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公开(公告)号：US20230102322A1
公开(公告)日：2023-03-30
申请号：US17911004
申请日：2020-12-28
Applicant: ZHEJIANG UNVIEW TECHNOLOGIES CO., LTD.
Inventor： GUOZHEN WANG , Ping XU
Abstract: Provided are a vehicle monitoring method and a vehicle monitoring system. The vehicle monitoring method includes that: a polarization angle of polarized light in a sky image reflected by a vehicle window in a monitoring scenario is calculated, and a light-filtering polarization angle is calculated according to the polarization angle of the polarized light in the sky image reflected by the vehicle window, where the polarized light in the sky image is formed by scattered sunlight in a sky region corresponding to the sky image; the polarized light in the sky image reflected by the vehicle window in the monitoring scenario is filtered out according to the light-filtering polarization angle; and the monitoring scenario is imaged to form a monitoring image.
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公开(公告)号：US20230003583A1
公开(公告)日：2023-01-05
申请号：US17756940
申请日：2020-11-30
Applicant: SONY GROUP CORPORATION
Inventor： LEGONG SUN , YASUTAKA HIRASAWA , YUHI KONDO , TAISHI ONO
Abstract: A quantization range setting unit (31) of an encoder (30) sets a quantization range for each Stokes parameter of a Stokes vector acquired from a Stokes vector calculation unit (20). The quantization range is set for the Stokes parameter indicating intensity, and is then set for the other Stokes parameters. A quantization unit (32) calculates the Stokes parameter indicating intensity as a predetermined quantization bit number, and calculates the quantization bit numbers of the other Stokes parameters on the basis of the predetermined quantization bit number and the quantization ranges set for the respective Stokes parameters. The quantization unit (32) performs a quantization process on the Stokes parameters on the basis of the quantization ranges and the quantization bit numbers, to generate quantized polarization information. A decoder (40) performs inverse quantization compatible with the encoder 30 on the quantized polarization information, and generates the Stokes vectors before quantization. The amount of polarization information data can be reduced.
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143.发明授权公开(公告)号：US11499911B2
公开(公告)日：2022-11-15
申请号：US17097979
申请日：2020-11-13
Applicant: MONTANA STATE UNIVERSITY
Inventor： Joseph A. Shaw , Laura M. Eshelman
Abstract: A method and system for imaging thermodynamic phase of clouds includes obtaining a spatially-resolved polarimetric image of a region of the sky containing a cloud using a multipixel image sensor having multiple channels corresponding to different wavelength bands, determining a value of the Stokes S1 polarization parameter of incident light on each pixel corresponding to a portion of the image containing the cloud for multiple channels corresponding to different wavelength bands, and determining the thermodynamic phase of the cloud within the image based on the values of the Stokes S1 polarization parameter. The Stokes S1 polarization parameter values determined for a first channel corresponding to a first wavelength band is used to determine a liquid thermodynamic phase, and the Stokes S1 polarization parameter values determined for a second channel corresponding to a second, shorter wavelength band is used to determine an ice thermodynamic phase.
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公开(公告)号：US11378401B2
公开(公告)日：2022-07-05
申请号：US17244962
申请日：2021-04-30
Applicant: ZHEJIANG UNIVERSITY
Inventor： Kaichen Song , Jinlong Yu , Lingyun Ye , Ju Wang
Abstract: A polarization-maintaining fully-reciprocal bi-directional optical carrier microwave resonance system and an angular velocity measurement method thereof. In the system, highly stable optical carrier microwaves are generated in a clockwise direction and a counterclockwise direction in the same resonant cavity, and are used to measure the angular velocity of rotation of a carrier apparatus. A fully reciprocal ring-shaped resonant cavity structure is used to achieve a fully reciprocal bi-directional optical resonance system. A polarization state separation technique is used to separate an optical signal into two wavelengths, and optical signals with perpendicular polarization states are transmitted in opposite directions in a sensing ring, thereby improving the measurement capability of the sensing ring. Bi-directional optical carrier microwave resonance is achieved by using a phase tracking structure and a regenerative mode locking technique. A cavity length control technique is used to lock the oscillation frequency of microwaves in one of the directions to a highly stable standard time reference source, thereby achieving a stable relative cavity length of an optical resonant cavity. The described key techniques greatly improve the signal-to-noise ratio of bi-directional oscillation difference frequency signals caused by the Sagnac effect. The system and the method are practical and have high measurement precision.
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公开(公告)号：US20220196471A1
公开(公告)日：2022-06-23
申请号：US17554781
申请日：2021-12-17
Applicant: The Boeing Company
Inventor： David Roderick Gerwe , Paul S. Idell , Kevin Ray Paxton , Friedrich W. Kunzler
Abstract: A combined multi-spectral and polarization (CMSP) sensor is disclosed that enhances contrast-to-noise ratio (CNR). The CMSP sensor comprises a multi-spectral and polarization (MSP) filter, a single focal plane array (FPA), and a controller. The FPA comprises a plurality of detectors and the MSP filter comprises at least a first bandpass filter having a first frequency range and a second bandpass filter having a second frequency range that is distinct from the first frequency range and a first polarization filter having a first polarization value and a second polarization filter having a second polarization value that is distinct from the first polarization value.
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Patent Agency Ranking
公开(公告)号：US11346769B2
公开(公告)日：2022-05-31
申请号：US16796648
申请日：2020-02-20
Applicant: Onto Innovation Inc.
Inventor： Alexander George Boosalis
Abstract: An ellipsometer uses a broadband light source and a Fresnel cone to produce a simultaneous broadband polarization state generator with no moving parts. The detector of the ellipsometer includes a diffractive element to spatially separate the wavelengths of the light from the sample. The wavelengths may be spatially separated sufficiently that there is no overlap of bands of wavelengths when imaged by a two-dimensional sensor or may be temporally separated. Additionally, the detector separates and simultaneously analyzes the polarizations states of the light from the sample so there is no overlap of polarization states when imaged by a two-dimensional sensor and no moving parts are used. The resulting image with separated wavelengths and polarization states may be used to determine at least a partial Mueller matrix for the sample.
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公开(公告)号：US11346768B1
公开(公告)日：2022-05-31
申请号：US17110214
申请日：2020-12-02
Applicant: Onto Innovation Inc.
Inventor： Kenneth E. James , John F. Lesoine , Pedro Vagos
Abstract: An optical metrology device uses a multi-wavelength beam of light that has azimuthally varying polarization states and/or phase states, referred to as a vortex beam. The metrology device focuses the vortex beam on a sample under test over a large range of angles of incidence. The metrology device may detect an image of the vortex beam reflected from the sample and measure the polarization state of the return light as function of the angle of incidence and the azimuth angle, which may be further measured at a plurality of different wavelengths. The vortex beam includes azimuthally varying polarization states, thereby enabling measurement of all desired polarization states without requiring the use of moving optical components. The polarization state information detected over multiple angles of incidence and wavelengths provides data with which an accurate determination of one or more characteristics of a sample may be determined.
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公开(公告)号：US20220082385A1
公开(公告)日：2022-03-17
申请号：US17244962
申请日：2021-04-30
Applicant: ZHEJIANG UNIVERSITY
Inventor： Kaichen SONG , Jinlong YU , Lingyun YE , Ju WANG
Abstract: A polarization-maintaining fully-reciprocal bi-directional optical carrier microwave resonance system and an angular velocity measurement method thereof. In the system, highly stable optical carrier microwaves are generated in a clockwise direction and a counterclockwise direction in the same resonant cavity, and are used to measure the angular velocity of rotation of a carrier apparatus. A fully reciprocal ring-shaped resonant cavity structure is used to achieve a fully reciprocal bi-directional optical resonance system. A polarization state separation technique is used to separate an optical signal into two wavelengths, and optical signals with perpendicular polarization states are transmitted in opposite directions in a sensing ring, thereby improving the measurement capability of the sensing ring. Bi-directional optical carrier microwave resonance is achieved by using a phase tracking structure and a regenerative mode locking technique. A cavity length control technique is used to lock the oscillation frequency of microwaves in one of the directions to a highly stable standard time reference source, thereby achieving a stable relative cavity length of an optical resonant cavity. The described key techniques greatly improve the signal-to-noise ratio of bi-directional oscillation difference frequency signals caused by the Sagnac effect. The system and the method are practical and have high measurement precision.
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公开(公告)号：US11262293B2
公开(公告)日：2022-03-01
申请号：US16483877
申请日：2018-02-08
Applicant: Ralfy Kenaz
Inventor： Ronen Rapaport , Ralfy Kenaz
Abstract: System and method for use in optical monitoring of a sample. The system comprising: a light source unit (140) for providing collimated illumination; polarization modulation unit (160) located in optical path of light propagating from the light source unit; a lens unit (120) for focusing light onto an illumination spot on a surface of a sample, and for collection of light components returning from the sample; a light collection unit configured for collecting light returning from the sample and generate output image data associated with Fourier plane imaging with respect to surface of the sample; and a control unit (500) configured processing said data in accordance with said system calibration. The method provides calibration data, and comprising: providing reference data indicative of complex refractive index of the reference samples on at least two reference samples; collecting ellipsometry data for said at least two reference samples using the ellipsometry system, generating output data having a plurality of data pieces, each associated with unknown angular direction; and for each data piece corresponding to an unknown angular direction, determining simultaneously system parameters and angle of incidence in accordance with corresponding parameters of the reference data to thereby determine calibration data.
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公开(公告)号：US20220057339A1
公开(公告)日：2022-02-24
申请号：US17413895
申请日：2019-12-18
Inventor： Jean LILENSTEN , Sylvain ROCHAT
Abstract: A method for analysing radiation emitted by the upper atmosphere, including the steps of collecting a beam coming from a direction (h, A) of the atmosphere, polarising the collected beam, selecting at least one frequency range of the collected beam and measuring an intensity of the at least one frequency range of the collected and polarised beam (I(θ,t)) according to the angle θ(t). The method includes the step of determining, from the values of I(θ,t) collected on a rotation of at least Π/2 radians of the variable angle polariser:—at least one physical and/or chemical and/or electromagnetic parameter of the upper atmosphere, and/or a variation of at least one physical and/or chemical and/or electromagnetic parameter of the upper atmosphere, and/or—a probability of malfunction and/or degradation of networks and/or electrical and/or electronic equipment and/or systems and/or devices.
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