088045A1
Автор: Fan Xiao Zhu, Garde Jason, Kimmel Danny Thomas, Lodden Grant
Принадлежит:

In one embodiment, a particle sensor on or in a vehicle is provided. The laser particle sensor comprises an optical system; a processing system coupled to the optical system; wherein the optical system is configured to transmit one or more laser light beams to detect particles in a volume of freestream fluid, and to have the one or more light beams terminate on a portion of the vehicle on which the optical system is mounted; and wherein the optical system is configured to receive a backscattered portion of the one or more laser light beams transmitted by the optical system. 1. A laser particle sensor on a vehicle , comprising:an optical system;a processing system coupled to the optical system;one or more measurement systems coupled to the processing system;wherein the optical system is configured to transmit one or more laser light beams in normal power mode when each of such one or more laser light beams are directed away approximately parallel to a vertical axis of a body of the vehicle, on which the laser particle sensor is mounted, and away from terrain about which the vehicle travels; andwherein the optical system is configured to receive a backscattered portion of the one or more laser light beams transmitted by the optical system.2. The laser particle sensor of claim 1 , wherein the optical system comprises an optical transceiver; andwherein the optical transceiver is configured to transmit one or more laser light beams in at least a normal power mode and a low power mode.3. The laser particle sensor of claim 1 , wherein the optical system comprises optics; andwherein the optics directs transmitted and backscattered light respectively from and to the optical transceiver.4. The laser particle sensor of claim 1 , further comprising a window; andwherein the one or more laser light beams pass through the window.5. The laser particle sensor of claim 1 , where the one or more measurement systems include at least one of an altimeter system claim 1 , a speed and ...

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Номер записи: 81
21-03-2019 дата публикации

Method and apparatus of ultrafast particle dynamics measurement based on photon ensemble correlation spectroscopy

Номер: US20190086314A1
Автор: Li Pei, Li Peng
Принадлежит:

An apparatus of ultrafast particle dynamics measurement based on photon ensemble correlation spectroscopy include steps of: dispersing a particle sample to be detected; establishing a plurality of sampling volumes, and collecting dynamic scattered light signals in parallel; and constructing sample ensembles based on scattered signals of the sampling volumes, analyzing time correlations between the sample ensembles, and detecting particle dynamic characteristics. A period for a single measurement of particles according to the method can be in the range of several milliseconds to several tens of milliseconds, which is conducive to real-time detection. More accurate and reliable correlation characterization can be obtained by combining the detected complex-valued scattered signals with both amplitude and phase information. Furthermore, the particle detection is able to be spatially resolved, so as to achieve spatially resolved particle dynamic characteristics. 1. A method of ultrafast particle dynamics measurement based on photon ensemble correlation spectroscopy , comprising steps of:dispersing a particle sample to be detected;establishing a plurality of sampling volumes, and collecting dynamic scattered light signals in parallel; andconstructing sample ensembles based on scattered signals of the sampling volumes, analyzing time correlations between the sample ensembles, and detecting particle dynamic characteristics.2. The method of the ultrafast particle dynamics measurement based on the photon ensemble correlation spectroscopy claim 1 , as recited in claim 1 , wherein dispersing the particle sample to be detected specifically comprises a step of dispersing a liquid particle sample to be detected with a wet method or dispersing a gas particle sample to be detected with a dry method.3. The method of the ultrafast particle dynamics measurement based on the photon ensemble correlation spectroscopy claim 1 , as recited in claim 1 , wherein establishing the sampling ...

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Номер записи: 82
21-03-2019 дата публикации

Method for Measuring the Properties of Particles in a Medium and a Device for Measuring the Properties of Particles in a Flue Gas

Номер: US20190086315A1
Автор: Plöckl Manfred
Принадлежит:

The invention relates to a method for determining properties of particles in a medium by measuring scattering of a light ray guided through the medium. The light ray () can be led through a scattering zone () more than once. Both the scattered () and unscattered light are measured using the same sensor (). The invention also relates to a measuring device for measuring the properties of particles in a medium, such as flue gas. 1. A method for measuring properties of particles contained in a medium on the basis of scattering of a light ray travelling through the medium in a scattering zone , comprising:guiding the light ray through the scattering zone more than once, whereby a portion of light is scattered.measuring both the scattered light and the unscattered light using the same sensor.2. The method according to claim 1 , wherein in the medium is a flue gas.3. The method according to claim 1 , wherein by guiding the light ray through the scattering zone claim 1 , a portion of light is scattered from particles contained in the medium claim 1 , the method further comprising the steps of:guiding part of the scattered light scattered to a chosen angle, to the sensor, andguiding the unscattered light ray having travelled through the medium along a straight line again, in particular using mirrors, through the scattering zone to the sensor.4. The method according to claim 3 , wherein the intensity of unscattered light is reduced for example in connection with mirrors or using filters or dimmers.5. The method according to claim 1 , comprisingguiding the light ray from a light source to the scattering zone and further to the sensor through light openings,blowing clean gas past the light openings, in particular as laminar flow, in order to prevent contamination of optical elements used in the method6. The method according to claim 5 , wherein the medium claim 5 , in particular flue gas claim 5 , is heated before feeding to the scattering zone.7. The method according to claim ...

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Номер записи: 83
21-03-2019 дата публикации

SYSTEM FOR BLOOD FLOW MEASUREMENT WITH AFFIXED LASER SPECKLE CONTRAST ANALYSIS

Номер: US20190086316A1
Автор: Rice Tyler Bywaters, White Sean Michael, Yang Bruce Yee
Принадлежит:

Devices, systems, and methods are disclosed for improved laser speckle imaging of samples, such as vascularized tissue, for the determination of the rate of movement of light scattering particles within the sample. The system includes a structure adjoining a light source and a photo-sensitive detector. The structure can be positioned adjacent the sample (e.g., coupled to the sample) and configured to orient the light source and detector relative the sample such that surface reflections, including specular reflections and diffuse reflections, are discouraged from entering the detection field of the detector. The separation distance along the structure between the light source and the detector may further enable selective depth penetration into the sample and biased sampling of multiply scattered photons. The system includes an operably coupled processor programmed to derive contrast metrics from the detector and to relate the contrast metrics to a rate of movement of the light scattering particles. 1. A system for determining the rate of movement of a plurality of light scattering particles within a sample , the system comprising:a light source configured to emit at least partially coherent light toward the plurality of light scattering particles;a photo-sensitive detector comprising one or more pixels and configured to detect light scattered off of at least some of the plurality of light scattering particles;a structure adjoining the light source and the detector for operatively positioning the light source and the detector adjacent the sample, wherein the structure is configured to position the light source and the detector relative to one another and the sample such that surface reflections from the sample are not detected by the detector and such that at least some of the emitted light scattered off of at least some of the plurality of light scattering particles is detected by the detector; and derive a metric of contrast by comparing in time and/or space the ...

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Номер записи: 84
05-05-2022 дата публикации

METHOD OF EVALUATING AND OPTIONALLY SELECTING A SUITABLE CHEMISTRY FOR REMOVAL OF MICROPLASTICS IN A LIQUID MATRIX

Номер: US20220135451A1
Автор: GRÖNFORS Outi, Hesampour Mehrdad, Lindberg Lenita, RAJALA Katriina
Принадлежит:

The present invention relates to a method of evaluating and optionally selecting a suitable chemistry for removal of microplastics in a liquid matrix, said method comprising using at least one coagulant and/or flocculant and measuring fluorescence intensity and light scattering intensity of any particles in a sample volume of clarified liquid matrix by an optical measurement.

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Номер записи: 85
05-05-2022 дата публикации

LASER PARTICLE SIZE ANALYZER WITH LIQUID SHEATH FLOW MEASURING CELL

Номер: US20220136955A1
Автор: ZHANG Fugen
Принадлежит:

A laser particle size analyzer with a liquid sheath flow measuring cell comprises a measuring cell which comprises a particle flow leading-in cavity (), a medium flow leading-in cavity () and a measuring glass cavity (), wherein the medium flow leading-in cavity () is connected to an upper portion of the measuring glass cavity (); the medium flow leading-in cavity () is annularly arranged at a periphery of the particle flow leading-in cavity (), and a gap () is formed between the medium flow leading-in cavity () and the particle flow leading-in cavity (); a medium flow () flows into the measuring glass cavity () from the gap (), and a particle flow () flows into the measuring glass cavity () from the particle flow leading-in cavity (). The laser particle size analyzer achieves technical effects of long service life, simple operation and good use effect of the measuring cell.

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Номер записи: 86
01-04-2021 дата публикации

PARTICLE DETECTING MODULE

Номер: US20210096052A1
Автор: CHEN Chih-Kai, Han Yung-Lung, Huang Chi-Feng, LIN Ching-Sung, Mou Hao-Jan, Tsai Chang-Yen, Wu Chin-Chuan
Принадлежит: Microjet Technology Co., Ltd.

A particle detecting module is provided. The particle detecting module includes a base, a piezoelectric actuator, a driving circuit board, a laser component, a particulate sensor and an outer cover. A gas-guiding-component loading regain and a laser loading region are separated by the base. By the design of the gas flowing path, the driving circuit board covering the bottom surface of the base, and the outer cover covering the surfaces of the base, an inlet path is defined by the gas inlet groove of the base, and an outlet path is defined by a gas outlet groove of the base. Consequently, the thickness of the particle detecting module is drastically reduced. 1. A particle detecting module , comprising: a first surface;', 'a second surface opposite to the first surface;', 'a laser loading region hollowed out from the first surface to the second surface;', 'a gas-inlet groove concavely formed from the second surface and disposed adjacent to the laser loading region, wherein the gas-inlet groove comprises a gas-inlet and two lateral walls, the gas-inlet is in communication with an environment outside the base, and a transparent window is opened on the lateral wall and is in communication to the laser loading region;, 'a base comprising 'a gas-outlet groove concavely formed from the first surface, spatially corresponding to the bottom surface of the gas-guiding-component loading region, and hollowed out from the first surface to the second surface in a region where the first surface is not aligned with the gas-guiding-component loading region, wherein the gas-outlet groove is in communication with the ventilation hole, and a gas-outlet is disposed in the gas-outlet groove and in communication with the environment outside the base;', 'a gas-guiding-component loading region concavely formed from the second surface and in communication with the gas-inlet groove, wherein a ventilation hole penetrates a bottom surface of the gas-guiding-component loading region; and'}a ...

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Номер записи: 87
12-05-2022 дата публикации

APPARATUS AND METHODS FOR PARTICLE TESTING

Номер: US20220146394A1
Автор: RUSSELL Philip, Sharma Abhinav, XIE Shangran, ZELTNER Richard
Принадлежит:

A particle testing apparatus, being configured for investigating particles in a fluid medium, includes a waveguide device having a hollow optical waveguide with an input end and an output end, an irradiation device including a laser source being arranged for optically trapping at least one particle at the input end of the optical waveguide and propelling the particle through the optical waveguide toward the output end thereof, and a measuring device being arranged for sensing the at least one particle in the optical waveguide, wherein the measuring device is arranged for measuring an optical transmission of the optical waveguide. Furthermore, a particle testing apparatus is described. 115-. (canceled)16. Particle testing apparatus , being configured for investigating particles in a fluid medium , comprising:a waveguide device including a hollow optical waveguide having an input end and an output end,an irradiation device including a laser source being arranged for optically trapping at least one particle at the input end of the optical waveguide and propelling the particle through the optical waveguide toward the output end thereof, anda measuring device being arranged for sensing the at least one particle in the optical waveguide, whereinthe measuring device is arranged for measuring an optical transmission of the optical waveguide along a longitudinal extension thereof.17. Particle testing apparatus according to claim 16 , further comprisingan analysing device being coupled with the measuring device and being arranged for providing at least one particle feature, andthe analysing device is adapted for providing the at least one particle feature based on the optical transmission.18. Particle testing apparatus according to claim 17 , comprising at least one of the featuresthe analysing device is adapted for providing at least one of a particle number, a particle size, a particle mass and a particle refractive index as the at least one particle feature, andthe ...

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Номер записи: 88
28-03-2019 дата публикации

MOBILE TERMINAL AND OPERATION METHOD OF THE SAME

Номер: US20190094140A1
Автор: HAN Dongsu, JIN Soseul, KIM Jungwhan, LEE Yoonwoo
Принадлежит: LG ELECTRONICS INC.

A mobile terminal and an operation method thereof are disclosed. A mobile terminal according to an embodiment of the present disclosure may include a display; a front window disposed at a front of the mobile terminal; an inner frame formed with a hole configured to allow light to pass through from the front window; and a dust sensor comprising a light emitting portion and a light receiving portion, wherein the light emitting portion is disposed adjacent to the inner frame and configured to emit light through the hole, and wherein the light receiving portion is configured to generate a signal based on light sensed through the hole that is emitted by the light emitting portion and scattered by dust particles. 1. A mobile terminal , comprising:a display;a front window disposed at a front of the mobile terminal;an inner frame formed with a hole configured to allow light to pass through from the front window; anda dust sensor comprising a light emitting portion and a light receiving portion,wherein the light emitting portion is disposed adjacent to the inner frame and configured to emit light through the hole, andwherein the light receiving portion is configured to generate a signal based on light sensed through the hole that is emitted by the light emitting portion and scattered by dust particles.2. The mobile terminal of claim 1 , further comprising a controller configured to:control a light emission period of the light emitting portion and detect dust particles using the generated signal; anddetermine a size, number, and movement speed of the dust particles based on the generated signal.3. The mobile terminal of claim 1 , wherein the dust sensor is disposed at a position corresponding to a light path formed at an upper end of the front window and the inner frame claim 1 , and the light emitting portion emits the light in a straight line through along the light path through the front window and the inner frame.4. The mobile terminal of claim 2 , wherein the controller ...

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Номер записи: 89
12-04-2018 дата публикации

HYDROXYALKYL ALKYL CELLULOSE, METHOD FOR PRODUCING THE SAME, AND SOLID PREPARATION

Номер: US20180100028A1
Автор: Hirama Yasuyuki, KITAGUCHI Taishi, KITAMURA Akira, YOKOSAWA Takuya
Принадлежит: SHIN-ETSU CHEMICAL CO., LTD.

There is provided is a hydroxyalkyl alkyl cellulose exhibiting good flowability and high compressibility. More specifically, provided are a hydroxyalkyl alkyl cellulose having a volume-based average particle diameter, determined by dry laser diffractometry, of 50 to 100 μm, and having, on a basis of a dynamic image analysis to divide all particles into fine particles, spherical particles and fibrous particles, a volume fraction of the fibrous particles consisting of long and short fibrous particles relative to all of the particles of 45 to 70%, and a volume fraction of the fine particles relative to all of the particles of less than 2.0%; a solid preparation including the hydroxyalkyl alkyl cellulose; and others. 1. A hydroxyalkyl alkyl cellulose comprising:a volume-based average particle diameter, determined by dry laser diffractometry, of 50 to 100 μm, and having, on a basis of a dynamic image analysis to divide all particles into fine particles, spherical particles and fibrous particles, a volume fraction of the fibrous particles consisting of long and short fibrous particles relative to all of the particles of 45 to 70%, and a volume fraction of the fine particles relative to all of the particles of less than 2.0%, whereinthe fine particles have a length of fiber of less than 40 μm,{'sub': EQPC', 'real, 'the spherical particles have a length of fiber of 40 μm or more and consist of first and second spherical particles, wherein the first spherical particles have an elongation, which is a ratio of a diameter of fiber to a length of fiber, of 0.5 or more, and the second spherical particles have an elongation of less than 0.5, an aspect ratio, which is a ratio of a maximal Feret diameter to a minimal Feret diameter, of 0.5 or more, and a circularity, which is a ratio of a perimeter (P) of a circle that has the same area as a projection area to a perimeter (P) of a real particle, of 0.7 or more,'}the long fibrous particles have a length of fiber of 200 μm or more and ...

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Номер записи: 90
23-04-2015 дата публикации

Optimized detector readout for biosensor

Номер: US20150110371A1
Автор: Bart Michiels, Josephus Arnoldus Henricus Maria Kahlman
Принадлежит: Koninklijke Philips NV

The present invention provides a biosensor system comprising a light source, a cartridge adapted to be illuminated by said light source, a light detector adapted for detecting a signal originating from the cartridge, an illumination control means adapted to vary the illumination of the cartridge between at least two different states, a means for generating a first oscillation with a first frequency, and a means for generating a second oscillation with a second frequency, wherein the frame rate of the light detector is triggered by the first oscillation and the illumination control means is triggered by the second oscillation.

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Номер записи: 91
02-06-2022 дата публикации

Glittery ink and image forming device

Номер: US20220169879A1
Автор: Juichi Furukawa
Принадлежит: Ricoh Co Ltd

A glittery ink contains glittery pigment particles, resin particles, and an organic solvent, wherein the following relationships are satisfied: a≤c≤b and a<b, where a represents the particle diameter of the resin particles corresponding to the minimum of two or more peaks in a particle size distribution as measured by a dynamic light scattering particle size distribution measuring device, b represents the particle diameter of the resin particles corresponding to the maximum of the two or more peaks in the particle size distribution, and c represents the particle diameter of the glittery pigment corresponding to a maximum number of particles in a particle size distribution as measured by the dynamic light scattering particle size distribution measuring device.

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Номер записи: 92
02-06-2022 дата публикации

OPTICAL PARTICULATE DETECTION FOR AN AIRCRAFT

Номер: US20220170837A1
Автор: Gavrilovski Alek, Gorski Michael T., Lincoln David L., Wang Xuemei
Принадлежит:

An optical particulate detection system for an aircraft is provided. The optical particulate detection system includes an optical particulate detector and a controller. The optical particulate detector includes at least two optical sources and at least one optical sensor distributed in series with respect to a flow path of a component surface of the aircraft. The controller is configured to interface with the optical particulate detector, monitor the at least one optical sensor, and characterize one or more particles of foreign object debris based on a pulse width and two or more scattering ratios determined with respect to light emitted from the at least two optical sources. 1. An optical particulate detection system for an aircraft , the optical particulate detection system comprising:an optical particulate detector comprising at least two optical sources and at least one optical sensor distributed in series with respect to a flow path of a component surface of the aircraft; and interface with the optical particulate detector;', 'monitor the at least one optical sensor; and', 'characterize one or more particles of foreign object debris based on a pulse width and two or more scattering ratios determined with respect to light emitted from the at least two optical sources., 'a controller configured to2. The optical particulate detection system of claim 1 , wherein the controller is configured to:receive a plurality of optical sensor data from the optical particulate detector;determine whether the optical sensor data exceeds a foreign object debris threshold;determine the pulse width and two or more scattering ratios based on determining that the optical sensor data exceeds the foreign object debris threshold;characterize the one or more particles of foreign object debris detected in the optical sensor data; andoutput a foreign object debris size and type based on characterizing the one or more particles of foreign object debris.3. The optical particulate detection ...

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Номер записи: 93
19-04-2018 дата публикации

PARTICLE SIZE DETERMINATION USING RAMAN SPECTROSCOPY

Номер: US20180106712A1
Автор: Owen Harry
Принадлежит:

The present disclosure is directed to a method of particle size determination for particles suspended within a light-transmissive medium. The method includes directing a monochromatic light source into the medium and collecting from the medium a Raman-scattered light spectrum. The method includes analyzing the Raman spectrum to determine an amount of Tyndall scattering of the Raman spectrum caused by particles within the medium, and thus determine the size and the number of particles mediating the Tyndall scattering. 1. A method for determining the size of particles dispersed in a light-transmissive medium , comprising:directing an excitation light into the medium, wherein the excitation light is monochromatic;collecting from the medium a first Raman spectrum using a Raman spectrometer;analyzing the first Raman spectrum to determine a composition of the medium;computing a first ratio of red light in the first Raman spectrum to blue light in the first Raman spectrum;waiting a pre-determined period of time;after the pre-determined period, directing the excitation light into the medium and collecting from the medium a second Raman spectrum using the Raman spectrometer;computing a second ratio of red light in the second Raman spectrum to blue light in the second Raman spectrum;comparing the second ratio to the first ratio; anddetermining the size and a count of particles dispersed in the medium based on the comparison of the second ratio to the first ratio.2. The method of claim 1 , wherein the excitation light is a laser operating at 532 nanometers (nm) claim 1 , 785 nm claim 1 , or 933 nm.3. The method of claim 1 , wherein the red light in the first Raman spectrum and the red light in the second Raman spectrum have a first wavenumber range claim 1 , and wherein the blue light in the first Raman spectrum and the blue light in the second Raman spectrum have a second wavenumber range claim 1 ,wherein the first wavelength range has greater wavenumbers than the second ...

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Номер записи: 94
20-04-2017 дата публикации

X-ray fluorescence spectrometer and x-ray fluorescence analyzing method

Номер: US20170108424A1
Автор: Takashi Yamada, Yuichiro Shimizu
Принадлежит: Rigaku Corp

An X-ray fluorescence spectrometer includes: an X-ray source ( 3 ) to irradiate, with primary X-rays ( 6 ), a sample ( 1 ) that is multiple nanoparticles placed on a substrate ( 10 ); an irradiation angle adjustment unit ( 5 ) to adjust an irradiation angle at which a surface ( 10 a ) of the substrate is irradiated; a detection unit ( 8 ) to measure an intensity of fluorescent X-rays ( 7 ) from the sample ( 1 ); a peak position calculation unit ( 11 ) to generate a sample profile representing change of the intensity of the fluorescent X-rays ( 7 ) against change of the irradiation angle, and to calculate a peak irradiation angle position; a particle diameter calibration curve generation unit ( 21 ) to generate a calibration curve; and a particle diameter calculation unit ( 22 ) to calculate a particle diameter of nanoparticles of an unknown sample ( 1 ) by applying the peak irradiation angle position of the unknown sample ( 1 ) to the calibration curve.

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Номер записи: 95
19-04-2018 дата публикации

Systems, Processes, Methods and Machines for Transforming Image Data Into Sizing and Volume Measurements for Tissue

Номер: US20180108130A1
Автор: McCord Roy
Принадлежит: Prodo Laboratories

Automated islet measurement systems (AIMS) in combination with tissue volume analysis (TVA) software effectively gauges volumetric and size-based data to generate heretofore unavailable information regarding, for example, populations of islet cells, stem cells and related desiderata. 19-. (canceled)10. A method of measuring the volume of a cell with a natural , undeformed by a mechanical force , shape comprising the steps of:identifying a cell in a flask, wherein opposing surfaces of the flask do not deform the cell;visualizing the cell in the flask through a lens of a non-phase contrast microscope connected to a monochrome charge-coupled device camera;illuminating the cell with a trans-illumination means, which exceeds deep field image size by a factor of at least two; evaluating a cross-section size of the cell;', 'measuring an optical transmission at each pixel within the cell;', 'calculating a volume of tissue at each pixel; and', 'calculating a total volume for the cell with an automated cell measurement system, comprising tissue volume analysis software., 'imaging the cell with the camera, wherein the cell has a natural, undeformed by a mechanical force, shape; the image comprising pixels;'}11. The method of claim 10 , wherein the cell is a pancreatic cell.12. The method of claim 10 , wherein the cell is an islet.13. The method of claim 10 , wherein the cell is a stem cell.14. The method of claim 10 , wherein the cell is a sphere of stem cells.15. The method of claim 10 , wherein the flask is a culture flask.16. The method of claim 15 , wherein the culture flask is a horizontal culture flask. This application claims the full Paris Convention benefit to and priority of U.S. Provisional Application Ser. No. 61/720,153, filed Oct. 30, 2012, the contents of which are incorporated by this reference as if fully set forth herein in their entirety.Various tissue elements and other biological matter require precise data to support characterization, culturing and ...

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Номер записи: 96
30-04-2015 дата публикации

APPARATUS FOR MEASURING PARTICLE SIZE DISTRIBUTION BY LIGHT SCATTERING

Номер: US20150116708A1
Автор: Spriggs David
Принадлежит:

Apparatus for determining particle-size distribution of a sample by light-scattering includes a helium neon laser (), a sample cell having cell windows () and a focal plane detector (). Detectors are also provided for detecting light scattered by a sample within or flowing through the sample cell. The apparatus includes a first () and second () folding mirrors arranged to fold the optical path from the laser to the sample cell so that the laser is vertically below the sample cell. The folding mirrors are mounted within a dust-proof housing (), the entrance () and exit () components thereof being other optical components generally used within light- scattering apparatus. The entrance component is mounted such that its outward normal points downwards and the exit component is mounted substantially vertically so that these components do not accumulate dust. The invention allows the laser of a light-scattering apparatus to be positioned vertically below a sample cell of the apparatus without the accumulation of dust on optical components, which tends to degrade performance. 1. Apparatus for measuring the particle-size distribution of a sample by light scattering , the apparatus comprising a light source arranged to provide an output beam along an optical path to a sample cell , or means for holding a sample cell , the optical path being folded at a first folding mirror having mirror normal in a direction which has a component in an upward direction when the apparatus is its normal operating orientation , and wherein the first folding mirror is contained within a dust-proof housing having an optical entrance and exit optical components the outward normals of which are either substantially horizontal or have a component in a downward direction when the apparatus is in its normal operating orientation.2. Apparatus according to claim 1 , wherein the light source is mounted in an adjustable mount claim 1 , the adjustable mount being configured to allow adjustment of at least ...

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Номер записи: 97
30-04-2015 дата публикации

Particle Detector and Method for Producing Such a Detector

Номер: US20150116710A1
Автор: Nicoletti Sergio
Принадлежит:

The invention relates to a particle detector including a substrate made of a semiconductor material, in which at least one through-cavity is formed, defined by an input section and an output section, wherein the input section thereof is to be connected to an airflow source, the substrate supporting: an optical means including at least one laser source, and at least one waveguide connected to the at least one laser source and leading into the vicinity of the output section of the cavity; and a photodetector located near the output section of the cavity and offset relative to the optical axis of the optical means. 1. A particle detector comprising a substrate in which at least one through-cavity , delimited by an entry cross section and an exit cross section , is formed , the entry cross section being configured to be connected to a source of an air flow , said substrate supporting:optical device comprising at least one laser source and at least one waveguide, which is connected to said at least one laser source and the end of which is located in proximity to the exit cross section of said cavity, andat least one photodetector located in proximity to the exit cross section of said cavity and offset with respect to the optical axis of said optical means, in order to detect the scattered light.2. The particle detector as claimed in claim 1 , wherein the optical device and the photodetector are located on the same face of the substrate.3. The particle detector as claimed in claim 1 , wherein said at least one cavity has a variable cross section which decreases from the entry cross section to the exit cross section.4. The particle detector as claimed in claim 1 , wherein the optical device includes at least one photonic device claim 1 , at the opposite end of the waveguide from the laser source.5. The particle detector as claimed in claim 1 , wherein the particle detector comprises a plurality of photodetectors associated with the through-cavity.6. The particle detector ...

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Номер записи: 98
02-04-2020 дата публикации

Forward scatter sensor

Номер: US20200103329A1
Автор: Jan LÖNNQVIST, Seppo MÄKINEN
Принадлежит: Vaisala Oy

An example forward scatter sensor comprises: a transmitter to emit a light sheet; a receiver to observe light scattered from particles that fall through a measurement volume; and a control entity comprising an analyzer to record a measurement signal descriptive of intensity of light captured by the receiver as a function of time and to: carry out a precipitation analysis on basis of a time segment of the measurement signal; carry out a verification of analysis performance based on magnitudes of first peaks of at least one identified double peak and on respective residence times for said at least one identified double peak; and invoke a predefined maintenance action responsive to said verification indicating a threshold-exceeding difference between respective size estimates derived based on magnitudes of the first peak of said at least one identified double peak and based on residence times of said at least one identified double peak.

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Номер записи: 99
11-04-2019 дата публикации

APPARATUS AND METHOD FOR INCREASING DYNAMIC RANGE OF A PARTICLE SENSOR

Номер: US20190107496A1
Автор: Fan Xiao Zhu, Garde Jason, Wiebold Matthew, Wienkes Lee R.
Принадлежит:

A particle detection system is provided. The particle detection system comprises at least one transmitter; at least one receiver; a first interrogation volume formed by a first intersection of a first pair of a transmitter beam of a transmitter and a receiver field of view of a receiver; and a second interrogation volume formed by a second intersection of a second pair of a transmitter beam of a transmitter and a receiver field of view of a receiver. 1. A particle detection system , comprising:at least one transmitter;at least one receiver;a first interrogation volume formed by a first intersection of a first pair of a transmitter beam of a transmitter and a receiver field of view of a receiver; anda second interrogation volume formed by a second intersection of a second pair of a transmitter beam of a transmitter and a receiver field of view of a receiver.2. The particle detection system of claim 1 , wherein the at least one receiver is configured to:detect a presence of a first particle of a first particle size in the first interrogation volume; anddetect presence of a second particle of a second particle size in the second interrogation volume.3. The particle detection system of claim 2 , wherein detect the presence of the first particle comprises detect at least one of (a) an intensity of scattered light and (b) a relative polarization of the scattered light; andwhere detect the presence of the second particle comprises detect at least one of (a) an intensity of scattered light and (b) a relative polarization of the scattered light.4. The particle detection system of claim 1 , wherein the at least one receiver comprises an optical receiver comprising:a slit;collection optics which collects light through the receiver field of view and focuses it upon the slit; andan optical detection system which receives light from the slit.5. The particle detection system of claim 1 , wherein the at least one transmitter consists of a transmitter;wherein the transmitter beam of ...

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Номер записи: 100