公开(公告)号：US3157727A

公开(公告)日：1964-11-17

申请号：US9525861

申请日：1961-03-13

Applicant: MASSACHUSETTS INST TECHNOLOGY

Inventor： HARDY ARTHUR C ,  FOPIANO PAUL J ,  TRAGESER MILTON B

IPC: G01J4/04

CPC classification number: G01J4/04

公开(公告)号：US3001439A

公开(公告)日：1961-09-26

申请号：US69039557

申请日：1957-10-15

Applicant: DAYSTROM INC

Inventor： ANTOINE ROUY AUGUSTE LOUIS MAR

IPC: G01J4/04

CPC classification number: G01J4/04

公开(公告)号：US20250116599A1

公开(公告)日：2025-04-10

申请号：US18863742

申请日：2023-05-08

Applicant: The Regents of the University of Michigan

Inventor： Nicholas A. KOTOV

IPC: G01N21/21 ,  G01J4/04 ,  G01J5/59 ,  G06V10/764 ,  G06V20/58 ,  H04N23/11

Abstract: Systems and methods for object and material recognition are provided and include a hyperspectral infrared camera that captures a three-dimensional image of an object and black-body emissions data indicating a polarization of black-body radiation emitted from the object. An image processing device accesses a database of expected polarization signatures of black-body emissions from materials at different temperatures and determines a material of the object based on (i) the black-body emissions data indicating the polarization of the black-body radiation emitted from the object, (ii) an ambient temperature of the environment of the system, and (iii) the database of expected polarization signatures of black-body emissions from a plurality of materials for different temperatures.

公开(公告)号：US20240418570A1

公开(公告)日：2024-12-19

申请号：US18748614

申请日：2024-06-20

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY

Inventor： Yu Yao ,  Chao Wang ,  Chu Wang ,  Jing Bai ,  Ali Basiri ,  Xiahui Chen

IPC: G01J4/04 ,  G02B5/30

Abstract: A method of fabricating a polarization sensor is described. It includes a quarter-wave plate to convert circularly polarized light into linearly polarized light. The quarter-wave plate is realized as a metasurface. The sensor also includes a linear polarizer to analyze the light generated by the quarter wave plate, and a photodetector to receive the analyzed light. The sensor may be combined with other linear polarization sensors to form a sensor capable of complete measurement of the polarization state of incident light.

公开(公告)号：US20240418569A1

公开(公告)日：2024-12-19

申请号：US18460389

申请日：2023-09-01

Applicant: University of Southern California

Inventor： Mercedeh Khajavikhan ,  Fugu Tian

IPC: G01J4/04

Abstract: Weyl semimetal-based polarimeters are disclosed that can uniquely map the polarization state of light on the Poincaré sphere.

公开(公告)号：US12169144B2

公开(公告)日：2024-12-17

申请号：US17636730

申请日：2020-08-20

Applicant: Arizona Board of Regents on Behalf of the University of Arizona

Inventor： Rongguang Liang ,  Jian Liang

IPC: G01J4/04 ,  G01J3/02 ,  G01J3/447

Abstract: Methods, apparatus and systems that relate to a low-cost reconfigurable polarimetric imaging are described. One example polarization imaging system includes a lens positioned to receive light reflected from one or more objects, and a spectral-polarization filter positioned at an aperture plane of the lens to filter the light received by the lens. The polarization imaging system can further include a sensor positioned to detect the filtered light from the spectral-polarization filter to form a polarization image of the one or more objects. The spectral-polarization filter comprises a first array of multiple spectral filters and a second array of multiple polarizers.

公开(公告)号：US20240402016A1

公开(公告)日：2024-12-05

申请号：US17479927

申请日：2021-09-20

Applicant: Raytheon Company

Inventor： Eric Rogala ,  Gerald P. Uyeno

IPC: G01J4/04 ,  G02B26/08 ,  G02B27/28

Abstract: An image polarimeter includes a MEMS MMA divided into two or more segments in which the mirrors in each segment are provided with a polarizer of a given polarization. The mirrors in each segment are tipped and tilted to steer polarized light onto different portions of an optical detector. In certain configurations the mirrors may also be pistoned to reduce aberrations. Each frame that is read out from the detector includes two or more distinct component polarized images having different polarizations P0, P2, . . . of the same scene to fully characterize the polarization properties of the scene. Since the mirrors only tip/tilt/piston in the dead period between frames, no components are moving during image acquisition and co-registration of the component polarized images is simple. The number of segments and the different polarizations may be selected to implement Jones calculus, Mueller calculus and Stokes parameters or other polarimetry techniques.

公开(公告)号：US12136997B2

公开(公告)日：2024-11-05

申请号：US17914442

申请日：2021-03-04

Applicant: NEC Corporation

Inventor： Masaki Sato

IPC: H04J14/06 ,  G01J4/04 ,  H04B10/2507 ,  H04B10/079 ,  H04B10/61

Abstract: In order to estimate a polarization fluctuation speed with high accuracy independently of the quality of a received signal, a polarization-fluctuation estimating device according to the present invention includes: a polarization de-multiplexing unit that generates a single-polarization optical signal from an input polarization-multiplexed optical signal; a photoelectric converting unit that converts the generated optical signal into an electrical signal; and an estimation unit that estimates the polarization fluctuation speed of the polarization-multiplexed optical signal in accordance with the electrical signal.

公开(公告)号：US12101583B2

公开(公告)日：2024-09-24

申请号：US17059353

申请日：2019-03-13

Applicant: SONY CORPORATION

Inventor： Hajime Mihara ,  Shun Kaizu ,  Teppei Kurita ,  Yasutaka Hirasawa

IPC: H04N9/31 ,  G01J4/04 ,  G02B27/28 ,  G06T5/70 ,  H04N23/81 ,  H04N25/11 ,  H04N25/671

CPC classification number: H04N9/3167 ,  G01J4/04 ,  G02B27/283 ,  G06T5/70 ,  H04N23/81 ,  H04N25/11 ,  H04N25/671

Abstract: An information generation unit 30 acquires, from a polarization imaging unit 20, observation values in which polarization directions are at least three or more directions (m≥3). A noise amount calculation unit 35-1 calculates an amount of noise on the basis of an observation value in a first polarization direction. Similarly, noise amount calculation units 35-2 to 35-m calculate amounts of noise on the basis of observation values in second to m-th polarization directions. A polarization model estimation unit 36 estimates a polarization model by using the observation values for the respective polarization directions and the amounts of noise calculated by the noise amount calculation units 35-1 to 35-m. Thus, it is possible to calculate a polarization model that is robust against noise.

公开(公告)号：US12078834B2

公开(公告)日：2024-09-03

申请号：US17603574

申请日：2020-04-14

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Noah A. Rubin ,  Federico Capasso

IPC: G01J4/04 ,  G02B1/00 ,  G02B5/18 ,  G02B5/30 ,  G02B27/42

CPC classification number: G02B5/3083 ,  G01J4/04 ,  G02B1/002 ,  G02B5/1833 ,  G02B27/4261

Abstract: An optical component includes a substrate and a metasurface comprising one or more linearly birefringent elements. The linearly birefringent elements define a grating configured to implement parallel polarization analysis for a plurality of polarization orders for incident light of an arbitrary polarization.