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公开(公告)号：US11499867B2
公开(公告)日：2022-11-15
申请号：US17240172
申请日：2021-04-26
Applicant: The Trustees of Princeton University
Inventor： Lukasz Sterczewski , Jonas Westberg , Gerard Wysocki
Abstract: Disclosed herein is an all-digital phase and timing correction procedure for coherent averaging in dual-comb and multiheterodyne spectroscopy—applicable to any dual-comb spectroscopy setup. It can account for large frequency/phase instabilities of the used sources, yielding a significant reduction of the noise pedestal and an increase in signal-to-noise ratio (SNR) of the radio frequency (RF) beat notes. This technique is computationally efficient and can be conveniently implemented either as a post-processing algorithm or in a real-time data acquisition and processing platform without the necessity of adding any additional optical elements to the dual-comb spectroscopy system. By implementing this technique, the performance of any comb- or comb-like-source-based DCS system with a sufficient degree of mutual coherence between the optical modes can be improved in terms of SNR and number of spectroscopically-usable RF beat notes. The described technique is compatible with a DC-centered RF spectrum, where the negative frequencies are folded to the positive domain to double the number of beat notes within the detector bandwidth. The technique enables coherent averaging over extended time-scales even for free-running combs, thus increasing the sensitivity of absorption and dispersion DCS measurements.
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公开(公告)号：US20220102930A1
公开(公告)日：2022-03-31
申请号：US17546153
申请日：2021-12-09
Inventor： TASUKU NAKAMURA , YASUHISA INADA
Abstract: A dual optical frequency comb light-emitting device includes a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length, a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length, and an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator. The first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside. The second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside.
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公开(公告)号：US11131584B2
公开(公告)日：2021-09-28
申请号：US16831308
申请日：2020-03-26
Applicant: VIAVI Solutions Inc.
Inventor： Valton Smith , William D. Houck , Curtis R. Hruska , Marc K. Von Gunten
Abstract: A sensor device may determine a first optical sensor value associated with a first displacement and a second optical sensor value associated with a second displacement, wherein the first displacement is between an emitter associated with the first optical sensor value and a sensing location used to determine the first optical sensor value, wherein the second displacement is between an emitter associated with the second optical sensor value and a sensing location used to determine the second optical sensor value, and wherein the first displacement is different from the second displacement. The sensor device may determine one or more measurements using the first optical sensor value and the second optical sensor value, wherein the one or more measurements relate to a first penetration depth associated with the first optical sensor value, and a second penetration depth associated with the second optical sensor value.
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公开(公告)号：US11079598B2
公开(公告)日：2021-08-03
申请号：US16775123
申请日：2020-01-28
Applicant: Magic Leap, Inc.
Inventor： Nicole Elizabeth Samec , Nastasja U. Robaina , Adrian Kaehler , Mark Baerenrodt , Eric Baerenrodt , Christopher M. Harrises , Tammy Sherri Powers
IPC: G02B27/01 , G01J3/02 , G01J3/42 , A61B5/1455 , A61B5/11 , A61B5/00 , G06F3/03 , G01J3/10 , G06F3/01 , G01J3/28 , G01J3/427 , G01N21/359 , G01N33/483 , F21V8/00 , G02B27/00
Abstract: In some embodiments, a system comprises a head-mounted frame removably coupleable to the user's head; one or more light sources coupled to the head-mounted frame and configured to emit light with at least two different wavelengths toward a target object in an irradiation field of view of the light sources; one or more electromagnetic radiation detectors coupled to the head-mounted member and configured to receive light reflected after encountering the target object; and a controller operatively coupled to the one or more light sources and detectors and configured to determine and display an output indicating the identity or property of the target object as determined by the light properties measured by the detectors in relation to the light properties emitted by the light sources.
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公开(公告)号：US11002665B2
公开(公告)日：2021-05-11
申请号：US16465824
申请日：2017-11-29
Applicant: Photothermal Spectroscopy Corp.
Inventor： Craig Prater , Kevin Kjoller , Roshan Shetty
Abstract: System for performing chemical spectroscopy on samples from the scale of nanometers to millimeters or more with a multifunctional platform combining analytical and imaging techniques including dual beam photo-thermal spectroscopy with confocal microscopy, Raman spectroscopy, fluorescence detection, various vacuum analytical techniques and/or mass spectrometry. In embodiments described herein, the light beams of a dual-beam system are used for heating and sensing.
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Patent Agency Ranking
公开(公告)号：US20210041294A1
公开(公告)日：2021-02-11
申请号：US16986917
申请日：2020-08-06
Applicant: Endress+Hauser Conducta GmbH+Co. KG
Inventor： Frank Weber , Thilo KRÄTSCHMER , Felicia Seichter
Abstract: The invention relates to a method for compensation for different sensitivities at different wavelengths in a spectrometric measuring system, including steps of calibrating the measuring system in a wavelength range with respect to one or more known reference standards, creating a wavelength-dependent compensation algorithm for linearization, and adjusting the measuring system using the compensation algorithm. The invention further discloses a corresponding measuring system.
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公开(公告)号：US20210033460A1
公开(公告)日：2021-02-04
申请号：US16831308
申请日：2020-03-26
Applicant: VIAVI Solutions Inc.
Inventor： Valton SMITH , William D. HOUCK , Curtis R. HRUSKA , Marc K. VON GUNTEN
Abstract: A sensor device may determine a first optical sensor value associated with a first displacement and a second optical sensor value associated with a second displacement, wherein the first displacement is between an emitter associated with the first optical sensor value and a sensing location used to determine the first optical sensor value, wherein the second displacement is between an emitter associated with the second optical sensor value and a sensing location used to determine the second optical sensor value, and wherein the first displacement is different from the second displacement. The sensor device may determine one or more measurements using the first optical sensor value and the second optical sensor value, wherein the one or more measurements relate to a first penetration depth associated with the first optical sensor value, and a second penetration depth associated with the second optical sensor value.
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公开(公告)号：US10753864B2
公开(公告)日：2020-08-25
申请号：US16215269
申请日：2018-12-10
Applicant: General Electric Company
Inventor： Ansas Matthias Kasten , William Albert Challener
IPC: G01N21/3504 , G01J3/30 , G01J3/06 , G01J3/427 , G01N21/17
Abstract: A gas analysis system includes a spectroscopy assembly coupled to a vehicle. The spectroscopy assembly includes a multiplexer configured to combine a plurality of light beams into a multiplexed light beam, wherein the multiplexer is configured to direct the multiplexed light beam toward a target surface. Additionally, the spectroscopy assembly includes a collection optic configured to receive a reflected multiplexed light beam from the target surface. Further, the spectroscopy assembly includes a controller configured to de-multiplex the multiplexed light beam into a plurality of reflected light beams and determine a spectral intensity of the plurality of reflected light beams.
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149.发明授权公开(公告)号：US10466105B2
公开(公告)日：2019-11-05
申请号：US15986445
申请日：2018-05-22
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES , Office National d'Etudes et de Recherches Aérospatiales
Inventor： Philippe Hébert , François Lemaître , Xavier Orlik , Thibault Dartigalongue
Abstract: Disclosed is a remote spectroscopy device of the LIDAR type including a module for generating an emission signal, an emission module for sending the emission signal toward a targeted material, a receiving module for receiving a response signal and a module for postprocessing of the response signal to determine a composition of the targeted material. The generating module includes at least two laser sources, each laser source being able to generate a laser signal at a predetermined wavelength, an upstream mixer able to mix the laser signals generated by the different laser sources, and a first modulator able to modulate the composite signal at a first modulation frequency to form the emission signal.
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公开(公告)号：US20190212261A1
公开(公告)日：2019-07-11
申请号：US16352351
申请日：2019-03-13
Applicant: FLIR Systems AB
Inventor： Tomas Lannestedt , Ulf Wallgren , Jonas Sandsten
IPC: G01N21/3504 , G01J3/427
CPC classification number: G01N21/3504 , G01J3/427 , G01N2201/0221
Abstract: Systems and methods disclosed herein provide for detecting gas by: illuminating, with a controllable illuminator system, a scene with light including radiation within the infrared (IR) wavelength range; controlling the illuminator system to emit light at a first wavelength corresponding to a first absorption level of a gas and at a second wavelength corresponding to a second absorption level of a gas, such that an equal amount of radiant energy over a time period is emitted onto the scene for each of said first and second wavelengths; and capturing a first IR image of the scene being illuminated with light at said first wavelength and a second IR image of the scene illuminated with light at said second wavelength, and comparing said first and second IR images to determine whether a characteristic for at least one specific gas is represented in said first and/or second IR images.
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