公开(公告)号：US09952098B2

公开(公告)日：2018-04-24

申请号：US15385778

申请日：2016-12-20

Applicant: VERIFOOD, LTD.

Inventor： Damian Goldring ,  Dror Sharon ,  Guy Brodetzki ,  Amit Ruf ,  Menahem Kaplan ,  Sagee Rosen ,  Omer Keilaf ,  Uri Kinrot ,  Kai Engelhardt ,  Ittai Nir

IPC: G01J3/28 ,  G01J3/10 ,  G01J3/02 ,  G01N21/25 ,  G01J3/12 ,  G01J3/26 ,  G01J3/45 ,  G01J3/36 ,  G01J5/02 ,  G01J5/10 ,  G01N33/02

CPC classification number: G01J3/108 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/0229 ,  G01J3/0256 ,  G01J3/0259 ,  G01J3/0262 ,  G01J3/0264 ,  G01J3/0272 ,  G01J3/0291 ,  G01J3/10 ,  G01J3/12 ,  G01J3/26 ,  G01J3/28 ,  G01J3/2803 ,  G01J3/36 ,  G01J3/45 ,  G01J5/0265 ,  G01J5/10 ,  G01J2003/1226 ,  G01J2003/123 ,  G01J2003/1239 ,  G01N21/255 ,  G01N33/02

Abstract: A spectrometer comprises a plurality of isolated optical channels comprising a plurality of isolated optical paths. The isolated optical paths decrease cross-talk among the optical paths and allow the spectrometer to have a decreased length with increased resolution. In many embodiments, the isolated optical paths comprise isolated parallel optical paths that allow the length of the device to be decreased substantially. In many embodiments, each isolated optical path extends from a filter of a filter array, through a lens of a lens array, through a channel of a support array, to a region of a sensor array. Each region of the sensor array comprises a plurality of sensor elements in which a location of the sensor element corresponds to the wavelength of light received based on an angle of light received at the location, the focal length of the lens and the central wavelength of the filter.

公开(公告)号：US09921102B2

公开(公告)日：2018-03-20

申请号：US15104905

申请日：2015-02-10

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu Zhang ,  Xiaobing Dai ,  Xiangyan Liu ,  Jindong Fei ,  Li Liu ,  Hongtao Yu ,  Shoukui Yao

IPC: G01J3/02 ,  H04N5/33 ,  G01J3/45 ,  G01H9/00 ,  G01J3/28 ,  H04N5/225 ,  H04N5/232

CPC classification number: G01J3/0202 ,  G01H9/004 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0218 ,  G01J3/0264 ,  G01J3/2823 ,  G01J3/45 ,  G01J2003/2836 ,  H04N5/2251 ,  H04N5/2252 ,  H04N5/2254 ,  H04N5/23241 ,  H04N5/33

Abstract: A moving platform borne infrared image-spectrum associated detection system includes an optical hood, a broadband optical system, a two-dimensional servo system, an infrared optical fiber, a Fourier interference spectrum module, an image-spectrum associated detection processing module, a power supply module, and a display module. Incident light enters from the optical hood to the broadband optical system, and is split by a spectroscope. Transmitted light is focused by a long-wave imaging lens group on an infrared detector for imaging. Reflected light is focused by a broadband spectrum lens group to an optical fiber coupler, enters the Fourier interference spectrum module through the infrared optical fiber to form an interference pattern, and undergoes Fourier transform to obtain spectral data.

公开(公告)号：US09915563B2

公开(公告)日：2018-03-13

申请号：US15046835

申请日：2016-02-18

Applicant: The United States of America, as represented by the Secretary of the Navy

Inventor： Michael K. Yetzbacher ,  Christopher W. Miller ,  Michael J. Deprenger ,  Andrew J. Boudreau

IPC: G01J3/26 ,  G01N21/45 ,  G01N21/41 ,  G01J3/02 ,  G01J3/45

CPC classification number: G01J3/26 ,  G01J3/021 ,  G01J3/45 ,  G01N21/41 ,  G01N21/45

Abstract: A method of optical spectroscopy and a device for use in optical spectroscopy. The device includes a substrate, and a plurality of etalon cavities affixed to or coupled to the substrate. A signal is received from a Fabry-Perot interferometer. The signal is sampled using the device according to a generalized Nyquist-Shannon sampling criterion. The signal is sampled using the device according to a phase differential criterion for wave number resolution. An input spectrum for the signal is reconstructed based on the signal sampled according to the generalized Nyquist-Shannon sampling criterion and the signal sampled according to the phase differential criterion for wave number resolution.

公开(公告)号：US20180052049A1

公开(公告)日：2018-02-22

申请号：US15556662

申请日：2016-03-08

Applicant: Teknologian tutkimuskeskus VTT Oy

Inventor： Aapo Varpula ,  Mika Prunnila ,  Kestutis Grigoras

IPC: G01J3/26 ,  G02B5/08 ,  G02B5/28 ,  G01J1/04 ,  G01J3/45 ,  G01B9/02 ,  H01L21/20 ,  H01L21/02

CPC classification number: G01J3/26 ,  B81B7/00 ,  G01B9/02 ,  G01B9/02018 ,  G01B2290/25 ,  G01J1/0414 ,  G01J3/0278 ,  G01J3/45 ,  G01J2003/2879 ,  G02B5/08 ,  G02B5/0816 ,  G02B5/28 ,  G02B26/0841 ,  H01L21/02019 ,  H01L21/2003

Abstract: A method for producing a mirror plate for a Fabry-Perot interferometer includes providing a substrate, which includes silicon, implementing a semi-transparent reflective coating on the substrate, forming a passivated region in and/or on the substrate by etching a plurality of voids in the substrate, and by passivating the surfaces of the voids, forming a first sensor electrode on top of the passivated region, and forming a second sensor electrode supported by the substrate.

公开(公告)号：US09863874B2

公开(公告)日：2018-01-09

申请号：US15274305

申请日：2016-09-23

Applicant: Drägerwerk AG & Co. KGaA

Inventor： Peter Dreyer ,  Livio Fornasiero ,  Arne Tröllsch ,  Robert Jahns

IPC: G01N21/3504 ,  G01J3/45 ,  G01J3/10 ,  G01J3/26 ,  G01J3/36 ,  G01J3/42

CPC classification number: G01N21/3504 ,  G01J3/108 ,  G01J3/26 ,  G01J3/36 ,  G01J3/42 ,  G01J3/45

Abstract: A method for signal detection with a gas analysis system (1, 1′) includes a radiation source (3); a gas measuring section (9) containing gas to be measured; a Fabry-Perot interferometer (13); a thermal sensor (17) configured to cause a change in voltage between electrodes with electromagnetic radiation falling thereon and arranged such that radiation released by a second interferometer mirror falls on the thermal sensor. The method includes irradiating the gas measuring section with radiation source radiation, continuously increasing or decreasing a distance of interferometer mirrors during a generating of time signal pulses at a constant period of time from one another. After a predefined number of time signal pulses, the voltage generated between the electrodes is detected and stored as a measured signal value. After a further predefined number of time signal pulses, the voltage generated between the electrodes is detected again and stored as a measured signal value.

公开(公告)号：US09846118B2

公开(公告)日：2017-12-19

申请号：US15097732

申请日：2016-04-13

Applicant: The Hong Kong Polytechnic University Shenzhen Research Institute

Inventor： Wei Jin ,  Yingchun Cao ,  Fan Yang ,  Hoi Lut Ho

IPC: G01B9/02 ,  G01N21/39 ,  G02F1/11 ,  G02B6/02 ,  G01J3/45

CPC classification number: G01N21/39 ,  G01J3/45 ,  G01N21/1717 ,  G01N2021/1731 ,  G01N2021/392 ,  G02B6/02328 ,  G02F1/11

Abstract: The present invention provides a gas measuring method based on photothermal effect in hollow-core optical fiber comprising: filling a target gas into the core of a hollow-core optical fiber; coupling a probe light and a periodically modulated pump light into the hollow-core optical fiber; absorbing the pump light by the target gas resulting in the periodic modulation of the phase of the probe light; demodulating the phase modulation information of the probe light to obtain the concentration of the target gas, wherein the pump laser is wavelength and/or amplitude modulated. In the present invention, two lasers including a pump laser and a probe laser are used for the measurement, this approach is simple and practical. Also, the use of the hollow-core optical fiber with extremely-small core area greatly increases the optical power density, thus enhances the strength of the detected photothermal signal; this method allows ppb level gas measurement with high selectivity, and is universally suitable for the detection of gases with absorption in near-infrared.

公开(公告)号：US09846079B2

公开(公告)日：2017-12-19

申请号：US15190727

申请日：2016-06-23

Applicant: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration

Inventor： Mark A. Stephen ,  Molly E. Fahey ,  Michael A. Krainak

IPC: G01B9/02 ,  G01J3/45 ,  G02B5/28 ,  G02B5/122 ,  G01J3/26

CPC classification number: G01J3/45 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/26 ,  G01J3/2803 ,  G02B5/122 ,  G02B5/284

Abstract: Systems, methods, and devices may provide an optical scheme that achieves simultaneous wavelength channels and maintains the resolution and luminosity of an etalon. Various embodiments may provide a method to optically recirculate the light reflected from the etalon back through the same etalon at new angles. Various embodiments create an etalon spectrometer based on angular dispersion without moving parts and without losing the light that is not initially transmitted. Various embodiments may provide a spectrally-resolved receiver and/or transmitter. Various embodiments may provide a system including a retro-reflector, a detector or transmitter array, and an etalon disposed between the retro-reflector and the detector or transmitter array, wherein the retro-reflector is configured to redirect light reflected by the etalon back to the etalon at a different angle of incidence than an original angle of incidence on the etalon of the light reflected by the etalon.

公开(公告)号：US09823125B2

公开(公告)日：2017-11-21

申请号：US14419818

申请日：2013-08-07

Applicant: FAZ TECHNOLOGY LIMITED

Inventor： Selwan Ibrahim ,  John O'Dowd ,  Martin Farnan ,  Roger Maher ,  Tom Farrell ,  John Dunne

IPC: G01J1/42 ,  G01J3/02 ,  H01S5/0687 ,  G01K11/32 ,  G01B11/16 ,  G01L1/24 ,  G01J3/18 ,  G01J3/45 ,  G01D5/353 ,  H01S5/00 ,  H01S5/06 ,  H01S5/12

CPC classification number: G01J3/027 ,  G01B11/18 ,  G01D5/35335 ,  G01J3/1895 ,  G01J3/45 ,  G01K11/3206 ,  G01L1/246 ,  H01S5/0014 ,  H01S5/0617 ,  H01S5/0687 ,  H01S5/1209

Abstract: The invention provides a dynamically swept tunable laser system and method for measuring sensor characteristics obtained from an array of optical sensors comprising means for dividing the total wavelength sweep of the laser into different regions in any particular order where each region contains single or multiple contiguous sweep segments and where each sweep segment is referenced by a start and a stop reference and can have different lengths compared to the other sweep segments. The sensor characteristics are determined from each region swept by the tunable laser. The invention provides for the tunable laser to be adapted to operate in a quasi-continuous mode to select segments in any order. The relative sweep rates of regions can be changed such that some regions can be swept more times than other regions.

公开(公告)号：US09810556B2

公开(公告)日：2017-11-07

申请号：US14677470

申请日：2015-04-02

Applicant: François Ouellette

Inventor： François Ouellette

IPC: G01D5/353 ,  G01J3/02 ,  G01J3/45 ,  G01J3/18

CPC classification number: G01D5/35354 ,  G01D5/35383 ,  G01J3/0218 ,  G01J3/1895 ,  G01J3/45

Abstract: There is described a sensor apparatus. It comprises an interrogator comprising a light source emitting pulses having a wavelength about an average wavelength; and a fiber Bragg grating (FBG) arrangement. The arrangement comprises a FBG sensor array comprising a plurality of FBG sensors on an optical fiber and being for reflecting the pulses, thereby producing reflected pulses at each one of the FBG sensors. FBG sensors of a given FBG sensor array have a spatial separation therebetween which is sufficient to allow, at a receiver, a temporal discrimination between the reflected pulses produced by each one of the FBG sensors. The FBG sensor array has a spectral reflection window which comprises the average wavelength.

公开(公告)号：US20170299508A1

公开(公告)日：2017-10-19

申请号：US15097732

申请日：2016-04-13

Applicant: The Hong Kong Polytechnic University Shenzhen Research Institute

Inventor： Wei JIN ,  Yingchun CAO ,  Fan YANG ,  Hoi Lut HO

IPC: G01N21/39 ,  G02B6/02 ,  G02F1/11 ,  G01J3/45

CPC classification number: G01N21/39 ,  G01J3/45 ,  G01N21/1717 ,  G01N2021/1731 ,  G01N2021/392 ,  G02B6/02328 ,  G02F1/11

Abstract: The present invention provides a gas measuring method based on photothermal effect in hollow-core optical fiber comprising: filling a target gas into the core of a hollow-core optical fiber; coupling a probe light and a periodically modulated pump light into the hollow-core optical fiber; absorbing the pump light by the target gas resulting in the periodic modulation of the phase of the probe light; demodulating the phase modulation information of the probe light to obtain the concentration of the target gas, wherein the pump laser is wavelength and/or amplitude modulated. In the present invention, two lasers including a pump laser and a probe laser are used for the measurement, this approach is simple and practical. Also, the use of the hollow-core optical fiber with extremely-small core area greatly increases the optical power density, thus enhances the strength of the detected photothermal signal; this method allows ppb level gas measurement with high selectivity, and is universally suitable for the detection of gases with absorption in near-infrared.