公开(公告)号：US20220316945A1

公开(公告)日：2022-10-06

申请号：US17640225

申请日：2020-08-28

Applicant: NATIONAL UNIVERSITY CORPORATION KAGAWA UNIVERSITY

Inventor： Ichiro ISHIMARU

IPC: G01J3/02 ,  G01J3/453

Abstract: A spectrometry device wherein light rays emitted from an object face measurement point combine into one parallel light beam by an objective lens, this is divided into a first and second light beam by a phase shifter, and the first and second light beam emit toward a light-receiving face of a photodetector while providing an optical path length difference. A light-shielding plate is arranged on a face optically conjugate the object face respective to the objective lens, and only light passed through translucent portions of the light-shielding plate is directed to the objective lens. A lateral length of each light-shielding plate translucent portion and the interval between two adjacent translucent portions are based on the objective lens focal length, the distance from the phase shifter to the photodetector light-receiving face, a photodetector pixel pitch, a pixel length, and a predetermined wavelength range of the light emitted from the measurement point.

公开(公告)号：US11454541B2

公开(公告)日：2022-09-27

申请号：US17181411

申请日：2021-02-22

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Fabian Steinlechner ,  Marta Gilaberte Basset ,  Markus Gräfe

IPC: G01B9/02 ,  G01J3/453 ,  G01J3/02 ,  G01J3/28

Abstract: A system and method is provided for imaging and/or spectroscopy involving generation of a first signal field and a first idler field, illumination of the object with the first idler field, generation of second signal field and a second idler field, combination of the first and second idler fields, such that the two fields are indistinguishable, combination of the first and second signal fields, such that the two fields interfere, first measurement of the interfered signal field by a detection means, one or more additional measurements of the interfered signal field, wherein for each additional measurement a different phase shift is generated in the setup, and wherein all measurements are carried out within the stability time of the setup, and calculation of a phase function.

公开(公告)号：US11415460B2

公开(公告)日：2022-08-16

申请号：US16989741

申请日：2020-08-10

Applicant: University of Hawaii

Inventor： Paul Lucey

IPC: G01J3/26 ,  G01J3/453 ,  G01J3/14

Abstract: A spatial Fourier transform spectrometer is disclosed. The Fourier transform spectrometer includes a Fabry-Perot interferometer with first and second optical surfaces. The gap between the first and second optical surfaces spatially varies in a direction that is orthogonal to the optical axis of the Fourier transform spectrometer. The Fabry-Perot interferometer creates an interference pattern from input light. An image of the interference pattern is captured by a detector, which is communicatively coupled to a processor. The processor is configured to process the interference pattern image to determine information about the spectral content of the input light.

公开(公告)号：US11307097B1

公开(公告)日：2022-04-19

申请号：US17069020

申请日：2020-10-13

Applicant: ABB Schweiz AG

Inventor： Florent M. Prel ,  Frederic J. Grandmont ,  Louis M. Moreau ,  Eric A. Carbonneau ,  Martin C. Larouche

IPC: G01J3/453 ,  G01J3/28 ,  G01J3/45

Abstract: Technologies for a high resolution and wide swath spectrometer are disclosed. In the illustrative embodiment, an inverted image slicer converts a linear field of view into a grid shape, allowing for an interferometer of a Fourier transform spectrometer to operate on a narrow range of field of views, improving the average spectral resolution of the spectrometer.

公开(公告)号：US11300452B2

公开(公告)日：2022-04-12

申请号：US16619893

申请日：2018-06-06

Applicant: Ushio Denki Kabushiki Kaisha

Inventor： Aya Ota ,  Toshio Yokota

IPC: G01J3/45 ,  G01N21/35 ,  G01J3/453 ,  G01J3/457

Abstract: A new spectral measurement technique is provided which enables measurement even if the light to be measured exists for a very short period. In one embodiment, a broadband pulsed light wave whose wavelength shifts temporally and continuously in a pulse interferes with a light wave to be measured. The intensity at each wavelength of the light wave to be measured is obtained using a Fourier transform of the output signal from a detector that has detected the intensity of the wave resulting from the interference. A laser beam from a laser source is converted to a supercontinuum wave by a nonlinear optical element, and a pulse extension element extends pulses of the supercontinuum wave, thus generating the broadband pulsed light wave.

公开(公告)号：US11241156B2

公开(公告)日：2022-02-08

申请号：US17135233

申请日：2020-12-28

Applicant: Omni Medsci, Inc.

Inventor： Mohammed N. Islam

IPC: G01J3/00 ,  A61B5/00 ,  A61C19/04 ,  G16Z99/00 ,  G16H40/67 ,  A61B5/145 ,  A61B5/1455 ,  G01J3/02 ,  G01J3/10 ,  G01J3/14 ,  G01J3/28 ,  G01J3/42 ,  G01J3/453 ,  G01N21/35 ,  G01N21/3563 ,  G01N21/359 ,  G01N21/39 ,  G01N21/88 ,  G01N33/02 ,  G01N33/15 ,  G01N33/44 ,  G01N33/49 ,  H01S3/067 ,  H01S3/00 ,  A61C1/00 ,  G01J3/18 ,  G01J3/12 ,  G01M3/38 ,  G01N21/85 ,  G01N21/95 ,  H01S3/30

Abstract: A measurement system is provided with an array of laser diodes with one or more Bragg reflectors. At least a portion of the light generated by the array is configured to penetrate tissue comprising skin. A detection system configured to: measure a phase shift, and a time-of-flight, of at least a portion of the light from the array of laser diodes reflected from the tissue relative to the portion of the light generated by the array; generate one or more images of the tissue; detect oxy- or deoxy-hemoglobin in the tissue; non-invasively measure blood in blood vessels within or below a dermis layer within the skin; measure one or more physiological parameters based at least in part on the non-invasively measured blood; and measure a variation in the blood or physiological parameter over a period of time.

公开(公告)号：US20220007933A1

公开(公告)日：2022-01-13

申请号：US17473839

申请日：2021-09-13

Applicant: AdOM, ADVANCED OPTICAL TECHNOLOGIES LTD.

Inventor： Yoel ARIELI ,  Yoel COHEN ,  Shlomi EPSTEIN ,  Dror ARBEL ,  Ra'anan GEFEN

IPC: A61B3/10 ,  A61B3/00 ,  G01J3/45 ,  G01B11/06 ,  G01B9/02 ,  A61B3/15 ,  G01J3/02 ,  G01J3/453

Abstract: Apparatus and methods are described for performing tear film structure measurement on a tear film of an eye of a subject. A broadband light source (100) is configured to generate broadband light. A spectrometer (250) is configured to measure a spectrum of light of the broadband light that is reflected from at least one spot on the tear film, the spot having a diameter of between 100 microns and 240 microns. A computer processor (28) is coupled to the spectrometer and configured to determine a characteristic of the tear film based upon the spectrum of light measured by the spectrometer. Other applications are also described.

公开(公告)号：US11215504B2

公开(公告)日：2022-01-04

申请号：US17089518

申请日：2020-11-04

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Jiangquan Mai

IPC: G01J3/02 ,  G02B19/00 ,  G02B5/30 ,  G01J3/453

Abstract: Systems and methods which provide a high-throughput point source light coupling structure implementing a condenser configured according to one or more condenser configuration rules are described. Embodiments of a high-throughput point source light coupling structure utilize a birefringent plate configuration in combination with a condenser and point source to provide a light coupler structure for a birefringent-static-Fourier transform interferometer implementation. According to some examples, the optical axis of a first and second birefringent plate of a birefringent plate configuration are not in the same plane. A condenser of a high-throughput point source light coupling structure of embodiments is provided in a defined (e.g., spaced, relational, etc.) relationship with respect to the point source and/or a camera lens used in capturing an interference pattern generated by the light coupling structure. High-throughput point source light coupling structures herein may be provided as external accessories for processor-based mobile devices having image capturing capabilities.

公开(公告)号：US11160455B2

公开(公告)日：2021-11-02

申请号：US17078771

申请日：2020-10-23

Applicant: OMNI MEDSCI, INC.

Inventor： Mohammed N. Islam

IPC: G01J3/00 ,  A61B5/00 ,  A61B5/145 ,  A61B5/1455 ,  G16H40/67 ,  G06F19/00 ,  G01J3/02 ,  G01J3/10 ,  G01J3/14 ,  G01J3/28 ,  G01J3/42 ,  G01J3/453 ,  G01N21/35 ,  G01N21/3563 ,  G01N21/359 ,  G01N21/39 ,  G01N21/88 ,  G01N33/02 ,  G01N33/15 ,  G01N33/44 ,  G01N33/49 ,  G01J3/18 ,  G01J3/12 ,  G01M3/38 ,  G01N21/85 ,  G01N21/95 ,  H01S3/00 ,  H01S3/067 ,  H01S3/30

Abstract: A system for measuring one or more physiological parameters is provided with a wearable device that includes a light source comprising a driver and a plurality of semiconductor sources that generate an output optical light. The wearable device comprises: one or more lenses to receive at least a portion of the output optical light and to deliver a lens output light to tissue, and a detection system to receive at least a portion of the lens output light reflected from the tissue and to generate an output signal having a signal-to-noise ratio, and to be synchronized to the light source. The detection system comprises at least one analog to digital converter coupled to at least one spatially separated detector. The plurality of semiconductor sources comprises six light emitting diodes, and wherein the plurality of semiconductor sources and the plurality of spatially separated detectors are located on one or more arcs.

公开(公告)号：US11156549B2

公开(公告)日：2021-10-26

申请号：US16597533

申请日：2019-10-09

Applicant: PerkinElmer Singapore PTE Limited

Inventor： Ralph Lance Carter ,  Robert Alan Hoult

IPC: G01N21/35 ,  G01J3/02 ,  G01J3/453 ,  G01N21/47 ,  G01J3/08

Abstract: Diffuse reflectance spectroscopy apparatus for use in analysing a sample comprising a sample receiving location 2 for receiving a sample 3 for analysis; an illumination arrangement 4 for directing light towards a received sample; a detector 6 for detecting light reflected by a received sample; and collection optics 5 for directing light reflected by a received sample towards the detector. The illumination arrangement further comprises an interferometer 42 and a half beam block 45a, 45b which is disposed substantially at a focus in the optical path for blocking light which exits the interferometer, passes said focus, and is reflected from re-entering the interferometer. A half beam block 45a may be disposed in the optical path between the interferometer and the light source 41 for blocking light that exits the interferometer back towards the light source and is reflected by the light source from re-entering the interferometer and/or a half beam block 45b may be disposed in the optical path on the opposite side of the interferometer than the light source.