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公开(公告)号：US10545049B2
公开(公告)日：2020-01-28
申请号：US15321757
申请日：2015-06-17
Applicant: Spectral Engines Oy
Inventor： Jarkko Antila
Abstract: A method for determining spectral calibration data (λcal(Sd), Sd,cal(λ)) of a Fabry-Perot interferometer (100) comprises: forming a spectral notch (NC2) by filtering input light (LB1) with a notch filter (60) such that the spectral notch (NC2) corresponds to a transmittance notch (NC1) of the notch filter (60), measuring a spectral intensity distribution (M(Sd)) of the spectral notch (NC2) by varying the mirror gap (dFP) of the Fabry-Perot interferometer (100), and by providing a control signal (Sd) indicative of the mirror gap (dFP), and determining the spectral calibration data (λcal(Sd), Sd,cal(λ)) by matching the measured spectral intensity distribution (M(Sd)) with the spectral transmittance (TN(λ)) of the notch filter (60).
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公开(公告)号：US10545016B2
公开(公告)日：2020-01-28
申请号：US16322592
申请日：2017-08-07
Inventor： Takeshi Akagawa , Masahiro Kubo , Katsumi Abe , Kimiyasu Takoh , Ersin Altintas , Yuji Ohno , Tetsuri Ariyama , Ichiro Ishimaru
Abstract: A light measurement device that maintains high measurement precision. The light measurement device includes: light source that irradiates light upon measurement object; branch part that splits transmitted light or reflected light from measurement object; phase-changing unit that changes the phase of one beam of the branched light beams; phase-fixing unit that maintains the phase of the other beam of the branched light beams; adjustment mechanism, which is provided in phase-changing unit or phase-fixing unit, for adjusting the propagation direction of light; multiplexer that causes the light emitted by each of phase-changing unit and phase-fixing unit to interfere with each other; detection unit that detects light that is interfered with by multiplexer; and control unit that controls the adjustment mechanism on the basis of the luminance values of an interference image that is detected by detection unit and adjusts the propagation direction of light in phase-changing unit or phase-fixing unit.
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公开(公告)号：US20200025611A1
公开(公告)日：2020-01-23
申请号：US16037855
申请日：2018-07-17
Inventor： Jiangquan Mai , Wai Yi Yeung , Siddharth Arunkumar Agrawal , Chun Zhang
Abstract: Systems and methods which provide a compact spectrometer using static Fourier transform interferometer (SFTI) cube configurations, such as are suitable for use with respect to mobile and portable electronic devices, are described. A SFTI cube of embodiments comprises a monolithic dual mirrored wedge beam splitter structure wherein mirrored wedge surfaces provide two reflective mirrors that are slightly tilted away from the orthogonal directions so that the resultant beams of light cross over one another and form an interference pattern. SFTI cube implementations of embodiments facilitate highly compact spectrometer configurations having a wide wavelength range, high resolution, high throughput, and low cost.
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公开(公告)号：US10481003B2
公开(公告)日：2019-11-19
申请号：US16294294
申请日：2019-03-06
Applicant: SHIMADZU CORPORATION
Inventor： Kazumi Yokota
Abstract: In a two-beam interferometer, the moving speed of a movable mirror for producing interference light to generate a spectrum is changed at each completion of an operation cycle during which a reciprocal motion or one-way motion of the movable mirror is performed one or more times. Intensity signals of the interference light are obtained by a plurality of detection operations, where each detecting operation includes a series of detecting operations corresponding to the reciprocal motion or one-way motion of the movable mirror performed one or more times. A piece of information which changes depending on the moving speed of the movable mirror is extracted from the intensity signals obtained by the detection operations. This speed-dependent information corresponds to periodic noise superposed on the intensity signals. Accordingly, a false peak which would otherwise appear on the spectrum due to the periodic noise can be eliminated by removing the speed-dependent information.
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公开(公告)号：US10473526B2
公开(公告)日：2019-11-12
申请号：US15526816
申请日：2015-11-13
Inventor： Huibert Visser , Hedser van Brug
Abstract: The invention pertains to a method of spatially resolved detection of a gas substance in an area, comprising: imaging the area on a first image sensor, in a wavelength spectrum including an absorption wavelength peak corresponding to said gas substance; imaging the area on a second image sensor, to provide for each pixel of the first image a corresponding pixel of the second image for respective on- and off-peak wavelengths relative to the absorption wavelength; and providing a difference image as a function of the two pixel values of first and second image sensors to produce an image of the spatially resolved absorption wavelength corresponding to said gas substance.
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Patent Agency Ranking
公开(公告)号：US10466103B2
公开(公告)日：2019-11-05
申请号：US16106712
申请日：2018-08-21
Applicant: Seiko Epson Corporation
Inventor： Hideaki Kasahara , Masashi Kanai
Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
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公开(公告)号：US20190302016A1
公开(公告)日：2019-10-03
申请号：US16380616
申请日：2019-04-10
Applicant: Access Medical Systems, Ltd.
Inventor： Hong TAN
Abstract: The present invention is directed to an assembly for use in detecting an analyte in a sample based on thin-film spectral interference. The assembly includes a light source to emit light signals; a light detector to detect light signals; a coupler to optically couple the light source and the light detector to a waveguide tip; a monolithic substrate having a coupling side and a sensing side; and a lens between the waveguide tip and the monolithic substrate. The lens relays optical signals between the waveguide tip and the monolithic substrate.
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公开(公告)号：US10379042B2
公开(公告)日：2019-08-13
申请号：US16068630
申请日：2016-12-28
Applicant: The University of Tokyo
Inventor： Takuro Ideguchi , Kazuki Hashimoto , Megumi Takahashi , Yusuke Sakaki , Keisuke Goda
IPC: G01N21/65 , G01N21/3586 , G01J3/45 , G02B5/18 , G02B26/10 , G02B26/12 , G01B11/24 , G01N21/3563 , G01N21/47 , G02B27/42 , G01J3/44
Abstract: Provided is a Fourier transform-type spectroscopic device capable of improving an acquisition speed of a molecular vibration spectrum. The Fourier transform-type spectroscopic device (1) of the present invention rotates a scanning mirror (26b) by rotation of a rotating shaft (26a) to change a light path length of scanning light and delay or advance the scanning light with respect to reference light in accordance with a rotation angle of the scanning mirror (26b) from an initial position, and is thus capable of moving the scanning mirror (26b) at a high speed as compared with a case where a movable mirror is mechanically moved as in a conventional Fourier transform-type spectroscopic device, thereby improving an acquisition speed of a molecular vibration spectrum.
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公开(公告)号：US10345235B2
公开(公告)日：2019-07-09
申请号：US13809569
申请日：2011-08-19
Applicant: Charles Charbel Harb , Thomas Gary Spence , Toby Kristian Boyson
Inventor： Charles Charbel Harb , Thomas Gary Spence , Toby Kristian Boyson
IPC: H03F1/26 , G01N21/59 , G01J3/42 , G01J3/45 , G01N21/31 , G06F17/00 , G01J3/433 , G01N21/39 , G01N21/35
Abstract: Systems and methods for analysing a time-domain signal are described. The method comprising: in a mixer (150), mixing the time-decay signal (115) with a local oscillator signal (122) generated by a local oscillator (120), resulting in a mixed signal from which a Fourier transformed time-decay signal is generated comprising a fundamental transformed time decay signal at the fundamental frequency of the local oscillator signal (122) and a plurality of transformed time-decay signals at a plurality of frequencies; and determining the magnitude of each of the transformed time-decay signals at the fundamental frequency and at a frequency other than the fundamental frequency.
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公开(公告)号：US20190196294A1
公开(公告)日：2019-06-27
申请号：US15855242
申请日：2017-12-27
Applicant: Elenion Technologies, LLC
Inventor： Yang Liu , Yangjin Ma , Ran Ding , Thomas Wetteland Baehr-Jones , Saeed Fathololoumi , Kishore Padmaraju
Abstract: Conventionally, wavelength locking and monitoring has been achieved used various components, including calibrated etalon filters, gratings, and arrays of color filters, which offer fairly bulky solutions that require complicated controls. An improved on-chip wavelength monitor comprises: a combination comb filter comprising a plurality of comb filters, each for receiving a test beams, and each comb filter including a substantially different FSR, e.g. 10× to 20× the next closest FSR. A controller dithers a phase tuning section of each comb filter to generate a maximum or minimum output in a corresponding photodetector indicative of the wavelength of the test signal.
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