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公开(公告)号：EP3907492A1
公开(公告)日：2021-11-10
申请号：EP20173726.9
申请日：2020-05-08
Applicant: ETH Zurich
Inventor： Lightner, Carin Rae , Gisler, Daniel , Norris, David
Abstract: A system (1) for measuring the optical activity of a sample (2) comprises at least one frequency modulation device (3), at least one synchronization device (4), and at least one detection device (5). The frequency modulation device (3) is configured to modulate a frequency of incident electromagnetic radiation being emitted from a sample (2) and/or being irradiated on to a sample (2) with at least one frequency modulation signal (Sf). The synchronization device (4) is configured to receive the at least one frequency modulation signal (Sf) and to emit at least one detection modulation signal (Sd) being synchronized with the at least one frequency modulation signal (Sf). The system (1) is configured such that the detection device (5) detects the electromagnetic radiation (EMs) in synchronization with the detection modulation signal (Sd).
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公开(公告)号：EP3821233A1
公开(公告)日：2021-05-19
申请号：EP19733800.7
申请日：2019-06-28
Applicant: Danmarks Tekniske Universitet
Inventor： ILCHENKO, Oleksii , BOISEN, Anja , SLIPETS, Roman
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5.发明公开
公开(公告)号：EP3505886A3
公开(公告)日：2019-07-31
申请号：EP18212124.4
申请日：2018-12-12
Applicant: Palo Alto Research Center Incorporated
Inventor： HEGYI, Alex
Abstract: A reconstruction matrix used for calculating a hyperspectral data-cube includes rows of periodic functions. Each row of the reconstruction matrix corresponds to a selected wavelength and each column corresponds to a selected retardance of an interferometer. The periodic functions have as a parameter the selected wavelength of the corresponding row and are sampled at the selected retardances of each of the corresponding columns. An interferogram data-cube is obtained and includes an array of one or more simultaneously measured interferograms. Each row of the interferogram data-cube corresponds to one of the selected retardances and each column corresponds to a different interferogram from the simultaneously measured interferograms. A set of matrix-vector products for each of the interferograms is formed by multiplying the reconstruction matrix with a column of the interferogram data-cube to form the hyperspectral data-cube.
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Patent Agency Ranking
公开(公告)号：EP3505883A1
公开(公告)日：2019-07-03
申请号：EP18212125.1
申请日：2018-12-12
Applicant: Palo Alto Research Center Incorporated
Inventor： HEGYI, Alex
Abstract: An apparatus includes a liquid-crystal polarization interferometer that causes an optical path delay between a first and a second polarization of input light. The liquid-crystal polarization interferometer includes a liquid-crystal variable retarder that provides a variable retardance in response to a voltage applied across the liquid-crystal cell. First and second polarizers are located on opposing sides of the liquid-crystal cell. The apparatus includes an image sensor that senses interferograms based on output light that passes through the liquid-crystal polarization interferometer. The apparatus includes a color filter that filters one of the input light and the output light. The color filter has a spectral transmission characteristic that passes more light in a blue spectral region that in a red spectral region.
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公开(公告)号：EP3218681A2
公开(公告)日：2017-09-20
申请号：EP15828685.6
申请日：2015-11-13
Inventor： VISSER, Huibert , VAN BRUG, Hedser
IPC: G01J3/36 , G01N21/3504 , G01J3/42 , G01J3/447 , G01J3/453
CPC classification number: G01J3/42 , G01J3/36 , G01J3/447 , G01J3/4531 , G01J3/4532 , G01N21/31 , G01N21/314 , G01N21/39 , G01N33/0027
Abstract: The invention pertains to a method of spatially resolved detection of a gas substance in an area, comprising: imaging the area on a first image sensor, in a wavelength spectrum including an absorption wavelength peak corresponding to said gas substance; imaging the area on a second image sensor, to provide for each pixel of the first image a corresponding pixel of the second image for respective on- and off-peak wavelengths relative to the absorption wavelength; and providing a difference image as a function of the two pixel values of first and second image sensors to produce an image of the spatially resolved absorption wavelength corresponding to said gas substance.
Abstract translation: 本发明涉及一种空间分辨检测区域中的气体物质的方法，包括：在包括对应于所述气体物质的吸收波长峰值的波长谱中的第一图像传感器上成像所述区域; 在第二图像传感器上成像所述区域，以针对所述第一图像的每个像素为所述第二图像的对应像素提供相对于所述吸收波长的相对于波峰和波峰之外的波长; 以及提供作为第一和第二图像传感器的两个像素值的函数的差异图像，以产生对应于所述气体物质的空间分辨吸收波长的图像。
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8.发明授权SYSTEM AND METHOD FOR CONTROLLING INTENSITY OF A BEAM OF ELECTROMAGNETIC RADIATION IN ELLIPSOMETERS AND POLARIMETERS 有权用于控制椭圆偏振仪和偏振器中的电磁辐射束的强度的系统和方法
公开(公告)号：EP2109758B1
公开(公告)日：2017-06-21
申请号：EP08726833.0
申请日：2008-03-14
Applicant: J.A. WOOLLAM CO. INC.
Inventor： PFEIFFER. Galen L. , LIPHARDT, Martin M.
CPC classification number: G01J3/10 , G01J3/447 , G01J4/00 , G01N21/211 , G01N2021/213
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公开(公告)号：EP2989432A2
公开(公告)日：2016-03-02
申请号：EP14717858.6
申请日：2014-04-16
Applicant: MBDA UK Limited
Inventor： GREENWAY, Christopher , SIMMONS, Richard, Charles
IPC: G01J3/02 , G01J4/04 , G01J3/28 , G01J3/447 , G01J3/50 , G02B27/28 , H01L27/146 , H04N5/33 , G06T5/00
CPC classification number: H04N5/33 , G01J3/0208 , G01J3/0224 , G01J3/0235 , G01J3/0264 , G01J3/027 , G01J3/2823 , G01J3/447 , G01J3/50 , G01J4/04 , G01J2003/2826 , G02B5/3058 , G02B27/288 , G06T5/50 , G06T7/11 , G06T2207/10036 , G06T2207/10048 , G06T2207/20224 , G06T2210/61
Abstract: An imaging apparatus and method are provided for improving discrimination between parts of a scene enabling enhancement of an object in the scene. A camera unit is arranged to capture first and second images from the scene in first and second distinct and spectrally spaced apart wavebands. An image processing unit processes the images so captured and processes polarimetric information in the images to enable better discrimination between parts of the scene. An image of the scene, including a graphical display of the polarimetric information, may be displayed on a visual display unit thus enhancing an object in the scene for viewing by a user. Correlation parameters indicating, possibly on a pixel-by-pixel basis, the correlation between the actual image intensity at each angle of polarization and a modelled expected image intensity may be used to enhance the visibility of an object.
Abstract translation: 提供了一种成像装置和方法，用于改善场景中能够增强场景中的对象的部分之间的区分。 摄像机单元（12）被布置为在第一和第二不同且光谱间隔开的波段中捕捉来自场景（8）的第一和第二图像。 图像处理单元（14）处理如此拍摄的图像并处理图像中的偏振信息，以便能够更好地区分场景的各个部分。 包括极化信息的图形显示的场景的图像可以被显示在视觉显示单元（16）上，从而增强场景中的对象以供用户观看。 可能在逐个像素的基础上指示每个偏振角处的实际图像强度（30）和模型化的预期图像强度之间的相关性的相关参数可以用于增强对象的可见性。
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公开(公告)号：EP2929309A1
公开(公告)日：2015-10-14
申请号：EP13808133.6
申请日：2013-11-29
Applicant: Horiba Jobin Yvon S.A.S.
Inventor： ACHER, Olivier , RICHARD, Simon
CPC classification number: G01J3/0224 , G01J3/0208 , G01J3/021 , G01J3/1804 , G01J3/447 , G01J2003/1208
Abstract: The present invention relates to a spectrometer (100) for analysing the spectrum of an upstream light beam (1) comprising an entrance slit (101) and angular dispersing means (130). According to the invention, the angular dispersing means comprise at least one polarisation-dependent diffraction grating that is suitable for, at the plurality of wavelengths (11, 12, 13), diffracting a corrected light beam (20) into diffracted light beams (31, 32, 33) in a given particular diffraction order of the polarisation-dependent diffraction grating, which is either the +1 diffraction order or the -1 diffraction order, when the corrected light beam has a preset corrected polarisation state that is circular; and the spectrometer comprises means for modifying polarisation (1100) placed between the entrance slit and the angular dispersion means, which means are suitable for modifying the polarisation state of the upstream light beam in order to generate the corrected light beam with a preset corrected polarisation state.
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