ГОЛЬМИЕВЫЙ ЛАЗЕР ДЛЯ НАКАЧКИ ПАРАМЕТРИЧЕСКОГО ГЕНЕРАТОРА СВЕТА

FIELD: laser engineering. SUBSTANCE: in holmium laser for parametric light generator pumping including pumping source and arranged in optical resonator two-pass active element, Q-switch, made from material with crystalline structure, new feature is, that Q-switch combines functions of polarizer and spectral selector and represents acoustooptical filter based on paratellurite crystal, with shape, providing alignment of diffracted beam axis at crystal output with optical resonator axis. EFFECT: technical result is higher efficiency of parametric light generator pumping and accuracy of spectral analyses, as well as laser simplified optical circuit and reduced power consumption. 1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 603 336 C1 (51) МПК H01S 3/117 (2006.01) G02F 1/11 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2015132127/28, 31.07.2015 (24) Дата начала отсчета срока действия патента: 31.07.2015 (45) Опубликовано: 27.11.2016 Бюл. № 33 C 1 2 6 0 3 3 3 6 Адрес для переписки: 607188, Нижегородская обл., г. Саров, пр. Мира, 37, ФГУП "РФЯЦ-ВНИИЭФ", зам. начальника службы по инновациям и инвестициям начальнику управления В.Е. Миронову (54) ГОЛЬМИЕВЫЙ ЛАЗЕР ДЛЯ НАКАЧКИ ПАРАМЕТРИЧЕСКОГО ГЕНЕРАТОРА СВЕТА (57) Реферат: В гольмиевом лазере для накачки парателлурита, с формой, обеспечивающей параметрического генератора света, включающем совпадение оси дифрагированного луча на выходе источник накачки и размещенные в кристалла с осью оптического резонатора. двухпроходном оптическом резонаторе активный Техническим результатом изобретения является элемент, модулятор добротности, выполненный повышение эффективности накачки из материала с кристаллической структурой, параметрического генератора света и точности новым является то, что модулятор добротности спектральных исследований, а также упрощается совмещает в себе функции поляризатора и оптическая схема и уменьшается спектрального селектора и ...

GERÄT ZUR ERZEUGUNG ORTHOGONAL POLARISIERTER STRAHLEN MIT VERSCHIEDENEN FREQUENZEN

APPARAT ZUR UMWANDLUNG EINES MONOFREQUENTEN, LINEAR POLARISIERTEN LASERSTRAHLS IN EINEN HOCHWIRKSAMEN STRAHL MIT ZWEI ORTHOGONAL POLARISIERTEN FREQUENZEN.

Steuerungsverfahren und -Vorrichtung eines optischen Wellenlängenfilters

An acousto-optic tunable filter

Optical modulator

An optical modulator comprises a substrate (101) and an optical device provided on the said substrate (101) and including a branching waveguide (111) for branching propagation light into two lights, two linear waveguides (112, 113) for propagating the propagation lights branched by the branching waveguide (111), and a synthesis waveguide (114) for synthesizing the propagation lights from the two linear waveguides (112, 113) such that a phase difference is provided to the propagation lights in the two linear waveguides (112, 113). The synthesis waveguide (114) includes two input waveguides (114a-1, 114a-2) for receiving the propagation lights from the two linear waveguides (112, 113) as inputs thereto, a waveguide coupling element (114a-5), and two output waveguides (114a-3, 114a-4) . The width of the waveguide coupling element (114a-5) on the input side is set greater than the width of the two input waveguides (114a-1, 114a-2) and the width of the waveguide coupling element (114a-5) on ...

ACOUSTO-OPTICAL FILTER HAVING SCANNED FREQUENCY COMPENSATED BY CONTROLLED BIREFRINGENCE

ACOUSTO-OPTIC DISPERSIVE LIGHT FILTER

... 19 The invention is directed to an acousto-optic dispersive light analyzer (AODLF) which is an electronically adjustable spectroscopic device capable of instantaneously monitoring many wavelengths with a fixed drive frequency. The AODLF has about a one octave range, whose center is selected by changing the RF. The resolution of the AODLF in the infrared is several thousand, and it is electronically adjustable. The acousto-optic device according to this invention is particularly useful for the detection and analysis of short light pulses. An additional capability of the AODLF is its operation in a derivative mode for enhanced SNR of coherence detection in the presence of a high incoherent background by imposing a very small frequency modulation on the RF applied to the AODLF. Then by phase locking each of the detector element signals at first the fundamental and then the first harmonic of the FM, the first and second spectrum derivatives of each resolution element can be observed.

ACOUSTO-OPTIC FILTER HAVING ELECTRICALLY VARIABLE RESOLUTION

SINGLE CRYSTAL ACOUSTO-OPTIC FILTER

ELECTRONICALLY TUNABLE ACOUSTO-OPTIC FILTER HAVING SELECTED CRYSTAL ORIENTATION

Verfahren zur spektralen Zerlegung eines hochfrequenten elektrischen Signales sowie Vorrichtung zu seiner Durchführung

Vorrichtung zur Beugung von Licht von einer ersten Polarisation in Licht mit einer zweiten Polarisation

Akustisch-Optische Beugungseinrichtung

Akusto-optische Filtervorrichtung

VERFAHREN UND VORRICHTUNG ZUM STEUERN DER DURCHLASSCHARAKTERISTIK EINES AKUSTO-OPTISCHEN FILTERS.

VERFAHREN UND VORRICHTUNG ZUM STEUERN DER INTENSITAET VON LICHT.

AKUSTO-OPTISCHES FILTER.

AKUSTO-OPTISCHES FILTER.

ACOUSTO?OPTIC FILTER HAVING ELECTRICALLY VARIABLE RESOLUTION

ACOUSTO?OPTIC FILTER HAVING AN INCREASED OPTICAL BEAM APERTURE

DEVICE ACOUSTO-OPTIQUE HAS ACOUSTIC TRANSDUCER HYBRID.

L'invention a pour objet un dispositif acousto-optique à transducteur acoustique hybride comprenant : - un cristal d'halogénure de mercure 2, - un transducteur acoustique hybride 1, 3, comprenant notamment - un cristal de paratellurite 1, et - un composant intermédiaire 5, étant solidaire, d'une part, d'une face 51 dudit cristal de paratellurite 1 et, d'autre part, d'une face 52 dudit cristal d'halogénure de mercure 2, lesdites faces 51, 52, étant en vis-à-vis l'une de l'autre. Le matériau constituant le composant intermédiaire 5 est choisi pour permettre la transmission d'ondes acoustiques transversales de cisaillement pures générées par ledit transducteur acoustique 3.

OPTICAL METHOD OF AND APPARATUS FOR RADIO FREQUENCY SPECTRUM ANALYSIS

GUIDED WAVE ELECTROOPTIC/ACOUSTOOPTIC TUNABLE FILTER

A two-port guided wave tunable filter in a birefringent electrooptic and/or acoustooptic substrate material includes two 3-port, symmetric Y-branch beamsplitters connected by two waveguide sections in which phase-matched polarization coupling occurs, with an input port and an output port. The optical path difference between the beamsplitters is half an optical wavelength, and the polarization coupling regions between the beamsplitters are relatively displaced by an odd integral multiple of half the spatial period of the pertubation responsible for the coupling. In an electrooptic tunable filter embodiment, the polarization coupling in the waveguides is caused by a spatially periodic strain-inducing film and tuning results from an applied electric field. In an acoustooptic tunable filter embodiment, polarization coupling results from a surface acoustic wave and tuning is accomplished by changing the acoustic frequency. Alternatively, four port electrooptic and acoustooptic tunable filters ...

Acousto-optic device and fabrication method of acousto-optic device

An acousto-optic device is disclosed which can achieve both of suppression of secular change and prevention of device damage and can maintain a stabilized wavelength selection filtering operation. The acousto-optic device includes a substrate on which a SAW guide for guiding a surface acoustic wave and an optical waveguide for guiding an optical wave are provided. A pyro-electricity coping conductive wiring pattern is provided in a region of the substrate other than the SAW guide and neutralizes polarization charge generated on a surface of the substrate.

Acoustic-optical filtering method and device based on a long acousto-optical interaction

L'invention a pour objet un procédé et un dispositif pour le filtrage acousto-optique de grande longueur d'interaction optique et acoustique; elle propose, à cet effet, l'utilisation un cristal acousto-optique biréfringent (PO1) dont la vitesse de propagation des ondes acoustiques est la plus faible possible, lequel cristal acousto-optique comprend sur l'une de ses faces (AB,BC,CD,DE,EF,FA), un transducteur piézo- électrique (T1) destiné à générer une onde acoustique transversale dont l'énergie se propage de manière colinéaire à l'énergie d'une onde optique incidente (Oi1), tout au long du trajet de ladite onde optique incidente, sachant que l'onde acoustique transversale et l'onde optique incidente parcourent un trajet (Z1,Z2,Z3,Z4) comportant des réflexions multiples sur l'une ou l'autre des faces réfléchissantes du cristal acousto-optique biréfringent.

Free Space Fibre-To-Fibre Coupling Using Optical Fibres Below Cut-Off

Method,apparatus and scanning microscope with means for stabilizing the temperature of optical components

Acousto-optic tunable filter

An acousto-optic tunable filter, for laser tuning, comprises an acoustic transducer (13) connected to one face of an anisotropic crystal (9) or Bragg cell which is cut at such an angle relative to its optic axis that an acoustic wave projected into the crystal normal to the said face causes wavelength-specific diffraction of an incident optic wave (from laser amplifying element 2) which nearly, but not completely, satisfies the parallel-tangents phase matching condition, thus preserving a substantial angular field of view, the said angle also being such that the said diffraction is polarisation-insensitive.

ACOUSTO-OPTICAL FILTERS

... 1447817 Controlling light HEWLETTPACKARD CO 29 Nov 1974 [18 Jan 1974] 51846/74 Heading H4F An acoustic - optic wavelength selective polarization switch, e.g. of the collinear type is provided with an acoustic terminator comprising a mass of Pb/Au alloy in the range 50/50 to 99/1 by weight, or a mass of Pb/Sn alloy in the range 20/80 to 80/20 by weight, a metallized adhesive layer being disposed between the mass and a surface of the switch. As particularly described the terminator comprises a Cr, Mo or Ti adhesive layer 50-100Š thick on the switch surface overlaid with 2000- 3000Š of Ni, and then with 2000Š of gold. Flux is applied to the gold layer and the switch heated to a temperature 5‹ to 10‹ C. above the melting point of the alloy before application thereof. The alloy mass, preferably 0À02 to 0À10cm. thick, is cooled slowly (1‹ C. per minute) to allow formation of a well orientated structure. The acoustic-optic material of the switch may be LiNbO 3 or PbMoO 4 but is preferably CaMoO ...

AN ACOUSTO-OPTIC TUNABLE FILTER

This invention provides an acousto-optic tunable filter 11 comprising an acousto-optic medium 12 and an electro-acoustic transducer 13 attached to a signal source 25 for applying acoustic signals to the medium 12 such that light from a source A at a frequency associated with that of the applied acoustic signal from source 25 and properties of the medium 12 is diffracted by the cell. The transducer 13 comprising a plurality of piezo-electric elements 14, 15, 16 and 17 connected electrically in series so as to provide the transducer 13 with a high impedance for impedance matching with the signal source 25. The elements are arranged parallel to the interaction plane of the acousto-optic medium 12 such that the gaps between adjacent elements do not detrimentally effect the wave vector distribution 27 of the output light. ...

ACOUSTO-OPTIC FILTERS

... 1401084 Modulating light HEWLETTPACKARD CO 21 July 1972 [10 April 1972] 3134/75 Divided out of 1401083 Heading H4F In a tunable optical filter of the type wherein a portion of a plane polarized optical beam 3 traversing a photo-elastic birefringent crystal 1 is diffracted by a collinear acoustic wave S 2 into an othogonal plane of polarization, and subsequently filtered by a polarization analyser 14, the optical output face 7 of the crystal has a normal which is inclined out of the plane defined by the input optical polarization vector Li and the acoustic group velocity vector (the acoustooptic interaction plane), whereby the acoustic energy is reflected out of the interaction plane and may be scattered into a number of modes. In this manner undesired acoustic resonances and optical interactions with the reflected wave(s) are reduced. In Fig. 1, the acoustic group velocity rector is parallel with beam 3. The input face 6 is inclined about an axis X and the output face about an orthogonal ...

Acousto-optic device with electrode having different transverse edge positions

An acousto-optic (AO) device200 suitable for use in a telecentric-confocal AOTF based imaging system includes an AO interaction crystal120 for receiving and propagating a light ray along an optical propagation direction (OPD). A piezoelectric transducer 115 is on at least one surface of the AO interaction crystal for receiving an electrical signal and emitting an acoustic wave into the AO interaction crystal. An electrode 210 is on the piezoelectric transducer for coupling an electrical signal to the piezoelectric transducer. The electrode 210 is a patterned electrode that includes a plurality of different transverse edge positions spanning a position range of at least five percent of an average height (Havg) of the electrode.

ACOUSTO-OPTIC FILTERS

... 1322689 Modulating light HEWLETTPACKARD CO 27 April 1972 [16 June 1971] 19702/72 Heading H4F In an optical filter of the type wherein a plane polarized light beam, for example from a broadband or laser source, is diffracted on a collinear acoustic wave within a birefringent medium, whereby light of a frequency related to the acoustic frequency is converted to the orthogonal polarization and separated by an analyser, the optical filter bandwidth and/or amplitudefrequency characteristic is varied by varying the acoustic spectrum in a corresponding manner. As described, the output of a wideband electrical radio frequency source, e.g. a noise generator or pulse modulated oscillator, is transmitted via a tunable and variable bandshaping filter to an acoustic transducer mounted on the birefringent medium.

PROCEDURE AND DEVICE FOR the ACUSTOOPTICAL FILTERING WITH GROßER of ACUSTOOPTICAL INTERACTION LENGTH

GUIDED WAVE ELECTROOPTIC/ACOUSTOOPTIC TUNABLE FILTER

A two-port guided wave tunable filter in a birefringent electrooptic and/or acoustooptic substrate material includes two 3-port, symmetric Y-branch beamsplitters connected by two waveguide sections in which phase-matched polarization coupling occurs, with an input port and an output port. The optical path difference between the beamsplitters is half an optical wavelength, and the polarization coupling regions between the beamsplitters are relatively displaced by an odd integral multiple of half the spatial period of the pertubation responsible for the coupling. In an electrooptic tunable filter embodiment, the polarization coupling in the waveguides is caused by a spatially periodic strain-inducing film and tuning results from an applied electric field. In an acoustooptic tunable filter embodiment, polarization coupling results from a surface acoustic wave and tuning is accomplished by changing the acoustic frequency. Alternatively, four port electrooptic and acoustooptic tunable filters are formed by replacing the 3- port beamsplitters with 4-port directional couplers.

ACOUSTO?OPTIC FILTER HAVING AN INCREASED OPTICAL BEAM APERTURE

Programmable acousto-optic filter includes birefringent material in which optical signals couple with acoustic wave pattern

Le dispositif selon l'invention comprend, d'une part, un milieu élasto-optique biréfringent (1) muni d'un transducteur (5) générant dans le milieu (1) une onde acoustique modulée selon une direction déterminée, et des moyens de couplage dans le milieu (1) d'une onde optique d'entrée de polarisation inconnue et, d'autre part, un circuit de programmation de la modulation (amplitude-phase-fréquence) de l'onde acoustique. Ce dispositif fournit une onde directe et deux ondes diffractées de polarisation H, V perpendiculaires portant chacune une modulation fonction de la modulation de l'onde optique d'entrée et de la modulation de l'onde acoustique.

A MINIATURE, NARROW BAND, NON-COLLINEAR ACOUSTIC OPTICAL TUNABLE FILTER FOR TELECOM APPLICATIONS

This invention includes an Acousto-optical tuning device by employing the Te02 in shear mode, non-collinear and in high RF frequency (or large Bragg's deflection region), it is able to achieve the telecomm worthy tunable filter that provides high tuning speed, no-moving parts, very narrow filter line-width (0.2nm for instance) and with miniature size practical for a optical telecom active module. This tuning characteristic is achieved by taking the particular advantages that the angle of incidence (AOI) and angle of diffraction (AOD) are divergent in a frequency range just suitable for a shorter wavelength application required by modern telecommunication systems while the acoustic wave decay in this frequency range can be properly managed to achieve the design goals. Furthermore, by generating a diffracted beam with larger AOD, implementation of filtering for optical propagations of different wavelengths can be conveniently selected. Other than the Te02 crystals, the AOTF can also be formed ...

AOTF-BASED IMAGING SYSTEM AND METHOD FOR HYPERSPECTRAL AND MULTISPECTRAL IMAGING OF SPECIMENS INCLUDING MEDICAL TISSUE

An imaging system includes a platform for placement of a sample or an animal to be imaged, and at least one excitation light source for irradiating the sample or animal to stimulate an emission at a plurality of different center wavelengths. An acousto-optic tunable filter (AOTF) is provided that comprises a piezoelectric transducer crystal for emitting an acoustic wave having a ground electrode disposed on one side of the piezoelectric crystal. A patterned electrode layer is disposed on a side of said piezoelectric crystal opposite the ground electrode. The patterned electrode layer includes a continuous region proximate to its center and a discontinuous region, a pattern in the discontinuous region comprising a plurality of spaced apart features electrically connected to the continuous region, and an AO interaction crystal receiving the acoustic wave attached to the ground electrode or the patterned electrode layer.

Apparatus to transform a single frequency, linearly polarized laser beam into a beam with two, orthogonally polarized frequencies

An electro-optical apparatus transforms a single stabilized frequency, linearly polarized laser input beam (18) from a light source (10) into an output beam (46) having two orthogonal polarization components of different frequency. The input beam (18) is provided to an acousto-optic Bragg cell (20) which is driven by the output of an electrical oscillator (30) which provides the Bragg cell (20) with a frequency stabilized electrical signal (32) comprised of two different frequencies. The Bragg cell (20) transforms the input beam (18) into two intermediate beams (40, 42) having the same linear polarization as the input beam (18) but whose directions of propagation and frequencies differ from the input beam (18) and which are at one-half the intensity of the input beam (18). The Bragg cell (20) output is provided to a birefringent prism (44) which splits the intermediate beams (40, 42) into the two orthogonal polarization components of the output beam (46), at one-half the intensity of the ...

Wavelength selectable laser oscillator in wavelength tunable laser

An object of the present invention is to provide a wavelength selectable laser oscillator in wavelength tunable laser by which the rate of repetitive pulse oscillation of laser beam in a laser resonator can be markedly increased in comparison with that of conventional ones, besides excitation input can be decreased, and in addition, speed-up of wavelength tuning speed can be achieved, whereby flexibility is remarkably elevated in case of practicing the wavelength selectable laser oscillator. The wavelength selectable laser oscillator in wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity; a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto-optical crystal disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means mounted on the acousto-optical ...

Method and apparatus for selecting wavelength

A wavelength selecting apparatus includes a wavelength selecting filter and that a monitoring filter are similar acousto-optic tunable filters; a light source that outputs light having a specific wavelength to the monitoring filter; a light receiving unit that detects a wavelength of light that has passed the monitoring filter; and a control unit that outputs, to the wavelength selecting filter, a control signal having a control frequency to selectively pass light of a desirable wavelength. The light source includes a light emitting element that emits light of a wide wavelength band; and an optical filter having at least two transmission bands through which the light passes to the monitoring filter. The control unit, based on at least two wavelengths of the light output by the light source, outputs a control signal having a control frequency corresponding to the desirable wavelength.

Collinear acousto-optical tunable filter and acousto-optically tunable laser

A collinear, acousto-optical, tunable filter is described. A well-collimated, polarized beam of light enters a crystal of Tl3AsSe3. A sound wave generated in the crystal collinear to the light rotates the plane of polarization of the light. A method of analyzing a light spectrum is also disclosed.

Combined acousto-optic device from optically birefringent crystal

Combined acousto-optic device formed by a cut from optically birefringent single crystal whose one face, parallel to the direction of the principal crystallographic axis, is provided with at least one piezoelectric source of acoustic waves. At that, the normal to the entrance face of the ordinary and extraordinary light beam is inclined from the direction of principal crystallographic axis by an angle rho defined by formula rho =arc tg(ne/no)+/-20 DEG , in which the symbols ne and no denote the refractive indices of the extraordinary and ordinary light beams in the single crystal.

OPTICAL INSTRUMENT AND METHOD FOR DETERMINING A WAVELENGTH OF LIGHT GENERATED BY A LIGHT SOURCE, AND OPTICAL SYSTEM COMPRISING THE OPTICAL INSTRUMENT

An optical instrument for determining a wavelength of light generated by a light source. The optical instrument may include a signal generator for generating a driving signal, a tunable optical filter device configured to receive the driving signal, the tunable optical filter device configured to diffract the light generated by the light source based on the driving signal, an optical detector device configured to detect a timing of maximum diffraction of light diffracted by the tunable optical filter device, and an analyzer configured to determine the wavelength of the light based the timing of maximum diffraction. 1. An optical instrument for determining a wavelength of light generated by a light source , comprisinga signal generator for generating a driving signal,a tunable optical filter device configured to receive the driving signal, the tunable optical filter device configured to diffract the light generated by the light source based on the driving signal,an optical detector device configured to detect intensity as a degree of diffraction of the light diffracted by the tunable optical filter device, andan analyzer configured to determine the wavelength of the light based on the timing of the diffraction.2. The optical instrument of claim 1 , wherein the tunable optical filter device includes an acousto-optic tunable filter (AOTF).3. The optical instrument of claim 1 , wherein the signal generator generates the driving signal which is a frequency-modulated wave whose frequency is swept from a minimum frequency to a maximum frequency.4. The optical instrument of claim 3 , wherein the signal generator is configured to generate a trigger signal simultaneous to the generation of the driving signal frequency sweep for indicating a start of the driving signal frequency sweep.5. The optical instrument of claim 1 , wherein the signal generator is configured to be coupled to the light source claim 1 , the signal generator configured to supply a trigger signal to the ...

Optical waveguide device, optical modulator and acousto-optic tunable filter

An optical modulator embodying the present invention includes an optical waveguide (10) which in turn includes two input waveguides (11, 12) to which propagation lights from a linear waveguide are inputted, a waveguide coupling element (15), and two output waveguides (13,14). The width (Ww1) of the waveguide coupling element (15) on the input side is greater than the total width of the two input waveguides (11, 12), and the width (Ww2) of the waveguide coupling element (15) on the output side is greater than the total width of the two output waveguides (13, 14). Substrate (2) may have an electro-optical effect. An acousto-optic tunable filter (400) has, inter alia a polarisation wave separating waveguide (430).

Acousto-optical device

An acousto-optical device comprising a composite of liquid crystalline (LC) capsules dispersed in a binder material, whereby an ultrasound waves are applied to the composite. The acousto-optical device may be an acousto-optical sensor for non-destructive testing (NDT) utilising the acousto-optic effect. The liquid crystal (LC) capsule may comprise: a polymeric shell; a core containing mesogenic medium; a binder selected from water-soluble polymers or waterborne latex binders, where the binders may also coprise polyvinyl alcohol. The capsule may have a size in the range of 1 nano-metre (1 x 10^-9 metres) to 10 micro-metres (1 x 10^-6 metres) [1nm – 10µm], with a film thickness in the range of 0.5 micro-metres (5 x 10^-7 metres) to 50 micro-metres (5 x 10^-5 metres) [0.5µm – 50µm].

Guided wave electrooptic/acoustooptic tunable filter

ACOUSTO-OPTIC FILTER

ELECTRONICALLY TUNABLE ACOUSTO-OPTIC FILTER HAVING SELECTED CRYSTAL ORIENTATION

ELECTRONICALLY TUNABLE ACOUSTO-OPTIC FILTER HAVING IMPROVED LIGHT AND ACOUSTIC WAVE INTERACTION

OPTICALLY PARAMETRIC OSCILLATOR

An object of the present invention is to speed up a wavelength tuning speedthereby varying both wavelengths of signal light and idler light at high speed. The optically parametric oscillator according to the present invention wherein aresonator is composed of an output coupling mirror having a prescribed transmittivity and a total reflection mirror, a nonlinear crystal is disposed in the resonator, the outgoing laser beam outputted from the laser oscillator is inputted into the resonator as excitation light to excite the nonlinear crystal, whereby both signal light and idler light having a wavelength in response to the wavelength of the excitation light, respectively, are outputted, characterized by a laser resonator composed of opposed mirrors each having a prescribed reflectivity, a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in the wavelength zone within aprescribed range, an acousto-optical crystal disposed in the laser resonator ...

DEVICE AND METHOD FOR DEMODULATING A MODULATED SIGNAL ON AN OPTICAL CARRIER

OPTICAL METHOD OF AND APPARATUS FOR RADIO FREQUENCY SPECTRUM ANALYSIS

ACOUSTO?OPTIC FILTER HAVING ELECTRICALLY VARIABLE RESOLUTION

Connecting method of optical function devices, and optical apparatus

The present invention aims at providing a connecting method capable of suppressing an influence of stray light for a plurality of optical function devices formed on the same substrate, and an optical apparatus applied with the control method. To this end, in the connecting method of optical function devices according to the present invention, the plurality of optical function devices formed on the same substrate are cascade connected so that both ends of an optical path passing through the plurality of optical function devices are positioned on the same end face of the substrate. According to such a connecting method, it becomes possible to effectively suppress a leakage of stray light from an optical input side to an optical output side.

AKUSTISCHER ABSCHLUSS FUER EIN AKUSTOOPTISCHES FILTER

LICHTIMPULSKONTROLLE MITTELS PROGRAMMIERBARER AKUSTOOPTISCHER VORRICHTUNG

LIGHT PULSE CONTROL OF MEANS OF PROGRAMMABLE ONES OF ACUSTOOPTICAL DEVICE

ACOUSTO-OPTIC FILTER HAVING MEANS FOR DAMPING ACOUSTIC RESONANCES

ACOUSTO-OPTIC FILTER HAVING MEANS FOR DAMPING ACOUSTIC RESONANCES

ACOUSTO-OPTIC FILTER

ACOUSTO-OPTIC FILTER HAVING MEANS FOR DAMPING ACOUSTIC RESONANCES

WAVELENGTH SELECTABLE LASER OSCILLATOR IN WAVELENGTH TUNABLE LASER

An object of the present invention is to provide a wavelength selectable laser oscillator in wavelength tunable laser by which the rate of repetitive pulse oscillation of laser beam in a laser resonator can be markedly increased in comparison with that of conventional ones, besides excitation input can be decreased, and in addition, speed- up of wavelength tuning speed can be achieved, whereby flexibility is remarkably elevated in case of practicing the wavelength selectable laser oscillator. The wavelengthselectable laser oscillator in wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity; a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto-optical crystal disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means mounted on the acousto-optical ...

METHOD AND APPARATUS FOR FILTERING A PROGRAMMABLE ACOUSTO-OPTICAL DISPERSIVE.

Acousto-optics filtering method for e.g. acousto-optic tunable filter, involves forming reflexions on one another of reflective faces of acousto-optic perpendicular to axes common to all curves

The method involves utilizing a piezo-electric tranducer (T1) for generating a transverse acoustic wave whose energy is propagated in a colinear manner to energy of incidental optical wave (Oi1). The waves have multiple reflexions on one another of reflective faces (AB, BC, CD, OF, EA) of a bi-refringent crystal acousto-optic perpendicular to symmetry axes common to a curve of acoustic slownesses and curves of optical indices ordinary and extraordinary of the crystal. The acousto-optics is made of tellurium dioxide, calomel and potassium dihydrogen phosphate. An independent claim is also included for a device for acousto-optics filtering, comprising reflective faces.

ACOUSTO?OPTIC FILTER HAVING MEANS FOR DAMPING ACOUSTIC RESONANCES

Acousto-optical component

An acousto-optical component is suggested, in particular for use in the beam path of an optical arrangement, preferably of a microscope, with a crystal for the passage of light. Sound waves are generated via an electrical transducer and passed through the crystal. The sound waves passing through the crystal affect the optical properties of the crystal and therefore the light passing through the crystal. For exerting a variable influence on the light passing through the crystal, the sound waves passing through the crystal, or the acoustic field in the crystal, are/is variable.

MULTI-QUBIT CONTROL WITH ACOUSTO-OPTIC MODULATORS

Aspects of the present disclosure describe techniques for controlling quantum states of ions in an ion chain for a quantum operation. For example, a method is described that includes providing, from a first direction, a global optical beam to the ions in the ion chain, and providing, from a second direction different from the first direction, to each ion in a subset of the ions in the ion chain, a respective addressing optical beam. The method further includes dynamically controlling each of the addressing optical beams being provided by using a respective channel in a multi-channel acousto-optic modulator (AOM) to implement, with the ion chain, one or more quantum gates in a sequence of quantum gates of the quantum operation. Aspects of a quantum information processing (QIP) system that includes the multi-channel AOM for performing the method are also described.

Mikroskop und Mikroskopierverfahren

Mikroskop mit mindestens einem Beleuchtungsstrahl, der in einem Teilbereich entlang seines Querschnitts mit einer Modulationsfrequenz phasenmoduliert wird und einem Mikroskopobjektiv zur Fokussierung des Beleuchtungsstrahls in eine Probe sowie einem Detektionsstrahlengang und mindestens einem Mittel zur Demodulation, wobei mindestens ein polarisationsänderndes Element im Beleuchtungsstrahlengang vorgesehen ist, dem eine Phasenplatte nachgeordnet ist, die mindestens zwei Bereiche mit unterschiedlicher Phasenbeeinflussung aufweist. Eine zweite Ausführung betrifft ein Mikroskop mit mindestens einem Beleuchtungsstrahl, und einem Mikroskopobjektiv zur Fokussierung des Beleuchtungsstrahls in eine Probe sowie einem Detektionsstrahlengang mit mindestens einem Demodulator, wobei der Beleuchtungsstraufgeteilt wird und in einem der Strahlengänge ein Element zur Erzeugung eines zum ersten Strahlengang unterschiedlichen Feldmodes vorgesehen ist und die beiden Strahlengänge mit unterschiedlichen Feldmoden ...

Acousto-optical variable filter

PROCESS AND DEVICE FOR FILTERING ACOUSTO-OPTIQUE BIG LENGTH Of OPTICAL AND ACOUSTIC INTERACTION

METHOD AND APPARATUS FOR CONTROL OF LIGHT TRANSMISSION THROUGH AN ANISOTROPIC MEDIUM

PROCESS AND DEVICE FOR PROGRAMMABLE FILTERING ACOUSTO-OPTIQUE OF HIGH-RESOLUTION IN THE INFRA-RED RANGE.

ELECTRONICALLY TUNABLE ACOUSTO?OPTIC FILTER HAVING IMPROVED LIGHT AND ACOUSTIC WAVE INTERACTION

ELEMENT COMBINES ACOUSTO-OPTIQUE FORMS Of a BIREFRINGENT CRYSTAL

METHOD AND APPARATUS FOR FILTERING ACOUSTO-DISPERSIVE OPTICAL PROGRAMMABLE.

Procédé pour le filtrage acousto-optique dispersif programmable, sachant qu'il comprend : - la fourniture d'un cristal biréfringent (DI) de symétrie trigonale, - la génération d'un premier faisceau optique à l'intérieur dudit cristal (DI), de direction de propagation est (Fin), - la génération d'un faisceau acoustique dont la direction de propagation (FA) est confondue d'une part avec la direction de propagation (Fin) dudit premier faisceau optique et d'autre part avec la direction (Fout) d'un second faisceau optique obtenu par diffraction dudit premier faisceau optique par ledit faisceau acoustique, ledit second faisceau optique constituant la sortie filtrée dudit premier faisceau optique. Process for the programmable dispersive acousto-optical filtering, knowing that it comprises: - the supply of a birefringent crystal (DI) of trigonal symmetry, - the generation of a first optical beam inside said crystal (DI), propagation direction is (Fin), - the generation of an acoustic beam whose propagation direction (FA) coincides on the one hand with the propagation direction (Fin) of said first optical beam and on the other hand with the direction (Fout) of a second optical beam obtained by diffraction of said first optical beam by said acoustic beam, said second optical beam constituting the filtered output of said first optical beam.

ACOUSTO-OPTICAL COMPONENT

An acousto-optical component, in particular for use in the beam path of an optical arrangment, preferably of a microscope, with a crystal (3) for the passage of light, wherein sound waves are generated via an electrical transducer (4) and passed through the crystal (3), and wherein the sound waves passing through the crystal (3) affect the optical properties of the crystal (3) and therefore the light passing through the crystal (3), is characterized in that, to exert a variable influence on the light passing through the crystal (3), the sound waves passing through the crystal (3), or the acoustic field in the crystal (3), are/is variable.

ACOUSTO-OPTIC DEVICES

An acousto-optic module is provided, comprising a number of partially coupled optical resonators (305, 310) distributed within a dielectric medium (305) and at least one acoustic transducer (315) mounted on a surface of the dielectric medium for injecting an acoustic wave into the optical resonators (305, 310) so as to diffract light (325) passing therethrough by means of Bragg diffraction. This acousto-optic module has been applied in particular to an improved tuneable optical filter in which an acoustic shear wave is generated and which travels through the acousto-optic module in a direction substantially parallel with a polarised light signal passing therethrough. The acousto-optic module is also applied to an improved optical frequency shifter.

TUNABLE LASER FOR OUTPUTTING NON-POLARIZED LIGHT

A tunable laser for outputting non-polarized light comprises a first reflection mirror (72), a broadband laser gain medium (76), a tunable Fabry-Perot filter (400), a tunable acoustooptic filter (500), a second reflection mirror (84), a third reflection mirror (86), and a laser control circuit (88). A broadband light beam sent by the broadband laser gain medium (76) is filtered by the tunable Fabry-Perot filter (400) and then is filtered by the tunable acoustooptic filter (500). A first-grade diffraction light beam of the tunable acoustooptic filter (500) is divided into two beams of polarized light with polarization states perpendicular to each other, and a zero-grade diffraction light beam of the tunable acoustooptic filter (500) serves as an output light beam of the laser. The tunable laser for outputting non-polarized light implements continuous, rapid and precise tuning on the output light of the laser in a wide spectral range, has characteristics of absence of mechanical movement ...

Polarization-independent acousto-optic tunable filter

A polarization independent acousto-optic tunable filter (PIAOTF) used for multiwavelength switching and routing in wavelength division multiplexing (WDM) networks. In the PIAOTF an incident unpolarized light beam is divided to propagate and to be diffracted along two polarization division branches. By using polarization converters and equal optical paths for the two polarization division channels, a PIAOTF is created which minimizes polarization dependent loss and polarization mode dispersion. Furthermore, a preferred embodiment of the AOTF using an elongated acousto-optic interaction medium is described that provides the additional advantages of narrow bandwidth, lower drive power and easier alignment.

FREE SPACE FIBRE-TO-FIBRE COUPLING USING OPTICAL FIBRES BELOW CUT-OFF

A method of free space fibre-to-fibre coupling includes providing a first optical fibre and a second optical fibre spaced apart from one another by a free space distance having a pair of spaced-apart achromatic collimating lenses within the free space distance. Essentially single mode light is launched from the first fibre at a wavelength λ or a range of λs that provides at least a portion of its light at wavelength(s) below a cut-off wavelength for the first fibre. The first optical fibre and second optical fibre are both <50 m and sufficiently short to provide essentially single mode operation. The essentially single mode light after the launching propagates as free space light through said free space distance and is received by and propagates in the second optical fibre as essentially single mode light.

SYSTEMS AND METHODS FOR ALIGNMENT OF ANISOTROPIC INCLUSIONS IN ADDITIVE MANUFACTURING PROCESSES

Three-dimensional printing methods and systems use a derived geometry and aligns anisotropic inclusions in any orientation at any number of discrete volumetric sections. Structural, thermal, or geometry-based analyses are combined with inclusion alignment computations and print preparation methods and provided to 3D printers to produce composite material parts that meet demanding geometric needs as well as enhanced structural and thermal requirements. In one example, optimal inclusion alignment vectors associated with a section of the object are calculated based on specifications for the object, segmenting a three-dimensional model of the object into layer slices, grouping each section within each layer slice having similar alignment vectors and combining the groupings and generating printing instructions for the object according to the grouped alignment vectors. 1. A method for producing machine-readable instructions for manufacturing an object having anisotropic inclusions , the method comprising:receiving, from an object design application, a specification file describing the object as a three-dimensional model;defining a plurality of optimal inclusion alignment vectors, each inclusion alignment vector being associated with a daxel of the object and based at least in part on the specification file;segmenting the three-dimensional model into layer slices;grouping each daxel within each layer slice having substantially similar alignment vectors;combining the groupings into subdivided slices; andgenerating machine instructions directing a three-dimensional printer to manufacture the object having anisotropic inclusions aligned according to the grouped alignment vectors.2. The method of further comprising receiving results from a finite element analysis claim 1 , and wherein the optimal inclusion alignment vectors are further based on the received finite element analysis results.3. The method of further comprising receiving a predefined claim 1 , layer-specific set ...

CONTROL METHOD AND CONTROL APPARATUS OF OPTICAL WAVELENGTH VARIABLE FILTER

The present invention aims at providing a control method and a control apparatus for controlling variable selected wavelengths at respective stages with high accuracy and reliability, to obtain desired wavelength characteristics, in a multi-staged band rejection type optical wavelength variable filter. To this end, the optical wavelength variable filter in the present invention has wavelength characteristics formed with a blocking band including a wavelength width according to a deviation amount obtained by deviating respective selected wavelengths from one another of a plurality of optical filter sections that are cascade connected, and the control apparatus for controlling the wavelength characteristics of this optical wavelength variable filter comprises a dropped light monitoring section that takes out to monitor a dropped light to be blocked from passing through at the optical filter section corresponding to the selected wavelength most closest to the center wavelength of the blocking ...

OPTICALLY TRANSPARENT ACOUSTIC WAVE TRANSDUCER

Acousto-optic tunable filter and method of calculating its equivalence incident angle

In a non-collinear type acousto-optic tunable filter, the incident angle of a source light beam L1 radiated from a light source 6 onto an acoustic medium 1 is set at an equivalence incident angle for which the wavelength lambda i of the diffracted ordinary ray L3 and the wavelength lambda i' of the diffracted extraordinary ray L4 become approximately identical. Further, the diffracted ordinary ray L3 and the diffracted extraordinary ray L4 of the approximately identical wavelength are superposed, and the intensity of the superposed ray is detected. Consequently, spectrometry is performed based on the superposed diffracted ray having twice the intensity and a very sharp waveform, so that accurate spectroscopy can be made possible even if the intensity of the source light beam is low.

Optical device module

An optical device module includes an optical device, a soaking unit fixed to one surface of the optical device, a heating/cooling unit fixed to one surface of the soaking unit, a heat-insulating unit fixed to one surface of the heating/cooling unit, and a package that houses the optical device, the soaking unit, the heating/cooling unit, and the heat-insulating unit and to which the heat-insulating unit is fixed. The heating/cooling unit heats the optical device using self-generated heat or cools the optical device via the soaking unit.

Acousto-optic interactive structure

An acousto-optic structure according to an exemplary embodiment of the present invention is a stacked structure for inducing an interaction between incident acoustic wave and incident optical wave, and it includes: a pair of multi-layered structures including a structure in which two layers with different acoustic impedance and optical impedance are alternately arranged in a direction in which the acoustic wave and the optical wave propagate; and a cavity layer disposed between the pair of multi-layered structures in the direction in which the acoustic wave and the optical wave propagate, and made of a medium having acoustic impedance and optical impedance that are different from those of interfacing layers at both sides, wherein the two layers are symmetrically arranged with respect to the cavity layer so that the acoustic wave and the optical wave may be confined in the cavity layer.

Control method and device for optical filter

OPTICAL ELEMENT

Provided is an optical element with which a high diffraction efficiency can be obtained with a simple configuration. The optical element includes: an optically-anisotropic layer that is formed using a composition including a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, and the optically-anisotropic layer has a region in which an alignment direction of a liquid crystal compound in at least one of upper and lower interfaces has a pre-tilt angle with respect to the interface. 1. An optical element comprising:at least one optically-anisotropic layer that is formed using a composition including a liquid crystal compound,wherein at least one of the optically-anisotropic layers has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, andthe optically-anisotropic layer has a region in which an alignment direction of a liquid crystal compound in at least one of upper and lower interfaces has a pre-tilt angle with respect to the interface.2. The optical element according to claim 1 ,wherein in the at least one interface, the region having a pre-tilt angle and a region not having a pre-tilt angle are periodically present.3. The optical element according to claim 1 ,wherein the optically-anisotropic layer has a region having twisting properties in a thickness direction.4. The optical element according to claim 1 ,wherein in the optically-anisotropic layer, the liquid crystal compound is cholesterically aligned in a thickness direction.5. The optical element according to claim 1 , comprising:two or more optically-anisotropic layers having different alignment patterns.6. The optical element according to claim 5 ,wherein the two or more ...

SYSTEM FOR GENERATING SHORT OPTICAL PULSES OF A DURATION SHORTER THAN THE PERIOD OF THE OPTICAL CARRIER USING THE PRINCIPLE OF PARAMETRIC AMPLIFICATION

Generator of short optical pulses includes: 1. System for generating short optical pulses of a duration shorter than the period of the optical carrier using the principle of the parametric amplification , which comprises:{'b': '1', 'a first generator of optical pulses (P, B) outputting pulses with a wavelength substantially equal to λ/2 and a spectral width less than λ/3;'}{'b': '2', 'a second generator of optical pulses (B) outputting pulses of a duration less than 10 picoseconds at a wavelength substantially equal to λ/3;'}{'b': '1', 'a device (R) for collinearly recombining the pulses from the first and second optical pulse generators;'}{'b': 1', '1, 'a first parametric amplification device (OPA) receiving the output of said recombination device (R) as input;'}{'b': 2', '1, 'a filter (F) extracting from the output of the first parametric amplification device (OPA) a band centred about a wavelength substantially equal to λ;'}{'b': '2', 'a second harmonic generator (SH) receiving the output of said filter (F) as input and generating a band centred about a wavelength substantially equal to λ/2;'}{'b': '2', 'a programmable device for controlling the delay and the spectral phase (DCDP) making it possible to temporally adjust the pulses corresponding to said bands, in such a way as to allow for the generation, by constructive interference, of a pulse with a wavelength substantially equal to λ/3 and of a duration less than the period of the optical cycle.'}22. Device according to claim 1 , further comprising a dispersive device (C) carrying out a compression and bringing the pulses from the programmable device (DCDP) to their minimum duration.322. System according to claim 1 , further comprising a parametric amplification device (OPA) receiving the uncompressed pulses from the programmable device (DCDP).412. System according to claim 1 , wherein one or each programmable device for controlling the delay and the spectral phase (DCDP claim 1 , DCDP) is an acousto-optic ...

METHOD AND SIGNAL GENERATOR FOR CONTROLLING AN ACOUSTO-OPTIC ELEMENT

A method for actuating an acoustooptical element includes generating an actuation signal by a direct digital synthesis (DDS) method using a signal value sequence made up of at least two frequency components. A signal generator for actuating an acoustooptical element is configured to perform the method. An arrangement includes the signal generator and the acoustooptical element. A microscope includes the arrangement. 1. A method for actuating an acoustooptical element , the method comprising:generating an actuation signal by a direct digital synthesis (DDS) method using a signal value sequence made up of at least two frequency components.2. The method as claimed in claim 1 , wherein the signal value sequence is made up of integer periods of each of the at least two frequency components.3. The method as claimed in claim 1 , wherein the signal value sequence is made up of at least three frequency components claim 1 , and wherein at least one pair of two of the frequency components is at a same frequency interval from one another as another pair of two of the frequency components.4. The method as claimed in claim 3 , wherein each even number of pairs of two of the frequency components is at the same frequency interval from one another.5. The method as claimed in claim 1 , wherein the signal value sequence is made up of an uneven number of frequency components.6. The method as claimed in claim 1 , wherein a phase of at least one of the frequency components is prescribed at a specific time in order to alter a maximum in the signal value sequence.7. The method as claimed in claim 1 , wherein a phase increment is prescribed for sweeping the signal value sequence based on a temperature of a crystal of the acoustooptical element.8. The method as claimed in claim 1 , wherein the frequency components are prescribed such that the signal form is repeated after a time less than or equal to a threshold value.9. The method as claimed in claim 8 , wherein the threshold value is 250 ...

ACOUSTO-OPTICAL DEVICE AND METHOD

An apparatus for reducing a chromatic spread angle of light diffracted at an acousto-optic element includes the acousto-optic element and a first and a second focusing optical unit. The acousto-optic element is disposed in a beam path of an incident light beam and is configured to generate the diffracted light from the incident light beam such that the diffracted light emanates from a virtual interaction point of the acousto-optic element. The first focusing optical unit is disposed in the beam path upstream of the acousto-optic element and the second focusing optical unit is disposed in the diffracted light such that a focus of the incident light beam is situated downstream of the first focusing optical unit in the acousto-optic element and the virtual interaction point is located in a front focus of the second focusing optical unit. 1. An apparatus for reducing a chromatic spread angle of light diffracted at an acousto-optic element , the apparatus comprising:the acousto-optic element which is disposed in a beam path of an incident light beam and is configured to generate the diffracted light from the incident light beam such that the diffracted light emanates from a virtual interaction point of the acousto-optic element; anda first and a second focusing optical unit, the first focusing optical unit being disposed in the beam path upstream of the acousto-optic element and the second focusing optical unit being disposed in the diffracted light such that a focus of the incident light beam is situated downstream of the first focusing optical unit in the acousto-optic element and the virtual interaction point is located in a front focus of the second focusing optical unit.2. The apparatus as claimed in claim 1 , wherein the incident light beam is a pulsed light beam from a pulsed light-emitting laser light source with a pulse duration ≤1000 fs.3. The apparatus as claimed in claim 1 , wherein the diffracted light is diffracted light of the +1/−1order.4. The apparatus ...

MICROSCOPE AND MICROSCOPY TECHNIQUES

A microscope with at least one illumination beam that is phase modulated in a section along its cross-section with a modulation frequency and a microscope lens for focusing the illumination beam into a test as well as a detection beam path and at least one means of demodulation, wherein at least one polarization altering item is scheduled in the illuminating beam path, for which a phase plate is subordinated that exhibits at least two areas with different phase influence. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. A microscope with at least one illumination beam and a microscope lens for focusing the illumination beam into a test , as well as a detection beam path with at least one demodulator , wherein the illumination beam is apportioned alternately to at least two beam paths and , on one of the beam paths , an element is scheduled for generating a field mode that is different from the first beam path and the two beam paths are overlaid with different field modes in the focus.15. A microscope according to claim 14 , wherein switching the beam paths takes place by a polarization switch.16. A microscope according to claim 15 , wherein the polarization switch consists of at least one electro-optical modulator and at least one pole splitter.17. A microscope according to claim 14 , wherein a mode deviating from the Gauss claim 14 , mode claim 14 , specifically a donut mode claim 14 , is generated.18. A microscope according to claim 14 , wherein the beam paths are generated as two orderings after the passageway of the illumination beam by an AOM or AOTF.19. A microscope according to claim 18 , wherein the beam paths are generated alternatingly and are linked back via reflectors by the AOM or AOTF into the same beam direction.20. A microscope according to claim 14 , wherein for generating the different field mode a spiral phase mask or a ...

MULTI-QUBIT CONTROL WITH ACOUSTO-OPTIC MODULATORS

Aspects of the present disclosure describe techniques for controlling quantum states of ions in an ion chain for a quantum operation. For example, a method is described that includes providing, from a first direction, a global optical beam to the ions in the ion chain, and providing, from a second direction different from the first direction, to each ion in a subset of the ions in the ion chain, a respective addressing optical beam. The method further includes dynamically controlling each of the addressing optical beams being provided by using a respective channel in a multi-channel acousto-optic modulator (AOM) to implement, with the ion chain, one or more quantum gates in a sequence of quantum gates of the quantum operation. Aspects of a quantum information processing (QIP) system that includes the multi-channel AOM for performing the method are also described. 1. A method of controlling quantum states of ions in an ion chain for a quantum operation , comprising:providing, from a first direction, a global optical beam to the ions in the ion chain;providing, from a second direction different from the first direction, to each ion in a subset of the ions in the ion chain, a respective addressing optical beam; anddynamically controlling each of the addressing optical beams being provided by using a respective channel in a multi-channel acousto-optic modulator (AOM) to implement, with the subset of ions in the ion chain, one or more quantum gates in a sequence of quantum gates of the quantum operation.2. The method of claim 1 , wherein the second direction is opposite the first direction.3. The method of claim 1 , wherein the second direction is 90 degrees offset from the first direction.4. The method of claim 1 , further comprising monitoring an accumulated phase shift in each of the ions in the ion chain claim 1 , wherein dynamically controlling each of the addressing optical beams being provided includes independently modulating each of the addressing optical beams ...

METHOD AND DEVICE FOR ACTUATING AN ACOUSTO-OPTIC ELEMENT

A method for actuating an acousto-optic element comprising an acousto-optic crystal and a piezoelectric converter for setting the acousto-optic crystal into mechanical oscillation includes exciting the piezoelectric converter by at least two different frequencies simultaneously. The piezoelectric converter is also excited by at least one mixed frequency from the at least two different frequencies. 1. A method for actuating an acousto-optic element comprising an acousto-optic crystal and a piezoelectric converter for setting the acousto-optic crystal into mechanical oscillation , the method comprising:exciting the piezoelectric converter by at least two different frequencies simultaneously; andexciting the piezoelectric converter also by at least one mixed frequency from the at least two different frequencies.2. The method according to claim 1 , wherein an amplitude of the excitation having the at least one mixed frequency is selected such that the amplitude precisely or substantially corresponds to an amplitude of an oscillation at the same at least one mixed frequency at which the piezoelectric converter is excited owing to nonlinearity.3. The method according to claim 1 , wherein a phase of the excitation having the at least one mixed frequency is selected such that at least one interfering frequency portion is compensated for claim 1 , and/or such that the phase is precisely or substantially in phase opposition to an oscillation at the same at least one mixed frequency at which the piezoelectric converter is excited owing to nonlinearity.4. The method according to claim 1 , wherein the piezoelectric converter is excited by more than one mixed frequency from the at least two different frequencies.5. The method according to claim 1 , wherein the piezoelectric converter is excited by all the mixed frequencies within the range of between half of a lowest frequency of the at least two different frequencies and double a highest frequency of the at least two frequencies ...

VIEWING ANGLE CONTROL FILM AND IMAGE DISPLAY DEVICE

A viewing angle control film includes, in order, a first polarizer in which an absorption axis is in a direction perpendicular to a film surface; a first phase difference plate which is a λ/4 plate and has a patterned optical anisotropic layer; and a second phase difference plate which is a λ/4 plate and has a patterned optical anisotropic layer, in which the patterned optical anisotropic layers have a constant phase difference and are divided into a plurality of belt-like regions in the same plane, directions of slow axes in one belt-like region match each other and directions of slow axes of belt-like regions adjacent to each other are different from each other in the patterned optical anisotropic layer, and the belt-like region of the first phase difference plate and the belt-like region of the second phase difference plate are disposed so as to intersect with each other in a plane direction. 1. A viewing angle control film comprising , in order:a first polarizer in which an absorption axis is in a direction perpendicular to a film surface;a first phase difference plate which is a λ/4 plate and has a patterned optical anisotropic layer; anda second phase difference plate which is a λ/4 plate and has a patterned optical anisotropic layer,wherein the patterned optical anisotropic layer of the first phase difference plate and the patterned optical anisotropic layer of the second phase difference plate each have a constant phase difference and are divided into a plurality of belt-like regions in the same plane,directions of slow axes in one belt-like region match each other and directions of slow axes of belt-like regions adjacent to each other are different from each other in each of the patterned optical anisotropic layer of the first phase difference plate and the patterned optical anisotropic layer of the second phase difference plate, andthe belt-like region of the patterned optical anisotropic layer of the first phase difference plate and the belt-like region ...

SYSTEMS AND METHODS FOR ALIGNMENT OF ANISOTROPIC INCLUSIONS IN ADDITIVE MANUFACTURING PROCESSES

Three-dimensional printing methods and systems use a derived geometry and aligns anisotropic inclusions in any orientation at any number of discrete volumetric sections. Structural, thermal, or geometry-based analyses are combined with inclusion alignment computations and print preparation methods and provided to 3D printers to produce composite material parts that meet demanding geometric needs as well as enhanced structural and thermal requirements. In one example, optimal inclusion alignment vectors associated with a section of the object are calculated based on specifications for the object, segmenting a three-dimensional model of the object into layer slices, grouping each section within each layer slice having similar alignment vectors and combining the groupings and generating printing instructions for the object according to the grouped alignment vectors. 1. A method for producing machine-readable instructions for manufacturing an object having anisotropic inclusions , the method comprising:receiving, from an object design application, a specification file describing the object as a three-dimensional model;defining a plurality of optimal inclusion alignment vectors, each inclusion alignment vector being associated with a daxel of the object and based at least in part on the specification file;segmenting the three-dimensional model into layer slices;grouping each daxel within each layer slice having substantially similar alignment vectors;combining the groupings into subdivided slices; andgenerating machine instructions directing a three-dimensional printer to manufacture the object having anisotropic inclusions aligned according to the grouped alignment vectors.2. The method of further comprising receiving results from a finite element analysis claim 1 , and wherein the optimal inclusion alignment vectors are further based on the received finite element analysis results.3. The method of further comprising receiving a predefined claim 1 , layer-specific set ...

OPTICAL TESTING APPARATUS

According to the present invention, an optical testing apparatus is used in testing an optical measuring instrument. The optical measuring instrument provides an incident light pulse from a light source to an incident object and receives a reflected light pulse as a result of reflection of the incident light pulse at the incident object. The optical testing apparatus includes a testing light source and a rise time control section. The testing light source is arranged to generate a testing light pulse to be provided to the optical measuring instrument. The rise time control section is arranged to control the rise time of the testing light pulse. 1. An optical testing apparatus used in testing an optical measuring instrument that provides an incident light pulse from a light source to an incident object and receives a reflected light pulse as a result of reflection of the incident light pulse at the incident object , the optical testing apparatus comprising:a testing light source arranged to generate a testing light pulse to be provided to the optical measuring instrument; anda rise time control section arranged to control the rise time of the testing light pulse.2. The optical testing apparatus according to claim 1 , whereinthe optical measuring instrument is a ToF sensor.3. The optical testing apparatus according to claim 1 , whereinthe rise time controlled by the rise time control section corresponds to the rise time of the reflected light pulse.4. The optical testing apparatus according to claim 1 , whereinthe rise time control section is an acousto-optical crystal.5. The optical testing apparatus according to claim 4 , further comprising a controlling electrical signal output section arranged to output a controlling electrical signal claim 4 , whereinthe rise time control section is arranged to control the rise time of the testing light pulse according to the controlling electrical signal.6. The optical testing apparatus according to claim 5 , whereinthe ...

ACOUSTO-OPTICAL TUNABLE FILTER ELEMENT

An acousto-optical filter element () is provided which has an acousto-optical crystal () having an acoustic signal transmitter (120) for generating acoustic signals in the acousto-optical crystal (). The acousto-optical crystal () is designed to selectively spatially deflect light of a target wavelength from an input light beam () entering into the acousto-optical crystal (), as a function of a high frequency applied to the acoustic signal transmitter (120), and to thereby produce a target light beam () having the target wavelength. In addition, the acousto-optical filter element () includes a spatial filter element () which is located in the target light beam () and is designed to selectively suppress the intensity of the target light beam () in a plane perpendicular to the propagation direction of the target light beam (). 1. An acousto-optical filter element comprising:an acousto-optical crystal having an acoustic signal transmitter for generating acoustic signals in the acousto-optical crystal, the acousto-optical crystal configured to selectively spatially deflect light of a target wavelength from an input light beam of a broadband coherent light source entering into the acousto-optical crystal, as a function of a high frequency applied to the acoustic signal transmitter, and to thereby produce a target light beam having a desired target wavelength; anda spatial filter element located in the target light beam, the spatial filter element configured to selectively suppress the intensity of a portion of the target light beam in a plane perpendicular to the propagation direction of the target light beam, the spatial filter element comprising a pinhole and a lens element, the pinhole cutting off unwanted side modes of a spatial transfer function of the target light beam.2. The acousto-optical filter element as claimed in claim 1 , the pinhole including at least one of the following apertures: a slit aperture claim 1 , a square aperture claim 1 , a rectangular ...

WEARABLE DISPLAY DEVICE

A wearable display device includes a display panel an eyepiece and an optical element that is disposed between the display panel and the eyepiece in which the optical element includes an optically-anisotropic layer that is formed of a cured layer of a composition including a liquid crystal compound and the optically-anisotropic layer has a liquid crystal alignment pattern AP in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating along at least one in-plane direction of the optically-anisotropic layer 1. A wearable display device comprising:a display panel that includes a plurality of pixels and a pixel grid disposed between the plurality of pixels adjacent to each other;an eyepiece for collecting light emitted from the display panel through the plurality of pixels; andan optical element that is disposed between the display panel and the eyepiece,wherein the optical element includes an optically-anisotropic layer that is formed of a cured layer of a composition including a liquid crystal compound, andthe optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating along at least one in-plane direction of the optically-anisotropic layer.2. The wearable display device according to claim 1 ,{'sub': '550', 'claim-text': {'br': None, 'i': n', '×d≤, 'sub': '550', '50nm≤Δ350nm\u2003\u2003(1).'}, 'wherein in a case where a difference in refractive index generated by refractive index anisotropy of the liquid crystal compound at a wavelength of 550 nm is represented by Δnand a thickness of the optically-anisotropic layer is represented by d, the following Expression (1) is satisfied,'}3. The wearable display device according to claim 1 ,{'sub': 450', '550, 'claim-text': {'br': None, 'i': n', '×d', 'n', '×d, 'sub': 450', '550, '(Δ)/(Δ)<1.00\u2003\u2003(2).'}, 'wherein in a case where a difference ...

TUNABLE WAVELENGTH ILLUMINATION SYSTEM

A lithographic apparatus comprises an alignment system including a tunable narrow pass-band filter configured to receive a broad-band radiation and to filter the broad-band radiation into narrow-band linearly polarized radiation. The tunable narrow pass-band filter is further configured to modulate an intensity and wavelength of the narrow-band radiation and to provide a plurality of pass-band filters at a same time or nearly the same time. The alignment system further includes a relay and mechanical interface configured to receive the narrow-band radiation and to adjust a profile of the narrow-band radiation based on physical properties of alignment targets on a substrate. The adjusted narrow-band radiation is focused on the alignment targets using a focusing system.

Microscope with an acousto-optical device

The invention relates to a microscope having an acousto-optic apparatus ( 13 ) that, with a mechanical wave that is characterized by a preferably adjustable frequency, removes from a polychromatic and collinear detected light bundle ( 18 ) portions of illuminated light, scattered and/or reflected at a sample, having an illuminating light wavelength associated with the frequency. The microscope is notable for the fact that a crystal ( 30 ) of the acousto-optic apparatus in which the mechanical wave propagates, and the propagation direction of the mechanical wave, are oriented relative to the detected light bundle incident into the crystal in such a way that the acousto-optic apparatus deflects, with the mechanical wave, both the portion of the detected light bundle having the illuminating wavelength and a first linear polarization direction, and the portion of the detected light bundle having the illuminating wavelength and a second linear polarization direction perpendicular to the first polarization direction, and thereby removes them from the detected light bundle.

OPTICAL LAMINATE, LIGHT GUIDE ELEMENT, AND AR DISPLAY DEVICE

Provided are an optical laminate in which a large diffraction angle can be obtained, a light guide element, and an AR display device. The optical laminate includes, in the following order: a first optically-anisotropic layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction; a cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase; and a second optically-anisotropic layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction, in which in the first optically-anisotropic layer and the second optically-anisotropic layer, the one in-plane directions in which the direction of the optical axis derived from the liquid crystal compound continuously rotates are the same, and rotation directions of the direction of the optical axis derived from the liquid crystal compound in the one in-plane direction are the same. 1. An optical laminate comprising , in the following order:a first optically-anisotropic layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction;a cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase; anda second optically-anisotropic layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in- ...

OPTICAL LAMINATE, LIGHT GUIDE ELEMENT, AND AR DISPLAY DEVICE

Provided are an optical laminate in which a large diffraction angle can be obtained, a light guide element, and an AR display device. The optical laminate includes, in the following order: a first optically-anisotropic layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction; a phase difference layer; and a patterned cholesteric liquid crystal layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction, the liquid crystal compound being cholesterically aligned, in which in the first optically-anisotropic layer and the patterned cholesteric liquid crystal layer, the one in-plane directions in which the direction of the optical axis derived from the liquid crystal compound continuously rotates are the same, and rotation directions of the direction of the optical axis derived from the liquid crystal compound in the one in-plane direction are the same. 1. An optical laminate comprising , in the following order:a first optically-anisotropic layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction;a phase difference layer; anda patterned cholesteric liquid crystal layer that is formed of a composition including a liquid crystal compound and has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction, the liquid crystal compound being cholesterically aligned,wherein in the first ...

SCANNING MICROSCOPE AND ACOUSTO-OPTICAL MAIN BEAM SPLITTER FOR A SCANNING MICROSCOPE

The invention relates to an acousto-optic main beam splitter for a scanning microscope, which is embodied and intended to direct illuminating light having a preselected or preselectable illuminating light wavelength into an illumination beam path for illumination of a sample, and to direct detected light coming from a sample into a detection beam path. The acousto-optic main beam splitter is characterized in that a mechanical wave having an acoustic frequency associated with the illuminating light wavelength propagates, or multiple mechanical waves that have the same acoustic frequency associated with the illuminating light wavelength propagate, in the acousto-optic main beam splitter, both a portion of the detected light bundle having the illuminating light wavelength and a first linear polarization direction, and a portion of the detected light having the illuminating light wavelength and a second linear polarization direction perpendicular to the first linear polarization direction, being deflected out of the detected light bundle coming from a sample by interaction with the one mechanical wave or by interaction with the mechanical waves, and are thereby removed from the detected light bundle; and/or the acousto-optic main beam splitter being embodied to direct, by interaction with the one mechanical wave or by interaction with the mechanical waves, both the portion of illuminating light that has the preselected illuminating light wavelength and a first linear polarization direction, and the portion of illuminating light that has the preselected illuminating light wavelength and a second linear polarization direction that is different from, in particular perpendicular to, the first linear polarization direction, into an illumination beam path for illumination of a sample. 1. An acousto-optic main beam splitter for a scanning microscope , which is embodied and intended to direct illuminating light having a preselected or preselectable illuminating light wavelength ...

PHOTO-ALIGNMENT APPARATUS THAT REALIZES DESIRABLE DISTRIBUTION THROUGH SINGLE EXPOSURE AND METHOD OF MANUFACTURING AN OPTICAL ELEMENT

The present invention discloses a photo-alignment apparatus that realizes a desirable distribution through a single exposure and a method of manufacturing an optical element. The photo-alignment apparatus comprises a light source, a linear polarization film, a pixelated electronic-control phase retarder, and a phase retardation plate; the light source is used to provide light for a exposure; the linear polarization film is configured to convert the light emitted by the light source into a linearly-polarized light having a polarization direction parallel to the direction of the transmission axis of the linear polarization film; the pixelated electronic-control phase retarder is configured to generate phase retardations distributed in a desirable pattern; and the phase retardation plate is used to generate a non-pixelated phase retardation. With this photo-alignment apparatus, a polarization distribution of a desirable pattern can be generated, and a corresponding alignment profile can be formed on a polarization sensitive medium. 1. A photo-alignment apparatus comprising:a light source, configured to provide first light;a linear polarization film, configured to receive the first light from the light source and convert the first light into second light, which is linearly-polarized light having a polarization direction parallel to a direction of a transmission axis of the linear polarization film;a pixelated electronic-control phase retarder, including pixels which are respectively controlled by corresponding voltages to provide predetermined phase retardations to the second light on a pixel level, the pixelated electronic-control phase retarder is configured to convert the second light into a plurality of beams of third light having polarization states respectively corresponding to the predetermined phase retardations; anda phase retardation plate, configured to provide a non-pixelated phase retardation to the third light and output a plurality of beams of fourth ...

Device and method for multispot scanning microscopy

The invention relates to a device for multispot scanning microscopy, having a multicolour light source for providing at least one illumination light beam, having a splitting device for splitting the illumination light beam into a plurality of illumination sub-beams, having first optical means for providing an illumination optical path for guiding and focussing the individual illumination sub-beams respectively into a light spot on or in a specimen to be examined, having a scan unit for guiding the light spots over the probe, having a detection unit for detecting detection light emitted by the specimen in detection sub-beams after irradiation with the individual illumination sub-beams, having second optical means for providing a detection optical path for guiding the detection sub-beams to the detector unit, having a control and evaluation unit for controlling the scan unit and for evaluating the detection light detected by the detection unit. The device is characterised in that in the illumination optical path for at least two of the illumination sub-beams a controllable beam manipulation means is present for independent setting of a spectral composition of the respective illumination sub-beam, and the control and evaluation unit is designed to control the beam manipulation means. The invention further relates to a method for multispot scanning microscopy. 1. Device for multispot scanning microscopy ,{'b': 10', '18, 'having a multicolour light source () for providing at least one illumination light beam (),'}{'b': 16', '18', '11', '14, 'having a splitting device () for splitting the illumination light beam () into a plurality of illumination sub-beams (, . . . , ),'}{'b': 30', '11', '14', '41', '44', '40', '38', '41', '44', '40, 'having first optical means () for providing an illumination optical path for guiding and focussing the individual illumination sub-beams (, . . . , ) respectively into a light spot (, . . . , ) on or in a specimen () to be examined, having ...

Method and Apparatus for Actuating an Acousto-Optical Component

A method and apparatus for actuating an acousto-optical component for manipulating light passing therethrough, in particular for manipulating the illumination and/or detection light in the beam path of a microscope, preferably a laser scanning microscope, where the illumination and/or detection wavelength is adjusted by means of at least one frequency generator connected to the acousto-optical component and controlling the manipulation, the frequency generator generates a signal which generates a spectral spread for the intensity distribution of the wavelength of the illumination and/or detection light for ensuring a temperature-independent manipulation. Actuation is effected by two or more actuation signals in such a way that two or more overlapping and/or superposing main lobes of the transfer function of the acousto-optical component or main maxima are generated. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. (canceled)23. (canceled)24. (canceled)25. (canceled)26. (canceled)27. (canceled)28. (canceled)29. (canceled)30. (canceled)31. (canceled)32. An apparatus for actuating an acousto-optical component for manipulating laser light passing through the acousto-optical component as illumination light and/or detection light of a microscope in the form of a pulse of a laser system with a spectral width or a laser line with a specific wavelength , comprisinga) said acousto-optical component having a transfer function which describes a relationship between the spectral properties of the acousto-optical component and a spectral characteristic of the laser light to be transferred, andb) at least one frequency generator for adjusting an illumination wavelength of the illumination light and/or a detection wavelength of the detection ...

ADDITIVE MANUFACTURING SYSTEMS AND METHODS FOR NON-PLANAR INTERFACES BETWEEN LAYERS

Three-dimensional printing methods and systems use a derived geometry and aligns anisotropic inclusions in any orientation at any number of discrete volumetric sections. Structural, thermal, or geometry-based analyses are combined with inclusion alignment computations and print preparation methods and provided to 3D printers to produce composite material parts that meet demanding geometric needs as well as enhanced structural and thermal requirements. In one example, optimal inclusion alignment vectors associated with a section of the object are calculated based on specifications for the object, segmenting a three-dimensional model of the object into layer slices, grouping each section within each layer slice having similar alignment vectors and combining the groupings and generating printing instructions for the object according to the grouped alignment vectors. 128.-. (canceled)29. A method for additive manufacturing of an object , the method comprising:receiving a specification file describing the object as a three-dimensional model, the three-dimensional model comprising a plurality of layer slices of the object;introducing a three-dimensional geometric interface between layer slices that provides for a non-planar interface between adjacent layer slices; andsequentially printing the layer slices using an additive manufacturing apparatus thereby formulating the object.30. The method of wherein at least a subset of adjacent layer slices are subdivided into complementing sets of images having patterned extruded overlays.31. The method of wherein the subdivided sets of images are defined as having a fractional layer thickness of a nominal layer height.32. The method of wherein the fractional layer thickness is one of half of the nominal layer height claim 31 , one third of the nominal layer height or one quarter of the nominal layer height.33. The method of further comprising polymerizing each fractional layer in alternating fashion.34. The method of wherein the ...

ACOUSTO-OPTIC INTERACTIVE STRUCTURE

An acousto-optic structure according to an exemplary embodiment of the present invention is a stacked structure for inducing an interaction between incident acoustic wave and incident optical wave, and it includes: a pair of multi-layered structures including a structure in which two layers with different acoustic impedance and optical impedance are alternately arranged in a direction in which the acoustic wave and the optical wave propagate; and a cavity layer disposed between the pair of multi-layered structures in the direction in which the acoustic wave and the optical wave propagate, and made of a medium having acoustic impedance and optical impedance that are different from those of interfacing layers at both sides, wherein the two layers are symmetrically arranged with respect to the cavity layer so that the acoustic wave and the optical wave may be confined in the cavity layer. 1. An acousto-optic structure as a structure in which a plurality of layers are stacked so as to induce an interaction between an incident acoustic wave and an incident optical wave , comprising:a pair of multi-layered structures including a structure in which two layers with different acoustic impedance and optical impedance are alternately arranged in a direction in which the acoustic wave and the optical wave propagate; anda cavity layer disposed between the pair of multi-layered structures in the direction in which the acoustic wave and the optical wave propagate, and made of a medium having acoustic impedance and optical impedance that are different from those of interfacing layers at both sides,wherein the two layers are symmetrically arranged with respect to the cavity layer so that the acoustic wave and the optical wave may be confined in the cavity layer.2. The acousto-optic structure of claim 1 , whereinthe two layers include a first layer, and a second layer having acoustic impedance and optical impedance that are greater than those of the first layer, andthe pair of multi- ...

METHOD FOR ADJUSTING THE INTENSITY OF A LIGHT BEAM IN AN OPTICAL ARRANGEMENT AND ASSOCIATED OPTICAL ARRANGEMENT

A method for adjusting an intensity of a light beam in an optical arrangement includes passing the light beam through an acousto-optical tunable filter (AOTF). The intensity of the light beam is adjusted as a function of frequency and/or amplitude of a sound wave with which the AOTF is operated. The amplitude of the sound wave at a specified sound wave frequency is selected such that the amplitude is larger than would be required to achieve a first maximum diffraction efficiency for a specified wavelength or for a specified wavelength spectrum of the light beam. The amplitude of the sound wave is also selected such that a value of an integral of a product of the transmission function of the AOTF and the wavelength spectrum of the light beam is larger than at a value of the amplitude to be selected to achieve the first maximum. 1. A method for adjusting an intensity of a light beam in an optical arrangement , the method comprising:passing the light beam through an acousto-optical tunable filter (AOTF); andadjusting the intensity of the light beam as a function of at least one of frequency or amplitude of a sound wave with which the AOTF is operated,wherein the amplitude of the sound wave at a specified sound wave frequency is selected such that the amplitude is larger than would be required to achieve a first maximum diffraction efficiency for a specified wavelength or for a specified wavelength spectrum of the light beam, andwherein the amplitude of the sound wave is also selected such that a value of an integral of a product of the transmission function of the AOTF and the wavelength spectrum of the light beam is larger than at a value of the amplitude to be selected to achieve the first maximum.2. The method according to claim 1 , wherein a light source or light sources generating the light beam is or are selected or adjusted such that the wavelength spectrum of the generated light beam is wider than or as wide as the width of the wavelength-dependent transmission ...

OPTICAL ARRANGEMENT FOR PULSED ILLUMINATION, METHOD FOR PULSED ILLUMINATION AND MICROSCOPE

An optical arrangement has an optical beam path for illuminating a sample space with a sequence of laser light pulses generated in a laser cycle, the optical arrangement. At least one laser light source is configured to generate the sequence of laser light pulses along the optical beam path. A wavelength-selective pulse picker is situated in the optical beam path and has, in a predefined illumination clock timing synchronizable with the laser light pulses, an open state in which the pulse picker is light-transparent to at least one laser light pulse towards the sample space. The open state has at least two different transmission states which differ with regard to their respective transmission spectrums, and wherein the two transmission states are switchable on and/or off independently of one another. 1. An optical arrangement having an optical beam path for illuminating a sample space with a sequence of laser light pulses generated in a laser cycle , the optical arrangement comprising:at least one laser light source configured to generate the sequence of laser light pulses along the optical beam path; anda wavelength-selective pulse picker situated in the optical beam path and having, in a predefined illumination clock timing synchronizable with the laser light pulses, an open state in which the pulse picker is light-transparent to at least one laser light pulse towards the sample space,wherein the open state has at least two different transmission states which differ with regard to their respective transmission spectrums, and wherein the two transmission states are switchable on and/or off independently of one another.2. The optical arrangement according to claim 1 , wherein the pulse picker has at least three different transmission states claim 1 , which are switchable independently of one another.3. The optical arrangement according to claim 1 , wherein the pulse picker has an electro-optical element.4. The optical arrangement according to claim 1 , wherein the ...

OPTICAL ELEMENT AND LIGHT GUIDE ELEMENT

An object is to provide an optical element in which a wavelength dependence of refraction of transmitted light is small, and a light guide element including the optical element. The optical element includes: plurality of optically-anisotropic layers that are formed using a composition including a liquid crystal compound and have a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in one in-plane direction; and a wavelength selective phase difference layer that is disposed between two optically-anisotropic layers and converts circularly polarized light in a specific wavelength range into circularly polarized light having an opposite turning direction, in which, in a case where, in the liquid crystal alignment pattern, a length over which the direction of the optical axis rotates by 180° in the in-plane direction in which the direction of the optical axis changes is set as a single period, a length of the single period in at least one optically-anisotropic layer is different from that of another optically-anisotropic layer. 1. An optical element comprising:a plurality of optically-anisotropic layers that are formed using a composition including a liquid crystal compound and have a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction; anda wavelength selective phase difference layer that is disposed between at least one pair of two optically-anisotropic layers adjacent to each other among the plurality of optically-anisotropic layers and converts circularly polarized light in a specific wavelength range into circularly polarized light having an opposite turning direction,wherein, in a case where, in the liquid crystal alignment pattern of the optically-anisotropic layer, a length over which the direction of the optical axis derived from the liquid crystal ...

ANALYZING MICROTEXTURED REGIONS OF OPTICALLY ANISOTROPIC MATERIALS

Images of samples that are illuminated with polarized light are captured. Azimuth and inclination data are extracted from the captured images. The azimuth and inclination data are used to quantify MTRs. 1. A system comprising:a light source for emitting substantially monochromatic light;a linear polarizer having a first polarization axis, the linear polarizer for receiving the emitted light and producing a linearly polarized light from the received light;a beam splitter for receiving the linearly polarized light and redirecting the received light;an objective lens for receiving the redirected light and focusing the redirected light onto a sample, the sample having an optical anisotropy, the objective lens further for receiving a reflected light from the sample and propagating the reflected light to the beam splitter, the reflected light being a function of the optical anisotropy;an analyzer having a second polarization axis, the second polarization axis being generally orthogonal to the first polarization axis, the analyzer for receiving the propagated reflected light from the beam splitter and producing a partially extinguished light, the partially extinguished light being a function of the first polarization axis, the second polarization axis, and the optical anisotropy of the sample;a camera to capture an image sequence of the partially extinguished light; and flat-field correcting the captured image sequence;', 'performing image rotation and image registration;', 'extracting an intensity response at each pixel of the captured image;', 'extracting an amplitude value for the intensity response at each pixel of the captured image sequence;', 'extracting a phase value for the intensity response at each pixel of the captured image sequence;', 'correlating the amplitude with an inclination of an optic axis;', 'correlating the phase with an azimuth of the optic axis; and', 'quantifying microstructured regions (MTRs) using the inclination and azimuth., 'a processing ...

OPTICAL INSTRUMENT AND METHOD FOR DETERMINING A WAVELENGTH OF LIGHT GENERATED BY A LIGHT SOURCE, AND OPTICAL SYSTEM COMPRISING THE OPTICAL INSTRUMENT

The invention refers to an optical instrument for determining a wavelength of light generated by a light source, comprising a signal generator for generating a modulation signal, a tunable optical filter device configured to receive the modulation signal, the tunable optical filter device configured to modulate the light generated by the light source based on the modulation signal, an optical detector device configured to detect a degree of modulation of light modulated by the tunable optical filter device, and an analyser configured to determine the wavelength of the light based the degree of modulation.

A method preparing an optical anisotropic film with high heat resistance and a film prepared by the same, and a liquid crystal display device comprising the film

본 발명은 내열성이 우수한 광학 이방성 필름, 바람직하게는 내열성 및 내충격성이 우수한 (+) C-플레이트(positive C-plate)형 광학 이방성 필름 제조방법 및 그에 의해 제조된 필름, 및 그 필름을 포함하는 액정 디스플레이 장치, 보다 상세하게는, (메타)아크릴레이트 단량체, 스티렌-무수말레인산계 공중합체 및 중합 개시제를 포함하는 중합용 조성물을 도포한 뒤 중합하여 무연신 필름을 제조하는 단계; 및 상기 무연신 필름을 일축 또는 이축연신하는 단계를 포함하는 광학 이방성 필름의 제조방법 및 그에 의해 제조된 필름, 및 그 필름을 포함하는 액정 디스플레이 장치에 관한 것으로, 본 발명에 따르면, 투명성, 내열성 및 내충격성이 우수한 광학 이방성 필름을 저렴하게 제조할 수 있으며, 특히 본 발명에 따라 제조된 (+) C-플레이트(positive C-plate)형 광학 이방성 필름은 광시야각에서의 선명한 화질 및 높은 콘트라스트 비를 얻게 할 수 있기 때문에 광학 보상 필름으로서 IPS 모드의 액정 디스플레이에 적합하게 사용될 수 있다. The present invention provides an optically anisotropic film having excellent heat resistance, preferably a positive C-plate type optically anisotropic film having excellent heat resistance and impact resistance, and a film prepared thereby, and a film Preparing a non-stretched film by coating a polymerization composition including a liquid crystal display device, more specifically, a (meth) acrylate monomer, a styrene-maleic anhydride-based copolymer, and a polymerization initiator; And it relates to a method for producing an optically anisotropic film comprising the step of uniaxially or biaxially stretching the non-stretched film, and a film produced by the same, and a liquid crystal display device comprising the film, according to the present invention, transparency, heat resistance and The optically anisotropic film excellent in impact resistance can be produced at low cost, and the (+) C-plate type optically anisotropic film prepared according to the present invention has a sharp image quality and high contrast ratio at a wide viewing angle. Since it can obtain, it can be used suitably for the liquid crystal display of IPS mode as an optical compensation film. 보상 필름, 위상차, (+) C-플레이트, (메타)아크릴레이트 단량체, 스티렌-무수말레인산계 공중합체, 탄성체, 내열성, 내충격성, 투명성, 굴절률, 액정 디스플레이, IPS 모드 Compensation film, retardation, (+) C-plate, (meth) acrylate monomer, styrene-maleic anhydride copolymer, elastomer, heat resistance, impact resistance, transparency, refractive ...

광학적으로 등방성인 액정혼합물과 수직 전기장을 이용한 시야각 스위칭 액정 표시 소자

본 발명은 전기장에 의해 광학적으로 등방성에서 비등방성으로 변화하는 양의 유전율 이방성을 가진 액정을 이용한 시야각 조절 액정표시소자에 관한 것으로, 추가적인 패널 없이 하나의 패널에 각각 수평방향 전기장을 이용하는 메인 이미지를 표현하는 영역과 수직방향 전기장을 이용하는 시야각을 조절하는 영역을 나누어 시야각 조절이 가능하게 한 액정 표시 소자에 관한 것이다. 광학적 등방성, 광학적 비등방성, 액정표시소자, 시야각 조절.

Viewing angle control method of the fringe-field switching liquid crystal display

본 발명은 프린즈필드스위칭(FFS:Fringe-Field Switching) 모드를 이용한 시야각 조절에 관한 것으로, 일반적인 FFS 전극과 시야각 조절용 전극을 따로 패턴 하는 방식을 적용하였다. 전극 구조에 있어서 하부기판 전면에 제1 공통전극을 형성시키고, 그 위에 절연막을 덮고, 절연막 위에 서로 나란한 다수의 제1 화소 전극을 기판의 일부 영역까지 패턴 시키고 나머지 영역은 통 전극으로 제 2 화소 전극을 패턴 시킨다. 하부기판과 마주 보도록 상부 기판이 대응되어 있고, 이 기판의 제 2화소전극과 마주보고 있는 일부 영역에 제2 공통전극을 형성시킨다. 이러한 액정 표시장치의 제 1 공통전극과 제 2 공통전극에 같은 크기의 일정한 전압을 인가시키고, 제 1 화소 전극에 전압을 다양하게 인가함으로써 제 1 공통전극과 제 1 화소전극의 전압차에 의해 생기는 프린즈 전기장에 의해 액정 디스플레이를 구현하고, 제 2화소전극에 전압을 조절함으로써 제 2 화소 전극과 제 2 공통전극의 전압 차에 의해 생기는 수직전기장에 의해 광시야각 또는 협소한 시야각을 적절히 조절할 수 있다. The present invention relates to a viewing angle control using a Prince-Field Switching (FFS) mode, and a method of patterning a general FFS electrode and a viewing angle control electrode separately is applied. In the electrode structure, a first common electrode is formed on an entire surface of a lower substrate, an insulating layer is covered thereon, and a plurality of first pixel electrodes parallel to each other are patterned to a partial region of the substrate, and the remaining regions are cylindrical electrodes, and the second pixel electrode Pattern. An upper substrate is formed to face the lower substrate, and a second common electrode is formed in a portion of the substrate facing the second pixel electrode. By applying a constant voltage of the same magnitude to the first common electrode and the second common electrode of the liquid crystal display device and applying a different voltage to the first pixel electrode, the voltage generated between the first common electrode and the first pixel electrode is generated. By implementing a liquid crystal display by a Prince electric field and by adjusting the voltage on the second pixel electrode, a wide viewing angle or a narrow viewing angle can be appropriately adjusted by the vertical electric field generated by the voltage difference between the second pixel electrode and the second common electrode. fringe-field switching, 광시야각, 협소한 시야각 fringe-field ...

Acousto-optical tunable filter

FIELD: optics; instrument engineering. SUBSTANCE: invention relates to acousto-optical tunable filter. Filter includes polariser, acousto-optical cell, analyser, beam splitter, photodetector, feedback electric circuit and radio-frequency generator. Acousto-optical cell provides collinear mode of diffraction with scattering radiation simultaneously in several diffraction orders. At analyser outlet interference of +1, -1 and 0 diffraction maxima is carried out. Feedback circuit links photodetector and piezoelectric transducer of cell. Radio-frequency generator is designed to control amplitude and frequency of generation signal and control position and width of filter passband. EFFECT: reduced passband and possibility to control width and position of the passband. 1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 585 802 C1 (51) МПК G02F 1/11 (2006.01) G01J 3/18 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2015102552/28, 28.01.2015 (24) Дата начала отсчета срока действия патента: 28.01.2015 (73) Патентообладатель(и): Общество с ограниченной ответственностью "Спектроптэл" (ООО "Спектроптэл") (RU) (45) Опубликовано: 10.06.2016 Бюл. № 16 C 1 2 5 8 5 8 0 2 R U (54) АКУСТООПТИЧЕСКИЙ ПЕРЕСТРАИВАЕМЫЙ ФИЛЬТР (57) Реферат: Изобретение относится к области оптического обратной связи связывает фотоприемное приборостроения и касается акустооптического устройство и пьезоэлектрический перестраиваемого фильтра. Фильтр включает в преобразователь ячейки. Радиочастотный себя поляризатор, акустооптическую ячейку, генератор выполнен с возможностью управления анализатор, светоделитель, фотоприемное амплитудой и частотой сигнала генерации и устройство, цепь электрической обратной связи предназначен для управления положением и и радиочастотный генератор. Акустооптическая шириной полосы пропускания фильтра. ячейка обеспечивает коллинеарный режим Технический результат заключается в уменьшении дифракции с рассеянием ...

Wavelength-Selectable Laser Oscillators in Tunable Lasers

본 발명의 목적은 파장 선택가능 레이저 오실레이트를 실행하는 경우에 있어서 굴절율을 분명하게 높임으로써, 레이저의 펄스반복속도가 종래의 것과 비교하여 분명하게 증가될 수 있고, 게다가 여기입력이 감소될 수 있으며, 또한 파장튜닝속도를 촉진할 수 있는 파장 가변 레이저에서의 파장 선택가능 레이저 오실레이터를 제공함에 있다. 본 발명에 따른 파장 가변 레이저에서의 파장 선택가능 레이저 오실레이터는, 규정된 반사율을 각각 갖는 대향미러로 구성된 레이저 공진기와; 레이저 공진기에 배치되고 규정됨 범위의 파장대에서의 레이저 오실레이션이 가능한 파장 가변 레이저매체; 레이저 오실레이터에 배치되고 파장 가변 레이저매체로부터 방출된 광이 입력되는 음향-광학 크리스탈; 음향-강학 크리스탈상에 장착되고 음향-광학 크리스탈에 음파를 입력하기 위한 음파입력수단; 레이저 공진기에 배치되고 음향-광학 크리스탈로부터 출력된 회절광의 분산을 정정하기 위한 광학소자 및; 여기 레이저빔을 레이저 공진기로 입력하기 위한 펄스 여기 레이저를 구비한 것을 특징으로 한다.

Method for measuring optical anisotropy parameter and measurement apparatus

이방성의 작은 측정 대상물에서도 시료 스테이지나 시료의 미세 패턴에 의한 산란광의 영향을 받지 않고, SMP법과 동일한 수법으로, 고정밀도로 광학이방성 패러미터를 간단하게 측정할 수 있는 차동 SMP법을 제안한다. A differential SMP method which can easily measure the optical anisotropy parameter with high precision by the same method as that of the SMP method without being influenced by the scattered light due to the sample stage or the fine pattern of the sample even in a small anisotropic measurement object is proposed. 측정 대상물(2)의 측정면에 대하여 P편광 또는 S편광의 어느 일방을 기준 방향으로 하고, 입사광과 측정광의 일방을 기준 방향으로 진동하는 직선 편광으로 하고, 입사광과 측정광의 타방을 기준 방향에 대하여 ±δ(δ≠nπ/2, n은 정수)의 방향으로 진동하는 1쌍의 직선 편광으로 하고, 그 1쌍의 직선 편광에 대응하는 2종류의 측정광의 광 강도를 측정하고, 얻어진 2개의 광 강도 데이터의 차분을 나타내는 차분 데이터에 기초하여 광학이방성 패러미터를 측정하도록 했다. One of the P-polarized light and the S-polarized light is set as the reference direction with respect to the measurement surface of the measurement object 2, one of the incident light and the measurement light is linearly polarized light vibrating in the reference direction, and the other of the incident light and the measurement light, And the pair of linearly polarized lights that oscillate in the direction of ± δ (δ ≠ n π / 2, n is an integer), and the light intensity of the two types of measurement light corresponding to the pair of linearly polarized lights is measured. And the optical anisotropy parameter is measured based on the differential data representing the difference of the intensity data. 직선 편광, 입사광, 이방성 측정 대상, 반사광, 측정광, 광학이방성 패러미터, 광학이방성 패러미터 측정 방법, 광 강도, 광학이방성 패러미터 측정 장치 Linear polarization, incident light, anisotropic measurement object, reflected light, measurement light, optical anisotropy parameter, optical anisotropy parameter measurement method, light intensity, optical anisotropy parameter measurement device

Acoustooptical tunable filter

FIELD: integrated and fiber optics. SUBSTANCE: given acoustooptical tunable filter can be employed for frequency channeling of signals in fiber-optical communication systems and as small-sized tunable optical spectrometer. Acoustooptical tunable filter is planar optical waveguide with acoustooptical cell in which or close to which elements forming and/or selecting optical beams in the form of two strip optical waveguides and set of elementary reflectors overlapping apertures of proper strip optical waveguides through which incident and output beams correspondingly pass are produced. Angle of inclination of elementary reflectors of forming element is chosen on condition that specular beams are directed at Bragg angle for incident wave. Angle of inclination of elementary reflectors of selecting element is chosen on condition that specular light beams going out of strip waveguide are directed at Bragg angle for diffracted light wave of acoustooptical cell. To secure passage of deviated diffracted beam alone through output strip waveguide relative angle of inclination of specular beams of forming and selecting elements is chosen greater than angle of diffraction divergence of light beams reflected from elementary reflectors. Positions of elementary reflectors are chosen such that directions of propagation of one of order of interference from various elementary reflectors correspondingly match directions specified by specular beams passing from strip optical waveguides to planar optical waveguide on central length of wave of optical radiation of tunable filter. For better suppression of spurious signals outside bandwidth of filter elementary reflectors are chosen with variable reflection factors and elementary reflectors of forming and/or selecting elements are displaced relative to periodic positions in order to expand band of delay of signals outside bandwidth of filter. EFFECT: development of acoustooptical tunable filter with minimal dimensions, narrow line of ...

Wavelength selectable laser oscillator for tunable laser

Microscope and microscopy

Waveguide-type polarization-independent light tunable filter

PROGRAMMABLE ACOUSTO-OPTICAL DEVICE FOR CONTROLLING THE AMPLITUDE OF SPECTRUM IN WAVELENGTHS OF WAVELENGTH MULTIPLEX OPTICAL COMMUNICATION SYSTEMS

Patent FR2160538A1

GENERATOR AND METHOD FOR GENERATING OPTICAL PULSES LOWER THAN INFRARED OPTICAL CYCLE.

Générateur d'impulsions optiques de durée inférieure au cycle optique dans l'infrarouge, constitué d'un premier dispositif D1 suivi d'un premier bras B1 et d'un deuxième bras B2, lequel comprend un deuxième dispositif D2 puis un troisième dispositif D3 ; le premier bras B 1 comprend un premier disperseur S1, suivi d'un premier non-linéariseur NL1, suivi d'un deuxième non-linéariseur NL2, suivi d'un quatrième dispositif D4, suivi d'un troisième non-linéariseur NL3, puis d'un deuxième disperseur S2. An optical pulse generator of shorter duration than the optical cycle in the infrared, consisting of a first device D1 followed by a first arm B1 and a second arm B2, which comprises a second device D2 and a third device D3; the first arm B 1 comprises a first disperser S1, followed by a first non-linearizer NL1, followed by a second non-linearizer NL2, followed by a fourth device D4, followed by a third non-linearizer NL3, then a second disperser S2.

SYSTEM FOR GENERATING SHORT OPTICAL PULSES LOWER THAN THE PERIOD OF THE OPTICAL CARRIER USING THE PRINCIPLE OF PARAMETRIC AMPLIFICATION.

Générateur d'impulsions optiques courtes comprenant : - un générateur (P, B1) d'impulsions optiques de longueur d'onde égale à λ/2 et d'une largeur spectrale inférieure à λ/3 ; - un générateur (P, B2) d'impulsions optiques d'une durée inférieure à 10 picosecondes à une longueur d'onde X/3 ; - un dispositif (R1) recombinant les impulsions issues des générateurs ; - un dispositif d'amplification paramétrique (OPA1) recevant en entrée la sortie du dispositif recombinant ; - un filtre (F2) extrayant de la sortie du dispositif d'amplification une bande centrée à une longueur d'onde λ ; - un générateur de second harmonique (SH) recevant la sortie du filtre (F2) et générant une bande centrée sur une longueur d'onde λ/2 ; - un dispositif programmable (DCDP2) permettant d'ajuster temporellement les impulsions correspondant auxdites bandes, pour permettre la génération d'une impulsion de longueur d'onde égale à λ/3 et de durée inférieure à la période du cycle optique. A short optical pulse generator comprising: - a generator (P, B1) of optical pulses having a wavelength equal to λ / 2 and a spectral width less than λ / 3; a generator (P, B2) of optical pulses with a duration of less than 10 picoseconds at a wavelength λ / 3; a device (R1) recombining the pulses from the generators; a parametric amplification device (OPA1) receiving as input the output of the recombinant device; a filter (F2) extracting from the output of the amplification device a band centered at a wavelength λ; a second harmonic generator (SH) receiving the output of the filter (F2) and generating a band centered on a wavelength λ / 2; - A programmable device (DCDP2) for temporally adjusting the pulses corresponding to said bands, to allow the generation of a pulse wavelength equal to λ / 3 and shorter than the period of the optical cycle.

808nm wave band free space acousto-optic polarization control systems

本发明涉及一种808nm波段自由空间声光偏振控制系统，包括相互连接的一个超声驱动源与一个声光偏振控制器；所述超声驱动源包括依次连接的一个控制输入、一个振荡电路及一个放大电路，所述声光偏振控制器包括一个压电换能单元，所述压电换能单元包括一个顶电极、一个底电极、一个压电晶片及一个键合层，所述顶电极、底电极分别镀在所述压电晶片的两端且分别与一个阻抗匹配网络的输出端连接，所述压电换能单元通过所述键合层与一个各向同性的声光介质形成机械连接，所述声光介质的末端设置有一个声吸收体。本发明可以连续控制出射光的偏振椭圆度，得到所需要的偏振态。

Serial imager for birefringent detector acoustic imaging systems

A computer-readable signal bearing medium ( 10 ) has components ( 11, 21, 31 ) which act via a data processor ( 86 ) in an imaging system having an acoustic energy source ( 81 ) and a birefringent detector ( 84, 70 ) to record first data ( 14 ) from a first portion ( 61 ) of an object ( 60 ), the first portion attenuating first acoustic energy ( 12 ) at least part way to a first attenuation maximum ( 13, 43 ) along a first acousto-optic response ( 41 ) of the birefringent detector; to record second data ( 24 ) from a second portion ( 62 ) of the object, the second portion attenuating second acoustic energy ( 22 ) at least part way to a second attenuation maximum ( 23, 53 ) along a second acousto-optic response ( 51 ) of the birefringent detector; combines the data ( 32 ), and outputs a result.

Patent FR2160538B1

Control method and device for optical filter

The present invention relates to a control method and device for an optical filter (24), and a primary object of the present invention is to achieve accurate tracking control of the optical filter. Disclosed herein is a control method for an optical filter including first and second optical filter units (28) cascaded, each having an input and first and second outputs (48,49). The first output of the first optical filter unit is connected to the input of the second optical filter unit. First light output from the second output of the first optical filter unit is converted into a first electrical signal having a level corresponding to the power of the first light, and second light output from the second output of the second optical filter unit is converted into a second electrical signal having a level corresponding to the power of the second light. A control signal is generated according to the first and second electrical signals. Then, the first and second optical filter units are controlled according to the control signal. According to this method, accurate tracking control of the optical filter can be achieved.

Acoustically tuned optical filter system

Two crystals, made of acousto-optical material and having their respective extraordinary axes at a predetermined angle to each other, are acoustically excited; and, in combination with a polarizer and an analyzer, the acoustically excited crystals permit the complete transmission or rejection of a preselected narrow band of polarized light in the visible/infrared wavelength region.

Patent FR2118587A5

Agile spectral interferometric microscopy

An agile optical sensor based on spectrally agile heterodyne optical interferometric confocal microscopy implemented via an ultra-stable in-line acousto-optic tunable filter (AOTF) based interferometer using double anisotropic acousto-optic Bragg diffraction. One embodiment uses a tunable laser as the light source while other embodiments use a broadband source or a fixed wavelength laser as the source. One embodiment uses anisotropic diffractions in an AOTF to generate two near-collinear orthogonal linear polarization and slightly displaced beams that both pass via a test sample to deliver highly sensitive sample birefringence or material optical retardation measurements. A spherical lens is used to form focused spots for high resolution spatial sampling of the test object. The laser and AOTF tuning allows birefringence measurements taken at different wavelengths, one at a time. An alternate embodiment makes use of anisotropic diffractions in an acousto-optic deflector or Bragg cell instead of the wavelength tunable AOTF. The instrument also forms a classic interferometric confocal microscope via the use of single mode fiber optics or spatial filter pin-hole with a point photo-detector for the receive light. An alternate embodiment via a transmissive beam generation design provides collinear co-located beams on the sample plane for super-accurate measurements.

A miniaturized external cavity laser (ecl) implemented with acoustic optical tunable filter

An optical tunable laser design for the optical telecommunication industry is disclosed in this invention. This new design is economical, reliable, robust and with superior optical performances. The design offers broadband tunability, high output power, narrow laser line-width and high SMSR. And in addition, the tunable laser is distinguishable from conventional designs by the mere facts that there are no moving parts, therefore, making it very reliable, and the tuning method of this invention is non-thermal and non-mechanical making its tuning very fast in the sub-millisecond range. In the manufacturing front, it is low cost and easy to produce. It can be achieved with automation equipment like those used in the IC placement and PC assembly industry, therefore, the products as that disclosed in this invention can be provided with significantly reduced production costs and marketed with very competitive price.

Acousto-optic tunable filter

System and method for modulating and displaying optical effects

Devices and methods for multispot scanning microscopy

Acousto-optic devices

An acousto-optic module is provided, comprising a number of partially coupled optical resonators (305, 310) distributed within a dielectric medium (305) and at least one acoustic transducer (315) mounted on a surface of the dielectric medium for injecting an acoustic wave into the optical resonators (305, 310) so as to diffract light (325) passing therethrough by means of Bragg diffraction. This acousto-optic module has been applied in particular to an improved tuneable optical filter in which an acoustic shear wave is generated and which travels through the acousto-optic module in a direction substantially parallel with a polarised light signal passing therethrough. The acousto-optic module is also applied to an improved optical frequency shifter.

Grating assisted acousto-optic tunable filter and method

An acousto-optic tunable filter and filtering method are disclosed providing for a significantly increased number of available wavelength channels for output. The filter combines a diffraction grating, the grating vector of which is transverse to light propagation direction, with an acousto-optic beam deflector, which, by accommodating a narrow spectral bandwidth (about 5% that of conventional acousto-optic tunable filters), provides significantly increased output bandwidth and available wavelength channels (by a factor of approximately 20).

Wavelength tunable laser

Device and method for multispot scanning microscopy

Die Erfindung betrifft eine Vorrichtung zur Multispot-Scanning-Mikroskopie, mit einer mehrfarbigen Lichtquelle zum Bereitstellen von mindestens einem Beleuchtungslichtstrahl, mit einer Trenneinrichtung zum Auftrennen des Beleuchtungslichtstrahls in mehrere Beleuchtungsteilstrahlen, mit ersten Optikmitteln zum Bereitstellen eines Beleuchtungsstrahlengangs zum Leiten und Fokussieren der einzelnen Beleuchtungsteilstrahlen jeweils in einen Leuchtfleck auf oder in eine zu untersuchende Probe, mit einer Scaneinheit zum Führen der Leuchtflecke über die Probe, mit einer Detektionseinheit zum Nachweisen von Detektionslicht, welches die Probe in Detektionsteilstrahlen nach Bestrahlung mit den einzelnen Beleuchtungsteilstrahlen abstrahlt, mit zweiten Optikmitteln zum Bereitstellen eines Detektionsstrahlengangs zum Leiten der Detektionsteilstrahlen auf die Detektoreinheit, mit einer Steuer- und Auswerteeinheit zum Ansteuern der Scaneinheit und zum Auswerten des von der Detektionseinheit nachgewiesenen Detektionslichts. Die Vorrichtung ist dadurch gekennzeichnet dass im Beleuchtungsstrahlengang für mindestens zwei der Beleuchtungsteilstrahlen ein steuerbares Strahlmanipulationsmittel vorhanden ist zum unabhängigen Einstellen einer spektralen Zusammensetzung des jeweiligen Beleuchtungsteilstrahls und dass die Steuer- und Auswerteeinheit eingerichtet ist zum Ansteuern der Strahlmanipulationsmittel. Die Erfindung betrifft weiterhin ein Verfahren zur Multispot-Scanning-Mikroskopie. The invention relates to a device for multispot scanning microscopy, comprising a multicolor light source for providing at least one illumination light beam, with a separation device for separating the illumination light beam into a plurality of partial illumination beams, with first optical means for providing an illumination beam path for guiding and focusing the individual illumination sub-beams respectively in FIG a light spot on or into a sample to be examined, with a scanning unit for guiding the ...

Programmable acousto-optic device

The invention concerns a device comprising a birefringent elasto-optic medium ( 1 ) equipped with a transducer ( 5 ) generating in the medium ( 1 ) a modulated acoustic wave along a specific direction, and means for coupling in the medium ( 1 ) an input optical wave with unknown polarisation, and a programming circuit for (amplitude-phase-frequency) modulation of the acoustic wave. Said device supplies a direct wave and two perpendicular diffracted waves of H, V polarisation each bearing a modulation based on the input optical wave modulation and the acoustic wave modulation.

Programmable acousto-optic device

The invention concerns a device comprising a birefringent elasto-optic medium (1) equipped with a transducer (5) generating in the medium (1) a modulated acoustic wave along a specific direction, and means for coupling in the medium (1) an input optical wave with unknown polarisation, and a programming circuit for (amplitude-phase-frequency) modulation of the acoustic wave. Said device supplies a direct wave and two perpendicular diffracted waves of H, V polarisation each bearing a modulation based on the input optical wave modulation and the acoustic wave modulation.

Wavelength selectable laser oscillator in wavelength tunable laser

An object of the present invention is to provide a wavelength selectable laser oscillator in wavelength tunable laser by which high- speed tuning of wavelength can be achieved while utilizing continuous- wave laser beam as the excited laser beam. The wavelength selectable laser oscillator in wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity on the outgoing side and a total reflection mirror which does not transmit light, but reflects the light; a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto-optical crystal disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means mounted on the acousto-optical crystal and for inputting an acoustic wave to the acousto-optical crystal; and a continuous- wave laser for inputting excited laser beam into the laser resonator; the laser beam outputted from the mirrors on the outgoing side being utilized as the outgoing laser beam from the laser resonator.

Multi channel acoustic-optic modulater

다채널 음향광 변조장치가 개시된다. 본 발명에 따르면, 서로 다른 파장을 가지는 3개의 레이저광을 발생시키는 레이저 광원부, 상기 광원부로부터 발생된 3개의 레이저광이 투과되는 매질로서 광입사면과 광출사면이 각각 입사광 및 출사광의 광축과 소정각도로 경사져 광투과방향에 평행한 종단면이 사다리꼴 형상을 가지는 음향광학매질, 상기 광입사면과 광출사면 상에 각각 형성된 반사방지막, 상기 각각의 레이저광에 대응하여 전기적 신호를 발생시키는 3개의 구동회로부, 상기 음향광학매질의 상면에 상호 이격 설치되는 것으로 상기 전기적 신호에 따라 각각 음향파를 발생시키는 3개의 전기-음향 변환기, 상기 레이저 광원부와 상기 음향광학매질의 광입사면 사이에 배치되는 것으로 상기 레이저 광원부로부터 발생된 광빔의 면적 및 형태를 변형시켜 상기 광입사면에 입사시키는 제1실린더형 렌즈, 상기 제1실린더형 렌즈에 대응하여 상기 음향광학매질의 광출사면 주위에 배치되는 것으로 상기 음향광학매질의 광출사면에서 출사되는 광빔의 면적 및 형태를 변형시키는 제2실린더형 렌즈 및 상기 제2실린더형 렌즈를 통과한 3개의 레이저광을 하나의 레이저광으로 합성하는 광합성부를 구비하는 다채널 음향광 변조장치가 제공된다. A multi-channel acoustic light modulator is disclosed. According to the present invention, a laser light source unit for generating three laser light having different wavelengths, the light incident surface and the light exit surface as a medium through which the three laser light generated from the light source is transmitted, respectively, the optical axis of the incident light and the output light and the predetermined An acoustic optical medium having a trapezoidal longitudinal cross section inclined at an angle and parallel to the light transmission direction, an antireflection film formed on the light incidence plane and the light exit plane, and three driving for generating an electrical signal corresponding to each of the laser beams A circuit unit and three electro-acoustic transducers which are spaced apart from each other on the upper surface of the acoustic optical medium and generate acoustic waves according to the electrical signal, and are disposed between the laser light source unit and the light incident surface of the acoustic optical medium. By modifying the area and shape of the light beam generated from the laser light source unit to enter the light incident surface A second cylinder that is arranged around the light exit surface of the acousto-optic medium to correspond to the first cylinder-type lens and the first cylinder-type lens to modify the ...

Acousto-optic tunable filter system which radiates a source light beam incident on a surface of the crystal filter body at an oblique angle

In a non-collinear type acousto-optic tunable filter, a source light beam is made off-perpendicularly incident on a crystal body, so that the cross section of the source light beam is narrowed within the crystal body. As a result, the receiving angular aperture becomes large to increase the amount of light collected into the crystal body. Consequently, highly accurate spectrometry can be performed even if the intensity of the source light beam is low. Further, the non-diffraction part of the crystal body can be eliminated by the off-perpendicular incidence of the source light beam, so that the sufficient diffraction length of acoustic and optic waves can be obtained.

Wide-light-spectrum acousto-optic adjustable light filter

本发明公开了一种宽光谱声光可调滤光器，包括声光介质、换能器、表电极，换能器由厚度互不相同的N个依次重叠构成，相邻两个换能器之间通过金属层紧密贴合在一起，最下层换能器通过键合层与声光介质通声面连接，表电极设于最上层换能器表面。第一匹配网络通过导线与表电极连通；第二匹配网络通过导线与键合层连通；其中一层金属层同时与第一匹配网络和第二匹配网络的地连通。本发明在声光介质的同一面上制作了由多个不同厚度的换能器构成的复合换能器，多个厚度不同的换能器组合在一起就能实现宽带电声转换功能，进而实现宽光谱滤光。可以减小声光介质的尺寸，进而减小声光可调滤光器体积和重量。

IMPROVEMENT ON PROGRAMMABLE ACOUSTO-OPTICAL DEVICES FOR OPTICAL COMMUNICATION SYSTEMS

Optical wavelength tunable filter

An acousto-optical tunable filter is disclosed. The filter includes a medium having one or more indices of refractions alterable by the application of acoustic waves to the medium. The filter also includes an acoustic transducer coupled to the medium to generate the acoustic waves Altering the frequency of the acoustic wave selects among the different wavelengths in the incident light ray. The device also includes an optical mirror for reflecting a wave diffracted by the medium back to the medium so that it can again be diffracted. The first diffracted wave has its frequency shifted in one direction by the frequency of the acoustic wave while the second diffracted wave has its frequency shifted in the opposite direction, thereby compensating for the first shift. The result is an output ray with little or no frequency shift.

Acousto-optical variable filter

An acousto-optical tunable filter, comprising planar optical waveguide ( 2 ) for propagation of light beam ( 14 ), and arranged sequentially along the path of the light radiation: a means for forming a light beam, transducer ( 16 ) of acoustic waves suited to generate acoustic wave ( 15 ) that is capable of interacting with the beam light waves and cause their diffraction within a predetermined wavelength range, and a means for selecting the diffracted portion of the light beam. The light beam forming means and selecting means are implemented in the form of stripe waveguides ( 3 ) and ( 4–7 ) respectively disposed in the plane of the planar waveguide and each provided with a set of unit reflectors ( 10 ) and ( 11 ) that overlap an aperture of corresponding stripe waveguide ( 3 ), the relative position and inclination angle of which reflectors being selected to maintain phase difference at the operating radiation wavelength for any pair of beams ( 13 ) reflected from different unit reflectors ( 10 ), which value essentially is multiple of 2π.

Viewing angle control film and image display device

A viewing angle control film includes, in order, a first polarizer in which an absorption axis is in a direction perpendicular to a film surface; a first phase difference plate which is a λ/4 plate and has a patterned optical anisotropic layer; and a second phase difference plate which is a λ/4 plate and has a patterned optical anisotropic layer, in which the patterned optical anisotropic layers have a constant phase difference and are divided into a plurality of belt-like regions in the same plane, directions of slow axes in one belt-like region match each other and directions of slow axes of belt-like regions adjacent to each other are different from each other in the patterned optical anisotropic layer, and the belt-like region of the first phase difference plate and the belt-like region of the second phase difference plate are disposed so as to intersect with each other in a plane direction.

Acousto-optic device

Wavelength tunable laser

The wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity; a wavelength tunable laser medium (18) disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto-optical crystal (20) disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means (26) mounted on the acousto-optical crystal and for inputting an acoustic wave to the acousto-optical crystal; an optical element (28) disposed in the laser resonator and for correcting dispersion of the diffracted light outputted from the acousto-optical crystal; and a pulse excitation laser (32) for inputting excitation laser beam into the laser resonator.

AOTF DEVICE FOR PROGRAMMABLE ACOUSTO-OPTICAL FILTERING OF HIGH SPECTRAL RESOLUTION AND LARGE ANGULAR OPENING IN THE INFRARED DOMAIN.

L'invention a pour objet un dispositif AOTF pour le filtrage acousto-optique programmable de haute résolution spectrale et de grande ouverture angulaire dans le domaine infrarouge, comprenant un cristal acousto-optique biréfringent TR, un transducteur T assurant la génération d'une onde acoustique transversale, permettant une diffraction d'une onde optique incidente ordinaire O , d'incidence θ , en une onde optique extraordinaire Od, d'angle θ , sachant que la susdite diffraction est équivalente à une réflexion proche de la normale au plan d'onde de la susdite onde optique incidente O , le susdit angle θ de l'onde optique diffractée O est équivalent à la susdite incidente θ de l'onde optique incidente O , majorée d'une valeur comprise entre 160 et 180 degrés. The subject of the invention is an AOTF device for programmable acousto-optic filtering with high spectral resolution and large angular aperture in the infrared range, comprising a birefringent acousto-optic crystal TR, a T transducer ensuring the generation of an acoustic wave transverse, allowing a diffraction of an ordinary incident optical wave O, of incidence θ, into an extraordinary optical wave Od, of angle θ, knowing that the aforesaid diffraction is equivalent to a reflection close to the normal to the wave plane of the aforementioned incident optical wave O, the aforesaid angle θ of the diffracted optical wave O is equivalent to the aforesaid incident θ of the incident optical wave O, increased by a value between 160 and 180 degrees.

Method of and apparatus for diffracting light

1368820 Modulating light HEWLETTPACKARD CO 2 Dec 1971 [28 Dec 1970] 56036/71 Heading H4F In apparatus wherein a plane polarized light beam 14 is passed collinearly with an acoustic wave S through a birefringent medium 11 so that a narrow optical band (at a frequency determined by the acoustic frequency, according to a phase matching condition) is diffracted into the orthogonal polarization and transmitted by an analyser 17, if the acoustic phase velocity vector is collinear with the optical path, the acoustic group velocity vector may be at an angle thereto whereby the acoustic wave tends to "walk away" from the optical path reducing the effective coherence length and the effectiveness of the interaction. In such cases it is now proposed to render the optical path and the acoustic group velocity vector collinear. Fig. 3, illustrates a case where the wave S from a transducer 18 is reflected at a surface 12 of medium 11 into collinearity with the optical beam 14, the medium 11 preferably being surrounded by a fluid 23, and the angle of face 12 for collinear optical and acoustic group velocity vectors is derived. The incident angle # 1 for the beam 14 depends on the fluid 23 used, and is approximately the desired Brewster angle for water 23 and crystal quartz 11. In Fig. 4 beam 14 and wave S are both transmitted through a medium 24 and face 12 into medium 11 and again derivations of the various angles are given. Medium 24 may be fused quartz or YAG for crystal quartz 11, or YAG with crystalline LiNbO 3 11, and the assembly may be operated for example, in air or a silicone oil bath depending on the required optical transmission.

Tunable wavelength illumination system

Wearable display device comprising an optically-anisotropic layer having liquid crystal compounds with optical axes continuously rotating along at least one in-plane direction

A wearable display device 1 includes a display panel 11, an eyepiece 31, and an optical element 21 that is disposed between the display panel 11 and the eyepiece 31, in which the optical element 21 includes an optically-anisotropic layer 23 that is formed of a cured layer of a composition including a liquid crystal compound 24, and the optically-anisotropic layer 23 has a liquid crystal alignment pattern AP 1 in which a direction of an optical axis derived from the liquid crystal compound 24 changes while continuously rotating along at least one in-plane direction of the optically-anisotropic layer 23.

Scanning microscope and main beam splitter for scanning microscope

Acousto-optic filter

An acousto-optic filter utilizing the far-off-axis anisotropic Bragg diffraction comprising an optically anisotropic acousto-optic medium embodied by paratellurite. The light entrance surface is slanted to the crystalline axis to make a light beam incident perpendicularly to the surface. The light exit surface is slanted to the direction of the entrance surface to minimize the dispersion of diffracted angle due to light wave length.

Acoustic Light Modulation Method and Apparatus with Enhanced Diffraction Efficiency

본 발명은 회절효율(dirffraction efficiency)이 증진된 음향광변조방법 및 장치(AOM : Acousto-Optic Modulator)에 관한 것으로서, 초음파를 발생시키는 트랜스듀서를 갖춘 음향광변조장치에 있어서, 상기 트랜스듀서의 전극 모양이 나비 넥타이 형태인 것을 그 특징으로 하여, 스위칭시간을 유지시키면서 회절효율을 증진시킬 수 있다.

Analyzing microtextured regions of optically anisotropic materials

Images of samples that are illuminated with polarized light are captured. Azimuth and inclination data are extracted from the captured images. The azimuth and inclination data are used to quantify MTRs.

Acousto-optic device and fabrication method of acousto-optic device

An acousto-optic device is disclosed which can achieve both of suppression of secular change and prevention of device damage and can maintain a stabilized wavelength selection filtering operation. The acousto-optic device includes a substrate on which a SAW guide for guiding a surface acoustic wave and an optical waveguide for guiding an optical wave are provided. A pyro-electricity coping conductive wiring pattern is provided in a region of the substrate other than the SAW guide and neutralizes polarization charge generated on a surface of the substrate.

DEVICE FOR CONTROLLING LIGHT PULSES BY AN ACOUSTO-OPTIC PROGRAMMABLE DEVICE

This acousto-optic device comprises an elasto-optic medium (1) with an acoustic transducer (2) capable of generating in the elasto-optic medium an acoustic wave modulated along a predetermined direction, and means for coupling in the elasto-optic medium a polarised incident optical wave (Si). The device has a programming circuit (6) for modulating the acoustic wave. This device can be inserted in a laser system. It then receives a polarised extended optical impulse to be amplified and supplies an extended optical impulse. An optical amplifier amplifies the extended optical impulse and an optical compressing device compresses the amplified extended optical impulse. The effects of the chain dispersal can be compensated by programming the acousto-optic device.

Acousto-optic filter without radio frequency shift of filtered radiation and laser devices with its application

FIELD: laser technology. SUBSTANCE: invention relates to laser technology, applied optics, acousto-optics, spectroscopy, measuring technology. In the noncollinear acousto-optic filter for uniaxial birefringent crystal of arbitrarily polarized radiation with a wavelength of λ with two orthogonal plane-polarized once diffracted on ultrasonic wave with a frequency of ƒ at angles α 1 and α 2 in the air relative to the normal to the rear of the optical crystal face filter light e- and o- beams at the exit behind the rear output optical crystal face filter on the way of these diffracted light beams, an optical device for their return at the same angles α 1 and α 2 back to the crystal filter is installed. Each beam returns along the path of another beam with opposite polarization. The specified optical device has the form of either a mirror system or a retroprism with complete internal reflections made of an optically transparent material in the form of optical glass or a crystal of cubic symmetry, and both mirrors and retroprisms are used in conjugation with a phase element rotating the plane of polarization by 90°. EFFECT: invention provides simplification of the filter design, the possibility of directly embedding an anisotropic acousto-optic filter into a laser resonator with an isotropic fiber light guide without the use of external polarization devices, reducing optical losses due to the absence of an external polarization divider, the absence of a radio frequency shift of the output light beam. 3 cl, 7 dwg

Connecting method of optical function devices, and optical apparatus

The present invention aims at providing a connecting method capable of suppressing an influence of stray light for a plurality of optical function devices formed on the same substrate, and an optical apparatus applied with the control method. To this end, in the connecting method of optical function devices according to the present invention, the plurality of optical function devices formed on the same substrate are cascade connected so that both ends of an optical path passing through the plurality of optical function devices are positioned on the same end face of the substrate. According to such a connecting method, it becomes possible to effectively suppress a leakage of stray light from an optical input side to an optical output side.

Optical wavelength tunable filter

An acousto-optical tunable filter is disclosed. The filter includes a medium having one or more indices of refractions alterable by the application of acoustic waves to the medium. The filter also includes an acoustic transducer coupled to the medium to generate the acoustic waves Altering the frequency of the acoustic wave selects among the different wavelengths in the incident light ray. The device also includes an optical mirror for reflecting a wave diffracted by the medium back to the medium so that it can again be diffracted. The first diffracted wave has its frequency shifted in one direction by the frequency of the acoustic wave while the second diffracted wave has its frequency shifted in the opposite direction, thereby compensating for the first shift. The result is an output ray with little or no frequency shift.

Device for converting a single frequency linearly polarized laser beam into a dual frequency orthogonally polarized beam

Tunable acousto-optic filter element, adjustable light source, microscope and acousto-optic beam splitter

Akusto-optisches Filterelement (114), umfassend einen akusto-optischen Kristall (118) mit einem akustischen Signalgeber (120) zur Erzeugung akustischer Signale in dem akusto-optischen Kristall (118), wobei der akusto-optische Kristall (118) eingerichtet ist, um entsprechend einer an den akustischen Signalgeber (120) applizierten Hochfrequenz durch Beugung selektiv Licht einer Zielwellenlänge aus einem in den akusto-optischen Kristall (118) eintretenden Eingangslichtstrahl (116) räumlich in eine vorbestimmte Beugungsordnung abzulenken und dadurch einen Ziellichtstrahl (126) mit der Zielwellenlänge zu erzeugen, ferner umfassend ein im Ziellichtstrahl (126) angeordnetes Raumfilterelement (132), wobei das Raumfilterelement (132) ausgestaltet ist, um in einer Ebene senkrecht zur Ausbreitungsrichtung des Ziellichtstrahls (126) selektiv die Intensität des Ziellichtstrahls (126) zu unterdrücken, und wobei das Raumfilterelement (132) derart eingestellt ist, dass Nebenmaxima einer höheren Ordnung als 2 einer räumlichen Intensitätsverteilung des in die vorbestimmte Beugungsordnung abgelenkten Ziellichtstrahls (126) unterdrückt werden. Acousto-optical filter element (114), comprising an acousto-optical crystal (118) with an acoustic signal generator (120) for generating acoustic signals in the acousto-optical crystal (118), wherein the acousto-optical crystal (118) is set up, to spatially deflect light of a target wavelength from an input light beam (116) entering the acousto-optical crystal (118) into a predetermined diffraction order according to a high frequency applied to the acoustic signal generator (120) by diffraction and thereby a target light beam (126) with the target wavelength further comprising a spatial filter element (132) arranged in the aiming light beam (126), wherein the spatial filter element (132) is configured to selectively suppress the intensity of the aiming light beam (126) in a plane perpendicular to the direction of propagation of the aiming light ...

The method and apparatus for activating acousto-optic component

一种致动声光部件的方法和设备，所述声光部件影响穿过其中的光，尤其影响显微镜光路中的照明光和/或检测光，显微镜优选地是激光扫描显微镜，其中，照明波长和/或检测波长使用至少一个频率发生器设定，频率发生器连接到声光部件，并控制该影响，其中，优选地为了确保独立于温度的影响，频率发生器产生信号，该信号产生用于照明光和/或检测光的波长的强度分布的光谱扩展，其中，该致动由两个或更多个致动信号实现，使得产生声光部件的传递函数的两个或更多个重叠和/或叠加主瓣或主最大值。

Electronically tunable optical filtering modules

Electronically agile optical filtering modules for equalizing light propagation differences in at least two spaced optical beam pathways in the modules. The modules use optical polarization rotation devices that may include acousto-optic tunable filter (AOTF) devices, liquid crystal devices, and magneto-optic devices. Such devices may be subject to polarization dispersion losses (PDL) and polarization mode dispersion (PMD) that may be different for when light travel along different light paths through the device. By redirecting light beams back along a different bi-directional path through the devices which may exhibit non-uniform performance across orthogonal polarizations, PDL and PMD may be reduced.

Control method and control apparatus of optical wavelength variable filter

The present invention aims at providing a control method and a control apparatus for controlling variable selected wavelengths at respective stages with high accuracy and reliability, to obtain desired wavelength characteristics, in a multi-staged band rejection type optical wavelength variable filter. To this end, the optical wavelength variable filter in the present invention has wavelength characteristics formed with a blocking band including a wavelength width according to a deviation amount obtained by deviating respective selected wavelengths from one another of a plurality of optical filter sections that are cascade connected, and the control apparatus for controlling the wavelength characteristics of this optical wavelength variable filter comprises a dropped light monitoring section that takes out to monitor a dropped light to be blocked from passing through at the optical filter section corresponding to the selected wavelength most closest to the center wavelength of the blocking band, among the plurality of selected wavelengths; and a selected wavelength controlling section that adjusts the respective selected wavelengths based on a peak wavelength of the dropped light.

Drive method for a plurality of acousto-optic filters, acousto-optic filter apparatus, and selective wavelength extension method

An AOTF drive method for driving a plurality of AOTFs connected in tandem comprises: separating a plurality of RF signals in advance into a plurality of groups; batch-branching the RF signals of each group in accordance with the number of steps of the AOTFS; and batch-adjusting the phases of the individual branched RF signals. As a result, this makes it possible to reduce the number of phase shifters compared to the prior art while maintaining the effectiveness of suppressing beats in the AOTFs.

Optical waveguide filter

The present invention aims at providing an optical waveguide filter for reliably selecting light of desired wavelength using polarization mode conversion, to realize a sufficient extinction ratio. To this end, according to the present invention, in an optical waveguide filter provided with an input side polarization splitting section that polarization splits light input to an input waveguide, and outputs to first and second waveguides, a mode converting section that performs polarization mode conversion on only the light corresponding to desired wavelength among the lights being propagated through the first and second waveguides, and an output side polarization splitting section that polarization splits the propagated lights of the respective waveguides having passed through the mode converting section, there is disposed a first polarization splitting section on the first waveguide and a second polarization splitting section on the second waveguide, which are positioned between the input side and output side polarization splitting sections, and a non-split component generated corresponding to a splitting rate in the input side polarization splitting section is eliminated so that only the selected light is output to an output waveguide.

Optical laminate, light-guiding element, and ar display device

Provided are an optical laminate, a light-guiding element, and an AR display device that achieve a large diffraction angle. The present invention has, in order, a first optically anisotropic layer, a phase difference layer, and a patterned cholesteric liquid crystal layer. The first optically anisotropic layer: is formed using a composition that includes a liquid crystal compound; and has a liquid crystal orientation pattern in which the orientation of an optical axis that originates form the liquid crystal compound continuously rotates along at least one direction within a plane. The patterned cholesteric liquid crystal layer: is formed using a composition that includes a liquid crystal compound; has a liquid crystal orientation pattern in which the orientation of an optical axis that originates from the liquid crystal compound continuously rotates along at least one direction within a plane; and is configured such that the liquid crystal compound is cholesterically oriented. The orientation of the optical axis that originates from the liquid crystal compound of the first optically anisotropic layer and the orientation of the optical axis that originates from the liquid crystal compound of the patterned cholesteric liquid crystal layer continuously rotate along the same one direction and rotate in the same direction along the one direction.

Wavelength selectable laser oscillator in wavelength tunable laser

An object of the present invention is to provide a wavelength selectable laser oscillator in wavelength tunable laser by which high-speed tuning of wavelength can be achieved while utilizing continuous-wave laser beam as the excited laser beam. The wavelength selectable laser oscillator in wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity on the outgoing side and a total reflection mirror which does not transmit light, but reflects the light; a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto-optical crystal disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means mounted on the acousto-optical crystal and for inputting an acoustic wave to the acousto-optical crystal; and a continuous-wave laser for inputting excited laser beam into the laser resonator; the laser beam outputted from the mirrors on the outgoing side being utilized as the outgoing laser beam from the laser resonator.

High-aperture two-crystal acousto-optical monochromator

FIELD: optics. SUBSTANCE: invention relates to applied optics and can be used in acoustooptical monochromators, spectrometers and image spectrometers. High-aperture two-crystal acoustooptic monochromator consists of an optically connected light polarization selection input element, a first cell AO, an intermediate light polarization selection element, a second cell AO, an output element for light polarization selection. To increase the aperture of a two-crystal monochromator AO, the reflecting facets of the AO cells acting as the dilution polarizers play the role of the input and output elements of the light polarization selection. EFFECT: invention relates to applied optics and can be used in acoustooptical monochromators, spectrometers and image spectrometers. 2 cl, 3 dwg