公开(公告)号：US20210333151A1

公开(公告)日：2021-10-28

申请号：US17271162

申请日：2019-09-17

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Masashi Miyata ,  Mitsumasa Nakajima ,  Toshikazu Hashimoto

IPC: G01J4/04 ,  G02B5/30

Abstract: A polarization imaging image-pickup system includes an image-pickup unit array that includes a plurality of image-pickup units arranged two-dimensionally, wherein the image-pickup units each include: one wavefront control element that includes a plurality of microscopic structures; and a pixel array that is arranged so as to face the wavefront control element, and includes a plurality of pixels that are associated with the wavefront control element and are two-dimensionally arranged, and light from an imaging object is spatially separated by the one wavefront control element into first polarized light, and a second polarized light that is in a direction orthogonal to the first polarized light or has a rotation direction opposite to a rotation direction of the first polarized light, the first polarized light is collected at a first collection position on the pixel array, and the second polarized light is collected at a second collection position on the pixel array.

公开(公告)号：US20210333150A1

公开(公告)日：2021-10-28

申请号：US17238636

申请日：2021-04-23

Applicant: Facebook Technologies, LLC

Inventor： Scott Charles McEldowney ,  Xinqiao Liu ,  Qing Chao

IPC: G01J4/04

Abstract: In one example, an apparatus comprises a plurality of sub-pixels arranged sideway, a shared optical element positioned over the plurality of sub-pixels, the shared optical element being configured to direct light originating from a same location in a scene to each sub-pixel in the plurality of sub-pixels; one or more polarizers positioned between the shared optical element and one or more first sub-pixels of the plurality of sub-pixels and configured to selectively pass one or more components of the light having one or more pre-determined polarization states, to enable the photodiodes of each of the one or more first sub-pixels to generate signals based on intensities of the one or more components; and one or more processors configured to generate polarimetric measurements of the received light based on signals obtained from the photodiodes of the one or more first sub-pixels and polarization properties of the one or more polarizers.

公开(公告)号：US20210323644A1

公开(公告)日：2021-10-21

申请号：US16849375

申请日：2020-04-15

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Michael J. DeWeert ,  Reid A. Noguchi

IPC: B63G8/00 ,  B63G8/38 ,  G01J4/04 ,  G05D1/00 ,  G05D1/02

Abstract: Underwater navigational systems and methods utilizing sunlight polarized via scattering through the water column that does not require an underwater vehicle to surface or use a global position system to maintain precise navigational positions and headings. These navigational systems and methods may be employed by manned or unmanned underwater vehicles and may be utilized by individual units and by units operating in a swarm.

公开(公告)号：US11125679B2

公开(公告)日：2021-09-21

申请号：US16929144

申请日：2020-07-15

Applicant: ROLLS-ROYCE plc

Inventor： James R. Fortune

IPC: G01N21/21 ,  G01J4/04 ,  G01N33/2045 ,  F01D21/00 ,  G01N21/95 ,  G01N21/88 ,  G01N21/84

Abstract: A method of analysing a component formed from a metal alloy to identify a possible defect, wherein the metal alloy comprises a first crystal grain region and the possible defect comprises a second crystal grain region aligned to a different axis to the first crystal grain region, the method comprising the steps of: obtaining a first image of the component illuminated using a first polarisation state of light, the first image comprising first polarisation data; obtaining a second image of the component illuminated using a second polarisation state of light different to the first polarisation state, the second image comprising second polarisation data; determining a difference in polarisation data for plural pixels of the first image between each pixel of the first image and a corresponding pixel of the second image; and identifying pixels corresponding to the second crystal grain region based on the difference in polarisation data.

公开(公告)号：US20210263070A1

公开(公告)日：2021-08-26

申请号：US17266568

申请日：2019-08-02

Applicant: Norik JANUNTS

Inventor： Norik JANUNTS

IPC: G01Q60/22 ,  G01J1/04 ,  G01J1/42 ,  G01J3/02 ,  G01J4/04 ,  G01Q70/06 ,  G02B6/42

Abstract: The invention is directed to an arrangement for detecting the intensity distribution of components of the electromagnetic field in beams of radiation. The object of the invention is met, according to the invention, in that a high-resolution two-dimensional intensity sensor array and a field vector detector array comprising different regions with individual detector structures for two transverse and longitudinal field vector components Ex, Ey, Ez are combined, wherein the detector structures are formed as nanostructures, metallic jacket-shaped tips with different apices, for utilization of localized plasmon resonance (LPR) of the individual detector structures and localized surface plasmons (LSP) excited through LPR for a polarization selection of the field distribution according to field vector components Ex, Ey, Ez and transmission thereof to associated sensor elements by means of surface plasmon polaritons (SPP) and wave guiding (WGM).

公开(公告)号：US20210239893A1

公开(公告)日：2021-08-05

申请号：US17009029

申请日：2020-09-01

Applicant: Lawrence Livermore National Security, LLC

Inventor： Jean-Michel Di Nicola ,  Alvin Erlandson ,  Joseph A. Menapace ,  Gabriel Mennerat

IPC: G02B5/30 ,  G01J4/04

Abstract: Technology is provided to transform spatially variable arbitrary polarization states and wavefront of a high-fluence, large-aperture laser beam to prescribed spatially resolved polarization states and wavefront at a specific position, with minimal losses. Technology is also provided to transform spatially resolved polarization states and wavefront at a specific position to spatially variable arbitrary polarization states and wavefront.

公开(公告)号：US11067450B2

公开(公告)日：2021-07-20

申请号：US16404600

申请日：2019-05-06

Applicant: University of South Florida

Inventor： Zhimin Shi ,  Darrick Hay ,  Ziyi Zhu ,  Yiyu Zhou ,  Robert W. Boyd

IPC: G01J4/04 ,  G01J11/00

Abstract: An apparatus measures the transverse profile of vectorial optical field beams, including both the phase and the polarization spatial profile. The apparatus contains a polarization separation module, a weak perturbation module, and a detection module. Characterizing the transverse profile of vector fields provides an optical metrology tool for both fundamental studies of vectorial optical fields and a wide spectrum of applications, including microscopy, surveillance, imaging, communication, material processing, and laser trapping.

公开(公告)号：US11050505B1

公开(公告)日：2021-06-29

申请号：US16791249

申请日：2020-02-14

Applicant: General Dynamics Mission Systems, Inc.

Inventor： Nathaniel Jones ,  Stephanie Novak ,  Edward Rowe

IPC: H04J14/06 ,  G01J4/04 ,  H04L27/227 ,  G06K9/62 ,  H04B10/61 ,  H04B10/2507

Abstract: An optical communication system is configured to transmit and receive at least four multiplexed, differently-polarized, optically-transmitted signals. Each signal is associated with a predefined state of polarization. An optical transmitter is configured to transmit multiplexed, differently polarized, optically transmitted signals. An optical receiver is configured to receive the optically transmitted signals. The system includes a multi-polarization analyzer circuit configured to obtain an analyzed signal for each of the polarized signals in Stokes space. The analyzer circuit is configured to determine if the multiplexed signal has been transformed by extreme polarization-dependent loss (PDL), the receiver correcting for the extreme polarization-dependent loss.

公开(公告)号：US20210152748A1

公开(公告)日：2021-05-20

申请号：US17044533

申请日：2019-01-15

Applicant: SONY CORPORATION

Inventor： YING LU ,  YASUTAKA HIRASAWA ,  YUHI KONDO ,  TUO ZHUANG ,  LEGONG SUN

IPC: H04N5/243 ,  H04N5/235 ,  H04N17/00 ,  G06T7/80 ,  H04N5/225 ,  G01J4/04 ,  G01N21/21

Abstract: A polarization imaging unit 20 acquires a polarization image using a lens. In a parameter storage unit 32 of an information processing unit 30, parameters related to a change in polarization state due to the lens which are estimated in advance from polarization state information acquired by imaging a light source in a predetermined polarization state using the lens and polarization state information indicating the polarization state of the light source, for example, change parameters indicating the change in polarization state due to the lens or correction parameters for correcting the change in polarization state due to the lens are stored. A polarization state correction unit 33 of the information processing unit 30 corrects the change in polarization state due to the lens, using the parameters stored in advance in the parameter storage unit 32.

公开(公告)号：US20210148811A1

公开(公告)日：2021-05-20

申请号：US17097979

申请日：2020-11-13

Applicant: MONTANA STATE UNIVERSITY

Inventor： Joseph A. SHAW ,  Laura M. ESHELMAN

IPC: G01N21/21 ,  G01J4/04 ,  G06T7/40 ,  G06K9/00

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.