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公开(公告)号：US10732059B2
公开(公告)日：2020-08-04
申请号：US16371517
申请日：2019-04-01
Applicant: CORNING INCORPORATED
Inventor： Ryan Claude Andrews , Chai Hsin Kuang , Rostislav Vatchev Roussev
Abstract: The prism-coupling systems and methods include using a prism-coupling system to collect initial TM and TE mode spectra of a chemically strengthened article having a refractive index profile with a near-surface spike region and a deep region. The initial TM and TE mode spectra are examined to see if they fall within a preferred measurement window that can produce an accurate estimate of the knee stress to within a select tolerance. If not, then measurement configuration of the prism-coupling system is changed and new TM and TE mode spectra are collected. This process is repeated until the new TM and TE mode spectra fall within the preferred measurement window. The new TM and TE mode spectra are then used to determine the knee stress. Changing the measurement configuration can include changing at least one of the measurement wavelength, interfacing fluid thickness and interfacing fluid refractive index.
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公开(公告)号：US10663346B2
公开(公告)日：2020-05-26
申请号：US15858338
申请日：2017-12-29
Applicant: Palo Alto Research Center Incorporated
Inventor： Alex Hegyi
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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公开(公告)号：US10605662B2
公开(公告)日：2020-03-31
申请号：US16279181
申请日：2019-02-19
Applicant: Massachusetts Institute of Technology
Inventor： Thomas H. Jeys , William D. Herzog , Brian G. Saar , Alexander M. Stolyarov , Ryan Sullenberger , David Crompton , Shawn Michael Redmond
Abstract: A device, and corresponding method, can include a pump light source configured to irradiate a target specimen. The device can also include a sensor configured to observe a probe speckle pattern based on light from a probe light source reflected from the target specimen. The device further may include a correlator configured to determine a material property of the target specimen by analyzing changes in images of the probe speckle pattern as a function of the irradiation with the pump light source. Advantages of the device and method can include much higher sensitivity than existing methods; the ability to use visible probe wavelengths for uncooled, low-cost visible detectors with high spatial resolution; and the ability to obtain target material properties without detecting infrared light.
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公开(公告)号：US10564504B2
公开(公告)日：2020-02-18
申请号：US15827204
申请日：2017-11-30
Applicant: Palo Alto Research Center Incorporated
Inventor： Alex Hegyi
IPC: G02F1/13 , G02F1/139 , G02F1/1335 , G01J4/04 , G02B5/30 , G01J3/447 , G01J3/28 , G01J3/45 , G01J3/453 , G02F1/133 , G02B27/28
Abstract: A liquid-crystal variable retarder has first and second liquid-crystal cells with respective first and second thicknesses, the second thickness being less than the first thickness. A feedback sensor provides a feedback signal indicative of a retardance of the liquid-crystal variable retarder. A controller is coupled to the feedback sensor and the first and second liquid-crystal cells. The controller is operable to apply a first signal to the first liquid-crystal cell based on a target retardance trajectory and a feedforward control model. The controller applies a second signal to the second liquid-crystal cell based on the feedback signal and the target retardance trajectory.
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公开(公告)号：US10473526B2
公开(公告)日：2019-11-12
申请号：US15526816
申请日：2015-11-13
Inventor： Huibert Visser , Hedser van Brug
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.
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Patent Agency Ranking
公开(公告)号：US20190301952A1
公开(公告)日：2019-10-03
申请号：US16371517
申请日：2019-04-01
Applicant: CORNING INCORPORATED
Inventor： Ryan Claude Andrews , Chai Hsin Kuang , Rostislav Vatchev Roussev
Abstract: The prism-coupling systems and methods include using a prism-coupling system to collect initial TM and TE mode spectra of a chemically strengthened article having a refractive index profile with a near-surface spike region and a deep region. The initial TM and TE mode spectra are examined to see if they fall within a preferred measurement window that can produce an accurate estimate of the knee stress to within a select tolerance. If not, then measurement configuration of the prism-coupling system is changed and new TM and TE mode spectra are collected. This process is repeated until the new TM and TE mode spectra fall within the preferred measurement window. The new TM and TE mode spectra are then used to determine the knee stress. Changing the measurement configuration can include changing at least one of the measurement wavelength, interfacing fluid thickness and interfacing fluid refractive index.
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公开(公告)号：US10422739B1
公开(公告)日：2019-09-24
申请号：US16350017
申请日：2018-09-12
Applicant: J.A. WOOLLAM CO., INC
Inventor： Jeremy A. Van Derslice , Martin M. Liphardt
Abstract: Reflectometer, spectrophotometer, ellipsometer, and polarimeter systems having a supercontinuum laser source of coherent electromagnetic radiation over a range of about 400-about 2500 nm, a stage for supporting a sample and a detector of electromagnetic radiation, wherein the supercontinuum source provides a coherent beam of electromagnetic radiation which interacts with a sample, and the detector system comprises functional combinations of gratings and/or combination dichroic beam splitter-prisms, which themselves can be optimized as regards wavelength dispersion characteristics, directs wavelengths in various ranges to various detectors that are well suited to detect them.
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公开(公告)号：US20190250038A1
公开(公告)日：2019-08-15
申请号：US16279181
申请日：2019-02-19
Applicant: Massachusetts Institute of Technology
Inventor： Thomas H. Jeys , William D. Herzog , Brian G. Saar , Alexander M. Stolyarov , Ryan Sullenberger , David Crompton , Shawn Michael Redmond
CPC classification number: G01J3/433 , G01J3/108 , G01J3/2823 , G01J3/447 , G01N21/1717 , G01N21/636 , G01N2021/1725
Abstract: A device, and corresponding method, can include a pump light source configured to irradiate a target specimen. The device can also include a sensor configured to observe a probe speckle pattern based on light from a probe light source reflected from the target specimen. The device further may include a correlator configured to determine a material property of the target specimen by analyzing changes in images of the probe speckle pattern as a function of the irradiation with the pump light source. Advantages of the device and method can include much higher sensitivity than existing methods; the ability to use visible probe wavelengths for uncooled, low-cost visible detectors with high spatial resolution; and the ability to obtain target material properties without detecting infrared light.
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公开(公告)号：US10378964B2
公开(公告)日：2019-08-13
申请号：US16088875
申请日：2017-03-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koji Takahashi , Haruyasu Ito , Koyo Watanabe
Abstract: In a waveform measurement method, first, initial pulsed light is spatially dispersed for respective wavelengths. Next, the initial pulsed light is input to a polarization dependent type SLM in a state where a polarization plane is inclined with respect to a modulation axis direction, and a phase spectrum of a first polarization component of the initial pulsed light along the modulation axis direction is modulated, to cause a time difference between first pulsed light Lp1 including the first polarization component and second pulsed light Lp2 including a second polarization component orthogonal to the first polarization component. After combining the wavelength components, an object is irradiated with the pulsed light Lp1 and the pulsed light Lp2, and light generated in the object is detected. The above detection operation is performed while changing the time difference, and a temporal waveform of the pulsed light Lp1 is obtained.
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公开(公告)号：US20190170586A1
公开(公告)日：2019-06-06
申请号：US16302400
申请日：2017-08-09
Applicant: Sony Corporation
Inventor： Hitoshi MITANI , Masafumi WAKAZONO
Abstract: There is provided an imaging device including: an imaging section including pixels that generate pixel signals on the basis of incident light, the pixels including a polarization pixel having a predetermined polarization direction and a non-polarization pixel; and a polarization rotating section provided on an incidence plane side of the imaging section, and configured to rotate a polarization direction of the incident light.
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