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公开(公告)号：US20230136247A1
公开(公告)日：2023-05-04
申请号：US18048553
申请日：2022-10-21
Abstract: A circular polarization filter of a chiral metasurface structure is disclosed including a substrate having a nanograting pattern extending from the substrate, a dielectric layer formed directly on the nanograting pattern, and a plasmonic structure in direct contact with the dielectric layer, where the plasmonic structure may be oriented at a nonzero angle with respect to the nanograting pattern. An integrated polarization filter array is also disclosed including include a linear polarization filter, and a circular polarization filter. Methods of detecting full-stokes polarization using an integrated polarization filter array having both linear and circular polarization filters made from chiral metasurface structures is disclosed. Methods of using a Mueller matrix to evaluate polarization response of any optical device or system is also disclosed.
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公开(公告)号：US20230034139A1
公开(公告)日：2023-02-02
申请号：US17786545
申请日：2020-12-22
Applicant: Sony Group Corporation
Inventor： Piergiorgio SARTOR , Alexander GATTO , Zoltan FACIUS , Matthias SCHINZEL , Markus KAMM
Abstract: The present disclosure generally pertains to a polarization imaging system having: an imaging portion having a color channel element of a first color type and a color channel element of a second color type; and a light polarization portion configured to: provide a first light polarization of a first polarization type for the first color type and a second light polarization of the first polarization type for the second color type; and convert a second polarization type into the first polarization type, whereby the second polarization type is detectable in the imaging portion
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63.发明申请公开(公告)号：US20220404198A1
公开(公告)日：2022-12-22
申请号：US17750264
申请日：2022-05-20
Applicant: Joseph Daniel Vance
Inventor： Joseph Daniel Vance
Abstract: A light frequency standard for use as an optical clock is disclosed that is improved by optical pumping. Optical pumping is utilized to change the ground states of the atomic vapor from transition forbidden to transition allowed ground states involved in two-photon absorption process. The added element of an optical pump increases the absorbers available in the two-photon process and creates a stronger absorption line signal used for locking the laser to an absolute frequency.
An optical spectrometer based upon two-photon absorption is disclosed that is improved by optical pumping. In this case, two optical pumps are used, One optical pump provides photons for two-photon absorption, but it also depletes absorbing atoms that are in ground states where two-photon absorption is allowed. The other optical pump replenishes the supply of absorbing atoms into ground states allowing two-photon absorption. The spectrometer is useful for measuring Doppler shift with LIDAR.-
公开(公告)号：US11499910B2
公开(公告)日：2022-11-15
申请号：US17377096
申请日：2021-07-15
Inventor： Yamuna Phal , Kevin Lee Yeh , Rohit Bhargava
Abstract: Methods and apparatus for obtaining a vibrational circular dichroism (VCD) image using a discrete frequency infrared (DFIR) microscope are disclosed. The method includes generating a pulsed laser beam comprising a spectral frequency, which may be tunable; modulating the laser beam to generate circularly polarized light; illuminating a sample and collecting, and detecting an optical signal transmitted or transflected from the location of the sample. The detected signal is demodulated at, for example, both the pulse frequency and the sum or difference of the pulse frequency and the modulating frequency to obtain an intensity value that correspond to the absorbance, and a polarization-dependent value that corresponds to the VCD. Other configurations of the apparatus may be employed to measure VCB and VLD.
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公开(公告)号：US11277552B2
公开(公告)日：2022-03-15
申请号：US16924256
申请日：2020-07-09
Applicant: CANON KABUSHIKI KAISHA
Inventor： Keita Nakamura
IPC: H01L27/146 , H04N5/225 , H04N9/04 , G01J3/447
Abstract: An image sensor includes a first and a second polarizing pixels in each of which transmission axis direction is different. Each of the first and second polarizing pixels has a same wavelength characteristic in transmittance, and has a sensitivity to a first and a second wavelength bandwidths. In each of the first and second polarizing pixels, a ratio of the transmittance in the transmission axis direction in the first and second wavelength bandwidths to a maximum value of the transmittance in the transmission axis direction in all wavelength bandwidths is 0.5 or more. In one of the first and second wavelength bandwidths, a ratio of the transmittance in a direction orthogonal to the transmission axis direction to the transmittance in the transmission axis direction is 0.5 or less, and in the other, the ratio is 0.5 or more.
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Patent Agency Ranking
66.发明申请公开(公告)号：US20220057266A1
公开(公告)日：2022-02-24
申请号：US17518761
申请日：2021-11-04
Applicant: Purdue Research Foundation
Inventor： Garth Jason Simpson , Chen Li , Changqin Li
Abstract: A method for phase contrasting-correlation spectroscopy: converting an incident linearly polarized light into two polarized components (polarized divergent and convergent components, wherein the polarized divergent component is orthogonal to the polarized convergent component), focusing each of the polarized divergent component and the polarized convergent component into a focal plane, thereby producing two focus planes constituting a reference focus (RF) plane and a sample focus (SF) plane; placing a sample at the SF plane and ambient conditions of the sample at the RF plane, resulting in a phase shift between the two polarized components; reconstituting the two phase-shifted polarized components into a phase-shifted linearly polarized light; detecting the phase-shifted linearly polarized light; calculating phase and intensity of the sample from the phase-shifted linearly polarized light; establishing an autocorrelation of phase and intensity of the phase-shifted linearly polarized light; and generating correlograms of intensity and phase of the phase-shifted linearly polarized light.
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公开(公告)号：US20220018759A1
公开(公告)日：2022-01-20
申请号：US17377096
申请日：2021-07-15
Inventor： Yamuna PHAL , Kevin Lee YEH , Rohit BHARGAVA
Abstract: Methods and apparatus for obtaining a vibrational circular dichroism (VCD) image using a discrete frequency infrared (DFIR) microscope are disclosed. The method includes generating a pulsed laser beam comprising a spectral frequency, which may be tunable; modulating the laser beam to generate circularly polarized light; illuminating a sample and collecting, and detecting an optical signal transmitted or transflected from the location of the sample. The detected signal is demodulated at, for example, both the pulse frequency and the sum or difference of the pulse frequency and the modulating frequency to obtain an intensity value that correspond to the absorbance, and a polarization-dependent value that corresponds to the VCD. Other configurations of the apparatus may be employed to measure VCB and VLD.
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公开(公告)号：US11162844B2
公开(公告)日：2021-11-02
申请号：US16291255
申请日：2019-03-04
Applicant: Surface Optics Corporation
Inventor： Kyle Ryan McCormick , Jaclyn Nascimento , Mark Dombrowski
Abstract: The present invention is a camera with video-rate acquisition and processing for medical imaging applications. In particular, the invention is used to determine the health of a body area by quantitatively measuring blood oxygen levels and melanin content from a real-time video image of a body segment. In certain embodiments, a camera comprises an objective lens; a filter tray located at an aperture stop of the objective lens, wherein the filter tray comprises a plurality of elements, each element passes a spectral band of light; a micro-lens array located at an exit pupil of the objective lens comprising a plurality of micro lenses to form an image plane, wherein the objective lens produces a focused image at the image plane; and a focal plane array comprising a plurality of sensors, wherein each sensor receives light from at least one micro-lens of the micro-lens array.
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公开(公告)号：US11119038B1
公开(公告)日：2021-09-14
申请号：US16845962
申请日：2020-04-10
Applicant: Texas Instruments Incorporated
Inventor： Argyrios Dellis , Adam Joseph Fruehling , Bichoy Bahr , Juan Herbsommer
IPC: G01N21/3581 , G01J3/447 , G01J3/42 , G01J3/10
Abstract: A millimeter wave molecular sensor system is provided. The system includes a physics cell configured to contain a sample, a directional coupler configured to receive input millimeter waves, partition the input millimeter waves into a pump signal and a probe signal for transfer to the physics cell, a receiver configured to receive millimeter waves exiting the physics cell, a Faraday rotator coupled between a pump transmitter and the physics cell, and a coupling iris coupled between the Faraday rotator and the physics cell, configured to pass millimeter waves having a first polarization into the physics cell. The Faraday rotator includes a Faraday material, and an electronic device configured to apply a magnetic field to the Faraday material parallel to a propagation direction of the millimeter waves such that when the electronic device is activated, the Faraday material rotates a polarization of the millimeter waves passing through the Faraday rotator.
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公开(公告)号：US20210172797A1
公开(公告)日：2021-06-10
申请号：US16291255
申请日：2019-03-04
Applicant: Surface Optics Corporation
Inventor： Kyle Ryan McCormick , Jaclyn Nascimento , Mark Dombrowski
IPC: G01J3/28 , G01J3/02 , G01J3/447 , A61B5/1455
Abstract: The present invention is a camera with video-rate acquisition and processing for medical imaging applications. In particular, the invention is used to determine the health of a body area by quantitatively measuring blood oxygen levels and melanin content from a real-time video image of a body segment. In certain embodiments, a camera comprises an objective lens; a filter tray located at an aperture stop of the objective lens, wherein the filter tray comprises a plurality of elements, each element passes a spectral band of light; a micro-lens array located at an exit pupil of the objective lens comprising a plurality of micro lenses to form an image plane, wherein the objective lens produces a focused image at the image plane; and a focal plane array comprising a plurality of sensors, wherein each sensor receives light from at least one micro-lens of the micro-lens array.
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