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公开(公告)号：US11255776B2
公开(公告)日：2022-02-22
申请号：US15987779
申请日：2018-05-23
发明人： Azer P. Yalin
IPC分类号： G01N21/3504 , G01J3/42 , G01J3/28 , G01N21/39
摘要： Systems and methods are disclosed to determine the concentration of a species within a sample. An example method may include collecting optical loss data over a range of frequencies from the sample using a spectroscopy system; placing the optical loss data into a plurality of bins, each bin having a defined frequency width; determining an average optical loss data value for the optical loss values within each bin that have an optical loss value less than a threshold value; removing the optical loss data within each bin having a value outside a tolerance range bounding the average optical loss data value for the respective bin; fitting a spectral curve to the remaining optical loss data; and determining the concentration of the species within the sample based on the spectral curve.
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公开(公告)号：US11243346B2
公开(公告)日：2022-02-08
申请号：US17019228
申请日：2020-09-12
申请人： Eric Swanson
发明人： Eric Swanson
IPC分类号： G01N21/17 , G02B6/02 , G02B6/293 , A61B5/00 , G01B9/02 , G01N21/39 , G01N21/47 , H04B10/61 , G01S7/481 , G01S17/89 , G02F1/29
摘要： An optical-fiber measurement system includes an optical transceiver comprising an optical transmitter and an optical receiver. A multi-core optical fiber has a proximal end with a first optical core coupled to the transceiver and a second optical core coupled to the transceiver, and a distal end with the first optical core coupled to a sample path that is configured to convey light collected from a sample positioned external to the multi-core optical fiber and the second optical core coupled to a reference path such that the sample path and the reference path experience mostly a same disturbance along the multi-core optical fiber. The optical receiver is configured to interferometrically detect light from the sample path and light from the reference path.
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公开(公告)号：US20220034858A1
公开(公告)日：2022-02-03
申请号：US17280210
申请日：2019-09-24
摘要： A method of selectively catalytically oxidizing dinitrogen oxide present in a gaseous sample, comprising: heating a NiO catalyst to a temperature of at least 250° C.; and bringing the gaseous sample into contact with the heated NiO catalyst to oxidize dinitrogen oxide of the gaseous sample in the presence of the heated NiO catalyst.
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公开(公告)号：US20220003733A1
公开(公告)日：2022-01-06
申请号：US17396270
申请日：2021-08-06
摘要： A method of measuring a concentration of NO2 in a gaseous mixture using a multimode laser beam that covers a tunable spectral range with a width of no more than 5 nm, wherein the multimode laser beam provides a high resolution transmittance spectrum at an absorption cross section of NO2 molecules, and a system for measuring the concentration of NO2 in the gaseous mixture. Various combinations of embodiments of the system and the method are provided.
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公开(公告)号：US11215555B2
公开(公告)日：2022-01-04
申请号：US16727093
申请日：2019-12-26
申请人： Shenzhen Institute of Terahertz Technology and Innovation Co., Ltd. , Shenzhen Institute of Terahertz Technology and Innovation
发明人： Cui Guo , Yi Pan , Zhanqiang Xue
IPC分类号： G01N21/3586 , G01N21/39
摘要： A terahertz spectrum test device and system includes a femtosecond fiber laser configured to generate a pump light and a probe light. The pump light excites a terahertz transmitter to generate terahertz waves which are transmitted to a sample suspension device to irradiate a suspended to-be-tested sample, and the probe light is directly transmitted to a terahertz detector. The terahertz detector receives the terahertz waves transmitted from the sample suspension device, and then transmits the terahertz waves and the probe light together to a signal processing circuit to obtain a corresponding terahertz time-domain spectrum. By adoption of the terahertz spectrum test device and system, the to-be-tested sample need not be fixed with a clamp or other instruments, so that terahertz waves will not irradiate to the instrument used for fixing the to-be-tested sample during a terahertz spectrum test, which may otherwise affect the test result.
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公开(公告)号：US11209407B2
公开(公告)日：2021-12-28
申请号：US17096181
申请日：2020-11-12
发明人： Hanwei Mei , Qiaojun Lou , Ming Yan , Fangjun Feng , Huan Gao
摘要： Provided is a system for detection and analysis of a fibrous root system architecture of a plant, including a plant pot having at least one slit area extending through a cross section in an axial direction, at least one laser measuring unit, and a data analyzing unit, where each laser measuring unit has a laser transmitter and a receiver disposed corresponding to the slit area in such a manner that a laser beam emitted from the laser transmitter to the receiver goes across the cross section of the plant pot; measurement on all roots in the slit area is realized by a rotating stage, and the laser measuring unit swinging horizontally around the laser transmitter within a predetermined angle range; and the data analyzing unit is configured to perform statistical analysis on the roots of a plant to be measured according to laser measuring results.
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公开(公告)号：US11209356B2
公开(公告)日：2021-12-28
申请号：US16656045
申请日：2019-10-17
申请人： SHIMADZU CORPORATION
发明人： Kazune Mano
IPC分类号： G01N21/39 , G01N21/3504 , G01J3/433
摘要： A gas absorption spectrometer is provided that is capable of measuring a gas concentration and the like with high accuracy even when a measurement target gas is mixed with a gas other than the measurement target gas. A gas absorption spectrometer includes: a wavelength tunable light source; a light source control unit to change a wavelength of the light source; a gas cell to have a measurement object gas introduced thereto, the measurement object gas containing a measurement target gas and a mixed gas other than the measurement target gas; a photodetector to detect intensity of light having passed through the gas cell; a spectrum preparation unit to prepare an absorption spectrum of the measurement object gas from a change in the light intensity relative to the change in the wavelength; a physical quantity measurement unit to measure at least one of a temperature and a concentration of the measurement target gas based on an absorption spectrum of the measurement target gas; a gas concentration measurement unit to measure a concentration of the mixed gas; and a physical quantity correction unit to correct at least one of the temperature and the concentration of the measurement target gas measured by the physical quantity measurement unit based on the concentration of the mixed gas.
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公开(公告)号：US20210396755A1
公开(公告)日：2021-12-23
申请号：US17220888
申请日：2021-04-01
申请人： Genalyte, Inc.
IPC分类号： G01N33/569 , B01L3/00 , G01N21/39
摘要： Disclosed herein are methods of performing multiplexed serological immunoassays to detect multiple antigens in parallel to determine if a patient has an infection or an immune disorder. Use of multiple antigens in parallel increases specificity and/or sensitivity towards assaying the infection or immune disorder. The infection may be a viral infection such as a SARS-CoV-2 viral infection, a variant of a SARS-CoV-2 viral infection, or a non-SARS-CoV-2 coronavirus infection. Also disclosed herein are methods of performing the multiplexed serological immunoassays on an optical ring resonator substrate. Also disclosed herein are methods of detecting antibodies specific for an antigen that belong to more than one immunoglobulin type.
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公开(公告)号：US20210372980A1
公开(公告)日：2021-12-02
申请号：US17396318
申请日：2021-08-06
摘要： A method of measuring a concentration of NO2 in a gaseous mixture using a multimode laser beam that covers a tunable spectral range with a width of no more than 5 nm, wherein the multimode laser beam provides a high resolution transmittance spectrum at an absorption cross section of NO2 molecules, and a system for measuring the concentration of NO2 in the gaseous mixture. Various combinations of embodiments of the system and the method are provided.
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公开(公告)号：US20210351567A1
公开(公告)日：2021-11-11
申请号：US17370668
申请日：2021-07-08
IPC分类号： H01S5/0687 , G01N21/39 , H01S5/14
摘要： Methods for wavelength determination of widely tunable lasers and systems thereof may be implemented with solid-state laser based photonic systems based on photonic integrated circuit technology as well as discrete table top systems such as widely-tunable external cavity lasers and systems. The methods allow integrated wavelength control enabling immediate system wavelength calibration without the need for external wavelength monitoring instruments. Wavelength determination is achieved using a monolithic solid-state based optical cavity with a well-defined transmission or reflection function acting as a wavelength etalon. The solid-state etalon may be used with a wavelength shift tracking component, e.g., a non-balanced interferometer, to calibrate the entire laser emission tuning curve within one wavelength sweep. The method is particularly useful for integrated photonic systems based on Vernier-filter mechanism where the starting wavelength is not known a-priori, or for compact widely tunable external cavity lasers eliminating the need for calibration of wavelength via external instruments.
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