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公开(公告)号：US10900838B1
公开(公告)日：2021-01-26
申请号：US16578135
申请日：2019-09-20
Applicant: Honeywell International Inc.
Inventor： Hugh Podmore , Alan Scott
Abstract: This disclosure is related to devices, systems, and techniques for precisely measuring a wavelength of an optical signal. For example, a wavemeter system includes processing circuitry, a detector array, a set of optical chips, and a coarse wavelength unit configured to generate a coarse wavelength measurement of the input optical signal. The processing circuitry is configured to select an optical chip from a plurality of optical chips. The detector array is configured to generate a partial interferogram based on the at least the portion of the input optical signal. The processing circuitry is further configured to calculate an optical spectrum of the input optical signal based on the partial interferogram corresponding to the at least the portion of the input optical signal and the calibration matrix and identify, based on the optical spectrum of the input optical signal, the precise wavelength of the input optical signal.
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公开(公告)号：US20200319032A1
公开(公告)日：2020-10-08
申请号：US16304135
申请日：2017-06-06
Applicant: Shenzhen University
Inventor： Shixiang XU , Shuiqin ZHENG , Yi CAI , Qinggang LIN , Huangcheng SHANGGUAN , Junmin LIU
Abstract: The present application provides a spectral phase interference device and system for addressing the problem of low stability and compactness with prior art spectral phase interference devices. In the device or system provided in the present application, the optical element for generating the pulse pair to be measured consists of only a birefringent crystal and the adjustment of two-step phase shift is also completed by only a broadband quarter-wave plate. Therefore, wide application of optical elements such as pulse stretchers, retarders, optical splitters and mirrors as in prior art devices is avoided, thereby significantly simplifying the overall device's structure and resulting in enhanced stability and compactness at the same time.
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公开(公告)号：US10677790B2
公开(公告)日：2020-06-09
申请号：US15214828
申请日：2016-07-20
Applicant: City University of Hong Kong
Inventor： Siu Pang Ng , Chi-man Lawrence Wu , Guang-yu Qiu , Hui Lun Anton Law
IPC: G01N21/552 , B01L3/00 , G01N33/543 , G01J3/45 , G01N33/84
Abstract: An optochemical detector and a method for fabricating an optochemical detector includes a light generation unit arranged to emit a light signal; a probe cell unit arranged to alter at least one physical characteristic of the light signal in response to an interaction with a target substance; and a light detection unit arranged to receive the light signal altered by the probe cell unit; wherein a detection of the target substance is characterized by a change in the at least one physical characteristic altered by the probe cell unit.
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公开(公告)号：US20200173855A1
公开(公告)日：2020-06-04
申请号：US16699571
申请日：2019-11-30
Applicant: Munro Design & Technologies, LLC
Inventor： James F. Munro
Abstract: An interferometer system includes a measurement arm comprising a measurement dispersive optical system, a reference arm comprising a bulk diffuser object and a reference dispersive optical system, and an output system. The measurement dispersive optical system is positioned to direct measurement chromatic light towards a target, receive diverging chromatic measurement light from the target, and direct detected measurement light from the received diverging chromatic measurement light towards the output system. The reference dispersive optical system is positioned to direct reference chromatic light towards the bulk diffuser object, receive diverging chromatic reference light from the bulk diffuser object, and direct detected reference light from the received diverging chromatic reference light towards the output system. The output system is configured to determine at least one measured property of the target from the detected measurement light and the detected reference light.
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公开(公告)号：US10663346B2
公开(公告)日：2020-05-26
申请号：US15858338
申请日：2017-12-29
Applicant: Palo Alto Research Center Incorporated
Inventor： Alex Hegyi
Abstract: A reconstruction matrix used for calculating a hyperspectral data-cube includes rows of periodic functions. Each row of the reconstruction matrix corresponds to a selected wavelength and each column corresponds to a selected retardance of an interferometer. The periodic functions have as a parameter the selected wavelength of the corresponding row and are sampled at the selected retardances of each of the corresponding columns. An interferogram data-cube is obtained and includes an array of one or more simultaneously measured interferograms. Each row of the interferogram data-cube corresponds to one of the selected retardances and each column corresponds to a different interferogram from the simultaneously measured interferograms. A set of matrix-vector products for each of the interferograms is formed by multiplying the reconstruction matrix with a column of the interferogram data-cube to form the hyperspectral data-cube.
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Patent Agency Ranking
公开(公告)号：US20200080891A1
公开(公告)日：2020-03-12
申请号：US16123859
申请日：2018-09-06
Applicant: International Business Machines Corporation
Inventor： William GREEN , Eric ZHANG
Abstract: A method for assessing spectroscopic sensor accuracy, includes building an a priori simulation of generalized etalon drift. A spectroscopic sensor is tested to determine use parameters. A specific drift model is generated by applying the determined use parameters to the built a priori simulation of generalized etalon drift. The specific drift model is analyzed to determine whether the spectroscopic sensor is satisfactory.
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公开(公告)号：US10578488B1
公开(公告)日：2020-03-03
申请号：US16151999
申请日：2018-10-04
Applicant: THE AEROSPACE CORPORATION
Inventor： David Wheeler Warren , John A. Hackwell
Abstract: Disclosed herein are spectral imaging systems having an internally folded prism, which can have four different refracting surfaces. A first angle defines the spatial relationship between the first and second refracting surfaces. The first angle can have a range between 45-95 degrees. In some embodiments, the first angle can be 70 degrees. The spatial relationship of the third and fourth refracting surfaces can be defined by a second angle, which can be the same as the first angle. Finally, the spatial relationship of the second and third refracting surfaces can be defined by a third angle, which can have a range between 90-145 degrees. The prism index of refraction, the first, second, and third angles are selected such that TIR is achieved at two of the refracting surfaces. Additionally, these prism parameters are selected such that a 180 degrees fold of the optical path is achieved entirely within the prism.
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公开(公告)号：US20200056941A1
公开(公告)日：2020-02-20
申请号：US16345769
申请日：2018-02-12
Applicant: FU JIAN JIA PU XIN KE TECHNOLOGY CO., LTD.
Inventor： Shuping CHEN
Abstract: A superimpose Fourier Transform method applied to spectroscopy and imaging is provided in this invention. Raw signals are acquired by various spectrometric detectors. The acquired data are processed by Fourier Transform with a superimposed function to superimpose the transformed peak shapes. Then the superimposed signals are used to construct final spectral/imaging results. The superimpose Fourier Transform method in this invention applied to spectroscopy and imaging can narrow Fourier transformed peak width by half and bring about double of peak intensity. It is equivalent to produce the same effects by doubling optical path length of an interferometer or increasing doubly strength of a static magnet; alternatively, reduce half of sampling time for the same resolution on a same instrument.
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公开(公告)号：US10564504B2
公开(公告)日：2020-02-18
申请号：US15827204
申请日：2017-11-30
Applicant: Palo Alto Research Center Incorporated
Inventor： Alex Hegyi
IPC: G02F1/13 , G02F1/139 , G02F1/1335 , G01J4/04 , G02B5/30 , G01J3/447 , G01J3/28 , G01J3/45 , G01J3/453 , G02F1/133 , G02B27/28
Abstract: A liquid-crystal variable retarder has first and second liquid-crystal cells with respective first and second thicknesses, the second thickness being less than the first thickness. A feedback sensor provides a feedback signal indicative of a retardance of the liquid-crystal variable retarder. A controller is coupled to the feedback sensor and the first and second liquid-crystal cells. The controller is operable to apply a first signal to the first liquid-crystal cell based on a target retardance trajectory and a feedforward control model. The controller applies a second signal to the second liquid-crystal cell based on the feedback signal and the target retardance trajectory.
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公开(公告)号：US20200049974A1
公开(公告)日：2020-02-13
申请号：US16492672
申请日：2018-03-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuya SUGIMOTO , Kyosuke KOTANI , Tomofumi SUZUKI , Katsumi SHIBAYAMA , Noburo HOSOKAWA , Nao INOUE , Masashi ITO , Yutaka KURAMOTO
Abstract: A light module includes an optical element and a base on which the optical element is mounted. The optical element has an optical portion which has an optical surface; an elastic portion which is provided around the optical portion such that an annular region is formed; and a pair of support portions which is provided such that the optical portion is sandwiched in a first direction along the optical surface and in which an elastic force is applied and a distance therebetween is able to be changed in accordance with elastic deformation of the elastic portion. The base has a main surface, and a mounting region in which an opening communicating with the main surface is provided. The support portions are inserted into the opening in a state where an elastic force of the elastic portion is applied.
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