公开(公告)号：US20200064188A1

公开(公告)日：2020-02-27

申请号：US16485870

申请日：2018-02-13

Applicant: UNIVERSITY OF THE WEST OF SCOTLAND

Inventor： EWAN WADDELL ,  DESMOND GIBSON

IPC: G01J3/10 ,  G01J3/12 ,  G01J3/02 ,  G01J3/42

Abstract: An optical sensor for multispectral analysis of a fluid sample comprises at least one light source, at least one interference filter, and a plurality of light detectors arranged such that light emitted by the at least one light source is incident on the at least one interference filter. There is a spatial variation in the intensity of light incident on the said at least one interference filter.

公开(公告)号：US20200049557A1

公开(公告)日：2020-02-13

申请号：US16536709

申请日：2019-08-09

Applicant: Industrial Cooperation Foundation Chonbuk National University

Inventor： Daesuk KIM

IPC: G01J3/08 ,  G01J3/02 ,  G01J3/453 ,  G01J3/447 ,  G01J3/12

Abstract: The present inventive concepts relate to an inspection apparatus that snapshots an interference image pattern having a high spatial carrier frequency produced from a one-piece off-axis polarimetric interferometer and that precisely and promptly measures a Stokes vector including spatial polarimetric information. The inspection apparatus dynamically measure in real-time a two-dimensional polarization information without employing a two-dimensional scanner.

公开(公告)号：US10517484B2

公开(公告)日：2019-12-31

申请号：US16506885

申请日：2019-07-09

Applicant: Omni Medsci, Inc.

Inventor： Mohammed N. Islam

IPC: G01J5/02 ,  A61B5/00 ,  G01N21/3563 ,  G01N33/02 ,  G01N33/15 ,  G01N33/44 ,  G01N33/49 ,  A61B5/145 ,  A61B5/1455 ,  G01J3/02 ,  G01J3/10 ,  G01J3/14 ,  G01J3/28 ,  G01J3/42 ,  G01J3/453 ,  G01N21/35 ,  G01N21/359 ,  G01N21/39 ,  G01N21/88 ,  G01N21/85 ,  H01S3/067 ,  G01N21/95 ,  H01S3/30 ,  G01J3/12 ,  G01M3/38 ,  G01J3/18 ,  H01S3/00

Abstract: A wearable device includes a measurement device to measure a physiological parameter adapted to be placed on a wrist or an ear of a user. A plurality of semiconductor light sources such as light emitting diodes generate corresponding output light having an initial light intensity. A receiver includes spatially separated detectors receiving reflected light from the output lights and coupled to analog to digital converters. The receiver is configured to synchronize to the semiconductor source(s). The measurement device improves signal-to-noise ratio of the output signal by increasing light intensity relative to the initial light intensity and by increasing a pulse rate. Further improvement in signal-to-noise ratio is achieved by using change detection, where the receiver compares the signals with light on and with light off.

公开(公告)号：US10481100B2

公开(公告)日：2019-11-19

申请号：US15951686

申请日：2018-04-12

Applicant: VIAVI Solutions Inc.

Inventor： Benjamin F. Catching ,  Marc K. Von Gunten ,  Curtis R. Hruska ,  Paula Smith ,  Paul G. Coombs

IPC: G01N21/85 ,  G01J3/02 ,  G01J3/12 ,  G01N21/27

Abstract: Increasing the precision of process monitoring may be improved if the sensors take the form of traveling probes riding along with the flowing materials in the manufacturing process rather than sample only when the process moves passed the sensors fixed location. The probe includes an outer housing hermetically sealed from the flowing materials, and a light source for transmitting light through a window in the housing onto the flowing materials. A spatially variable optical filter (SVF) captures light returning from the flowing materials, and separates the captured light into a spectrum of constituent wavelength signals for transmission to a detector array, which provides a power reading for each constituent wavelength signal.

公开(公告)号：US10444153B2

公开(公告)日：2019-10-15

申请号：US15885035

申请日：2018-01-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sang Kyu Kim

IPC: G01N21/65 ,  G01N21/66 ,  G01J3/44 ,  G01J3/10 ,  G01J3/42 ,  G01J3/02 ,  G01N21/359 ,  G01J3/12 ,  G01N21/47

Abstract: A spectrum measurement apparatus includes: a plurality of light sources configured to emit light having different wavelengths to an object; a light detector configured to receive light, which is reflected or scattered from or transmitted through the object, and to measure an intensity of the received light; and a processor configured to determine a strength of an electric signal to be applied to at least one of the plurality of light sources by using one of the plurality of light sources, and by applying the electric signal having the determined strength to the plurality of light sources to obtain a spectrum of the object.

公开(公告)号：US20190293486A1

公开(公告)日：2019-09-26

申请号：US16306659

申请日：2017-05-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John A. WHEATLEY ,  Gilles J. BENOIT ,  Guanglei DU ,  Rolf W. BIERNATH ,  Sara Suzanne MERRITT ,  James HILLIS ,  Owen M. ANDERSON ,  Timothy J. NEVITT

IPC: G01J1/04 ,  G01J1/20 ,  G01J3/12 ,  G01J3/46 ,  G01N21/31 ,  G02B5/136 ,  G01J3/28

Abstract: In an example, an example article may include a spatially variant microreplicated layer optically coupled to a wavelength selective filter. The wavelength selective filter may have a light incidence angle-dependent optical band. The spatially variant microreplicated layer may be configured to transmit light to a first optical region of the wavelength selective filter at a first predetermined incidence angle and to a second optical region of the wavelength selective filter at a second predetermined incidence angle.

公开(公告)号：US20190285473A1

公开(公告)日：2019-09-19

申请号：US16275747

申请日：2019-02-14

Applicant: Massachusetts Institute of Technology

Inventor： Juejun Hu ,  Tian Gu ,  Kazumi Wada ,  Anuradha Murthy Agarwal ,  Lionel Cooper Kimerling ,  Derek Kita ,  Junying Li ,  Fleur Jacolien Fok

IPC: G01J3/12 ,  G01J3/02 ,  G01J3/32 ,  G01J3/28

Abstract: An apparatus for generating a spectral image includes a filter to receive incident light. The filter has a variable refractive index. The apparatus also includes a modulator, operably coupled to the filter, to modulate the variable refractive index of the filter so as to generate a plurality of optical patterns from the incident light. The plurality of optical patterns represents the spectral image and each optical pattern in the plurality of optical patterns corresponds to a different modulation of the variable refractive index. The apparatus further includes a detector, in optical communication with the filter, to detect the plurality of optical patterns.

公开(公告)号：US10393933B2

公开(公告)日：2019-08-27

申请号：US15624117

申请日：2017-06-15

Applicant: National Technology & Engineering Solutions of Sandia, LLC

Inventor： Michael B. Sinclair ,  Salvatore Campione ,  David Bruce Burckel ,  Igal Brener ,  Paul J. Resnick

IPC: G02B5/28 ,  G02B5/20 ,  G02B1/00 ,  H01S5/10 ,  H01S5/12 ,  G01J3/12

Abstract: Tunable filters can use Fano metasurface designs having extremely narrow transmission bands. The Fano metasurface can comprise dielectric or semiconductor materials and can produce transmission bands with quality factors well in excess of 1000—at least a factor of 50 greater than typical metamaterial-based infrared resonances. Numerical simulations of these metasurfaces show that the spectral position of the passband can be changed by slightly changing the position of a small dielectric perturbation block placed within the near-field of the resonator by using simple electromechanical actuation architectures that allow for such motion. An array of independently tunable narrowband infrared filters can thereby be fabricated that only requires deep-subwavelength motions of perturbing objects in the resonator's near-field.

公开(公告)号：US20190242748A1

公开(公告)日：2019-08-08

申请号：US15960828

申请日：2018-04-24

Applicant: NATIONAL CHIAO TUNG UNIVERSITY

Inventor： Cheng-Sheng HUANG ,  Chih-Wei CHANG ,  Shi-Ting CHEN

IPC: G01J3/12 ,  G01J3/02 ,  G01J3/28 ,  G01N21/77

Abstract: Disclosed is a resonant wavelength measurement apparatus, including a light source and a measurement unit. The measurement unit has a guided-mode resonance filter and a photosensitive element. The guided-mode resonance filter has a plurality of resonant areas, and each resonant area has a different filtering characteristic, to receive first light in the light source transmitted by a sensor or receive second light in the light source reflected by the sensor. The first light has a first corresponding pixel on the photosensitive element, the second light has a second corresponding pixel on the photosensitive element, and the first corresponding pixel and the second corresponding pixel correspond to a same resonant wavelength.

公开(公告)号：US20190204609A1

公开(公告)日：2019-07-04

申请号：US16295284

申请日：2019-03-07

Applicant: Verily Life Sciences LLC

Inventor： Supriyo Sinha ,  Cheng-Hsu Wu

IPC: G02B27/10 ,  G02B5/20 ,  G02B21/00 ,  G01J3/12 ,  G02B27/14 ,  G02B26/00 ,  G01J3/02 ,  G01N21/64 ,  G01N21/31 ,  G01J3/28

CPC classification number: G02B27/1006 ,  G01J3/02 ,  G01J3/12 ,  G01J3/2823 ,  G01J2003/1213 ,  G01N21/31 ,  G01N21/6456 ,  G01N21/6458 ,  G02B5/20 ,  G02B21/0064 ,  G02B26/007 ,  G02B27/10 ,  G02B27/102 ,  G02B27/141

Abstract: Systems and methods for filtering an optical beam are described. In one implementation, a system for filtering an input optical beam includes a first beamsplitter, a first spectral slicing module, a second spectral slicing module, and a second beamsplitter. The first beamsplitter is configured to split the input optical beam into a first optical beam and a second optical beam. The first spectral slicing module has a first passband and is configured to filter the first optical beam. The second spectral slicing module has a second passband and is configured to filter the second optical beam. The second beamsplitter is configured to combine the first optical beam and the second optical beam into an output optical beam. The first and second spectral slicing modules may each comprise a longpass filter and a shortpass filter aligned along its optical axis, and the longpass filter and/or the shortpass filter are rotatable relative to the optical axis. Advantageously, the optical system allows for tunable spectral filtering of the input optical beam suitable for 2-D imaging systems.