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

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Применить Всего найдено 7. Отображено 7.
27-06-2017 дата публикации

Visible-infrared plane grating imaging spectrometer

Номер: US0009689744B2
Автор: Michael P. Chrisp, CHRISP MICHAEL P, Chrisp Michael P.
Принадлежит: Massachusetts Institute of Technology, MASSACHUSETTS INST TECHNOLOGY

An imaging spectrometer, covering the visible through infrared wavelengths, which disperses the light by a plane diffraction grating behind a wedged optical element. This design uses an achromatic doublet lens with a reflective coating on its convex back surface to produce the spectra on a flat detector. Spatial keystone distortion and spectral smile are controlled to less than one tenth of a pixel over the full wavelength range, facilitating the use of simple retrieval algorithms.

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Номер записи: 1
05-01-2012 дата публикации

DUAL WAVEBAND COMPACT CATADIOPTRIC IMAGING SPECTROMETER

Номер: US20120002202A1
Автор: Chrisp Michael P.
Принадлежит:

A catadioptric dual waveband imaging spectrometer that covers the visible through short-wave infrared, and the midwave infrared spectral regions, dispersing the visible through shortwave infrared with a zinc selenide grating and midwave infrared with a sapphire prism. The grating and prism are at the cold stop position, enabling the pupil to be split between them. The spectra for both wavebands are focused onto the relevant sections of a single dual waveband detector. Spatial keystone distortion is controlled to less than one tenth of a pixel over the full wavelength range, facilitating the matching of the spectra in the midwave infrared with the shorter wavelength region. 1. A dual waveband imaging spectrometer , comprising:an entrance slit for transmitting light,a first dioptric lens,a mirror,a dispersing prism with a reflective coating,an immersion grating with a reflective coating,a second dioptric lens, anda dual waveband detector;said entrance slit, said first dioptric lens, said mirror, said dispersion prism, said immersion grating, said second dioptric lens, and said detector array positioned whereinsaid entrance slit transmits light to said first dioptric lens, which refracts light to said mirror, which reflects light back through said first dioptric lens to said dispersing prism and said immersion grating, and dispersed dual waveband light is focused through said first dioptric lens and said second dioptric lens to said dual waveband detector.2. The dual waveband imaging spectrometer of wherein said immersion grating includes a refractive face with curvature and disperses a wavelength claim 1 , and wherein said curvature of said refractive face provides the necessary power to form an achromatic correction with the said dioptric lenses and over said wavelength range of the immersion grating3. The dual waveband imaging spectrometer of wherein said immersion grating includes a focal surface and wherein said curvature of the said dispersion grating is adjusted ...

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Номер записи: 2
15-03-2012 дата публикации

Echelle Grating Multi-Order Imaging Spectrometer Utilizing A Catadioptric Lens

Номер: US20120062889A1
Автор: Bowers Joel M., Chrisp Michael P.
Принадлежит: Lawrence Livermore National Security, LLC

A cryogenically cooled imaging spectrometer that includes a spectrometer housing having a first side and a second side opposite the first side. An entrance slit is on the first side of the spectrometer housing and directs light to a cross-disperser grating. An echelle immersions grating and a catadioptric lens are positioned in the housing to receive the light. A cryogenically cooled detector is located in the housing on the second side of the spectrometer housing. Light from the entrance slit is directed to the cross-disperser grating. The light is directed from the cross-disperser grating to the echelle immersions grating. The light is directed from the echelle immersions grating to the cryogenically cooled detector on the second side of the spectrometer housing. 1. A cryogenically cooled imaging spectrometer apparatus ,comprising:a spectrometer housing having a first side and a second side opposite said first side,an entrance slit on said first side of said spectrometer housing for directing light,a cross-disperser grating,a echelle immersions grating,a catadioptric lens,anda cryogenically cooled detector on said second side of said spectrometer housing,wherein said light from said entrance slit is directed to said cross-disperser grating,herein said light is directed from said cross-disperser grating to said echelle immersions grating, andwherein said light is directed from said echelle immersions grating to said cryogenically cooled detector on said second side of said spectrometer housing.2. The cryogenically cooled imaging spectrometer apparatus of including a cold stop between said entrance slit and said cross-disperser grating.3. The cryogenically cooled imaging spectrometer apparatus of wherein said cross-disperser grating is a flat reflective grating cross-disperser cut into a lens surface.4. The cryogenically cooled imaging spectrometer apparatus of wherein said echelle immersions grating is a ruled germanium echelle immersion grating.5. The ...

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Номер записи: 3
04-04-2013 дата публикации

Substrate-Integrated Hollow Waveguide Sensors

Номер: US20130081447A1
Автор: Carter Jerry Chance, Chrisp Michael P., Kim Seong-Soo, Manuel Anastacia M., Mizaikoff Boris, WILK Andreas
Принадлежит:

Methods and apparatuses are provided that greatly expand the utility of conventional hollow waveguide-based sensors via either straight, substrate-integrated channels or via meandering (e.g., circuitous, curved or folded optical paths) waveguide sensor designs. Full- or hybrid-integration of the meandering hollow waveguide with light source, detector, and light-guiding optics facilitates compact yet high-performance gas/vapor and/or liquid sensors of the substrate-integrated hollow waveguide sensor. 1. A substrate integrated hollow waveguide , comprising:at least one substrate layer; anda open portion formed in one or more layers of said at least one substrate layer, wherein a surface of said open portion is reflective to one or more predetermined wavelengths of light.2. The waveguide of claim 1 , wherein said open portion comprises a light input port and a light output port.3. The waveguide of claim 2 , wherein the centroid of said open portion from said light input port to said light output port is selected from the group consisting of straight claim 2 , folded and curved.4. The waveguide of claim 3 , wherein said light output port is at the same location as said light input port.5. The waveguide of claim 3 , further comprising a light source configured to provide said one or more predetermined wavelengths of light.6. The waveguide of claim 5 , further comprising means for directing said predetermined wavelengths of light into said light input port and further comprising means for directing said predetermined wavelengths out of said light output part and to said optical analyzer.7. The waveguide of claim 6 , further comprising an optical analyzer configured to analyze light that exits said light output port.8. The waveguide of claim 5 , further comprising means for scanning the wavelength of light from said light source.9. The waveguide of claim 1 , wherein said at least one substrate layer is rigid.10. The waveguide of claim 1 , wherein said at least one ...

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Номер записи: 4
22-01-2015 дата публикации

VISIBLE-INFRARED PLANE GRATING IMAGING SPECTROMETER

Номер: US20150021480A1
Автор: Chrisp Michael P.
Принадлежит:

An imaging spectrometer, covering the visible through infrared wavelengths, which disperses the light by a plane diffraction grating behind a wedged optical element. This design uses an achromatic doublet lens with a reflective coating on its convex back surface to produce the spectra on a flat detector. Spatial keystone distortion and spectral smile are controlled to less than one tenth of a pixel over the full wavelength range, facilitating the use of simple retrieval algorithms. 1. A visible-infrared plane grating imaging spectrometer , comprising:an entrance slit for transmitting light,an achromatic lens with a reflective back surface,a plane reflective diffraction grating immersed in a wedged optical element,an order sorting filter,a visible-infrared detector;said entrance slit, said achromatic lens with a reflective back surface, said plane reflective diffraction grating immersed in a wedged optical element, said order sorting filter, and said detector for visible and infrared radiation positioned wherein,said entrance slit transmits light to said achromatic lens with reflective back surface, which refracts light and then reflects the light from the back surface, passing back through the lens and is directed to said plane reflective diffraction grating immersed in a wedged optical element, said wedged optical element refracts the light then the reflective diffraction grating spectrally disperses and directs the light back through wedged optical element, which refracts light to said achromatic lens with a reflective back surface, said achromatic lens with a reflective back surface refracts light and then reflects the light from the back surface, passing hack through the lens and focuses it to said order sorting filter, said order sorting filter transmits the selected spectral orders to the said visible-infrared detector.2. The visible-infrared plane grating imaging spectrometer of wherein the optical powers of the said achromatic lens element with and the power ...

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Номер записи: 5
19-08-2008 дата публикации

Imaging spectrometer wide field catadioptric design

Номер: US7414719B2
Автор: Michael P. Chrisp
Принадлежит: Lawrence Livermore National Security LLC

A wide field catadioptric imaging spectrometer with an immersive diffraction grating that compensates optical distortions. The catadioptric design has zero Petzval field curvature. The imaging spectrometer comprises an entrance slit for transmitting light, a system with a catadioptric lens and a dioptric lens for receiving the light and directing the light, an immersion grating, and a detector array. The entrance slit, the system for receiving the light, the immersion grating, and the detector array are positioned wherein the entrance slit transmits light to the system for receiving the light and the system for receiving the light directs the light to the immersion grating and the immersion grating receives the light and directs the light through the system for receiving the light to the detector array.

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Номер записи: 6
13-09-2007 дата публикации

Compact imaging spectrometer

Номер: WO2007102801A1
Автор: Charles L. Bennett, Michael P. Chrisp, Paul J. Kuzmenko, Scott A. Lerner
Принадлежит: The Regents of the University of California

A compact imaging spectrometer comprises an entrance slit for transmitting light, a system for receiving the light and directing the light, a grating, and a detector array. The entrance slit, the system for receiving the light, the grating, and the detector array are positioned wherein the entrance slit transmits light to the system for receiving the light and the system for receiving the light directs the light to the grating and the grating receives the light and directs the light to the detector array.

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Номер записи: 7