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公开(公告)号：US11879981B2
公开(公告)日：2024-01-23
申请号：US17951386
申请日：2022-09-23
Applicant: BlueHalo, LLC
Inventor： Levi Judah Smolin , Alexis H. Clark
CPC classification number: G01S17/95 , G01J9/04 , G01K3/14 , G01K13/00 , G01K15/005 , G01K15/007 , G01K3/06 , G01W2001/003
Abstract: The present disclosure is of an atmospheric characterization system that has a central processing board that has a first and a second communication interface. Further, the atmospheric characterization system further has a first precision temperature sensor that is communicatively coupled to the central processing board via the first communication interface and positioned a distance from a first side of the processing board, wherein the precision temperature measures a first temperature and transfers data indicative of the first temperature to the central processing board. In addition, the atmospheric characterization system has a second precision temperature sensor that is communicatively coupled to the central processing board via the second communication interface and positioned the distance from a second opposing side of the processing board such that the first precision temperature sensor and the second precision temperature sensor are equidistance from the processing board and a distance between the first precision sensor and the second precision sensor is a predetermined distance, r, and the second precision temperature sensor measures a second temperature and transfers data indicative of the second temperature to the central processing board simultaneously with the transferring of the first temperature. Additionally, the atmospheric characterization system has a processor that receives the first temperature and the second temperature and calculates a value indicative of atmospheric turbulence based upon the first temperature and the second temperature, wherein the value indicative of the atmospheric turbulence is used for designing, modifying, calibrating, or correcting an optical system.
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公开(公告)号：US11487015B2
公开(公告)日：2022-11-01
申请号：US15997304
申请日：2018-06-04
Applicant: BLUEHALO LLC
Inventor： Levi J. Smolin , Alexis H. Clark
Abstract: The present disclosure is of an atmospheric characterization system that has a central processing board that has a first and a second communication interface. Further, the atmospheric characterization system further has a first precision temperature sensor that is communicatively coupled to the central processing board via the first communication interface and positioned a distance from a first side of the processing board, wherein the precision temperature measures a first temperature and transfers data indicative of the first temperature to the central processing board. In addition, the atmospheric characterization system has a second precision temperature sensor that is communicatively coupled to the central processing board via the second communication interface and positioned the distance from a second opposing side of the processing board such that the first precision temperature sensor and the second precision temperature sensor are equidistance from the processing board and a distance between the first precision sensor and the second precision sensor is a predetermined distance, r, and the second precision temperature sensor measures a second temperature and transfers data indicative of the second temperature to the central processing board simultaneously with the transferring of the first temperature. Additionally, the atmospheric characterization system has a processor that receives the first temperature and the second temperature and calculates a value indicative of atmospheric turbulence based upon the first temperature and the second temperature, wherein the value indicative of the atmospheric turbulence is used for designing, modifying, calibrating, or correcting an optical system.
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公开(公告)号：US20220299374A1
公开(公告)日：2022-09-22
申请号：US16964095
申请日：2019-06-21
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Wei LIN , Chao MENG , Xiaoxiao WEN , Tian QIAO
Abstract: Disclosed are a method and a system for acquiring three-domain information of ultrafast light field. The method includes: acquiring time-domain information at positions of respective spatial points in a first signal to be measured; acquiring first frequency-domain information of continuous light portions at positions of respective spatial points in a second signal to be measured; acquiring second frequency-domain information of pulse light portions at positions of respective spatial points in a third signal to be measured; and fusing the time-domain information, the first frequency-domain information, and the second frequency-domain information, and determining three-domain information of an ultrafast light field signal according to information obtained by the fusion; wherein, the first signal to be measured, the second signal to be measured and the third signal to be measured are three signals obtained by splitting the ultrafast light field signal to be measured.
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公开(公告)号：US11215511B2
公开(公告)日：2022-01-04
申请号：US16763857
申请日：2018-11-20
Inventor： Rudolf Saathof
Abstract: A wavefront detector (100) and method for determining a signal wavefront (Ws) of a signal beam (Ls). A beam combiner (11) is configured to combine the signal beam (Ls) with a reference beam (Lr). An image detector (12) comprising an array of photosensitive pixels (12p) is configured to receive and measure an interference pattern (Wrs) of the combined signal and reference beams (Lr+Ls). A reference light source (14) is configured to generate the reference beam (Lr). A feedback controller (20) is configured to receive an interference signal (IB) based on measurement of at least part of the combined signal and reference beams (Lr+Ls), and control generation of the reference beam (Lr) by a feedback loop based on the interference signal (IB).
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公开(公告)号：US10274377B1
公开(公告)日：2019-04-30
申请号：US15782327
申请日：2017-10-12
Inventor： David J. Rabb , Jason W. Stafford
Abstract: A ladar device that has a linear frequency-modulated laser source that produces a primary beam. An optical shear generator spectrally shears the primary beam into no less than three sensing beams. An optical output delivers at least one of the sensing beams toward a target. The sensing beams reflect from the target to produce reflected beams. An optical receiver receives the reflected beams and produces reflected beam signals corresponding to characteristics of the reflected beams. A processor receives the reflected beam signals and produces a deviation matrix, without the use of a local oscillator. The deviation matrix is used to produce a reconstruction of the target, which is output on an electrical signal output.
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Patent Agency Ranking
公开(公告)号：US10161805B2
公开(公告)日：2018-12-25
申请号：US15943429
申请日：2018-04-02
Applicant: Mitutoyo Corporation
Inventor： Kazuhiko Kawasaki
Abstract: To measure the frequency of a laser, the frequency of a beat signal that is generated by the interference between an optical frequency comb, used as the reference of measurement, and the laser to be measured is measured. In such a laser frequency measurement using the optical frequency comb, at least one of a repetition frequency and a CEO frequency of the optical frequency comb is changed so that the frequency of the beat signal becomes a predetermined value, and the frequency of the beat signal is measured, so that the frequency of the laser is measured. This allows measurement of the frequency of laser having large frequency variation and low stability.
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公开(公告)号：US09952034B2
公开(公告)日：2018-04-24
申请号：US15609862
申请日：2017-05-31
Applicant: National Tsing Hua University
Inventor： Wei-Chung Wang , Po-Chi Sung
CPC classification number: G01B11/06 , G01B9/02019 , G01B2290/45 , G01J9/04
Abstract: An optical interferometric system for measurement of a full-field thickness of a plate-like object in real time includes two light sources, two screens, two image capturing devices, and an image processing module. The light sources radiate incident lights toward a reference point on the plate-like object in respective directions to produce respective interference fringe patterns (IFPs). The image capturing devices capture light intensity distribution images respectively of the IFPS imaged respectively on the screens. The image processing module calculates a fringe order at the reference point according to the light intensity distribution images, and obtains a full-field thickness distribution of the plate-like object according to the fringe order.
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公开(公告)号：US09806808B2
公开(公告)日：2017-10-31
申请号：US14927915
申请日：2015-10-30
Applicant: Ciena Corporation
Inventor： Vipul Bhatnagar , Michael Y. Frankel
IPC: G01J3/46 , H04B10/079 , G01J9/00 , G01J3/50 , G01J9/04
CPC classification number: H04B10/07957 , G01J3/46 , G01J3/50 , G01J9/00 , G01J9/04 , H04B10/61 , H04J14/02
Abstract: Systems and methods to detect a wavelength of interest (λRX) amongst one or more wavelengths (λ1, λ2, . . . , λN) include receiving the one or more wavelengths (λ1, λ2, . . . , λN); using a portion of a transmitted wavelength (λTX) as a Local Oscillator (LO) signal to perform performing coherent detection with the one or more wavelengths, wherein the transmitted wavelength (λTX) and the wavelength of interest (λRX) are a bi-directional communication link; and determining a presence of the wavelength of interest (λRX) based on the coherent detection.
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公开(公告)号：US09599454B2
公开(公告)日：2017-03-21
申请号：US14348495
申请日：2012-09-27
Applicant: TOKYO UNIVERSITY OF SCIENCE FOUNDATION
Inventor： Hiroharu Yui
CPC classification number: G01B9/02041 , G01J3/44 , G01J3/4535 , G01J9/04 , G01N21/65 , G01N2021/655
Abstract: An optical interferometer includes: a light source that emits a coherent first beam and a second beam that has a frequency difference corresponding to the natural frequency of a target molecule; amplitude modulating means that modulates the amplitude of the second beam; splitting means that splits the first beam into a reference beam and a first applied beam; optical path length adjusting means that adjusts the optical path length of the reference beam; and detecting means that detects an interference pattern between the reference beam and the first beam (a signal beam) that has experienced a stimulated Raman loss or gain in accordance with the amplitude modulation as a result of the frequency difference resonating with the target molecule when the first applied beam and a second applied beam (the amplitude modulated second beam) have been applied to a measurement position of an object.
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公开(公告)号：US09587927B2
公开(公告)日：2017-03-07
申请号：US14378880
申请日：2012-11-08
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiubin Tan , Pengcheng Hu , Xiaofei Diao
CPC classification number: G01B9/02007 , G01B9/02003 , G01B9/02027 , G01B9/02045 , G01B11/14 , G01B2290/70 , G01J9/04 , G02B27/283
Abstract: A high speed high resolution heterodyne interferometric method and system are provided. The invention uses two spatially separated beams with slightly different frequencies and has two measurement signals with opposite Doppler shift. The switching circuit selects one of the two measurement signals for displacement measurement according to the direction and speed of the target movement. In this invention, the measurement is insensitive to the thermal variation; the periodic nonlinearity is essentially eliminated by using two spatially separated beams; the measurable target speed of the interferometer is no longer limited by the beat frequency of the laser source.
Abstract translation: 提供了高速高分辨率外差干涉法和系统。 本发明使用具有稍微不同频率的两个空间分离的波束，并且具有相反多普勒频移的两个测量信号。 开关电路根据目标运动的方向和速度选择两个测量信号中的一个用于位移测量。 在本发明中，测量对热变化不敏感; 通过使用两个空间分离的光束基本上消除了周期性非线性; 干涉仪的可测量目标速度不再受激光源的拍频的限制。
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