公开(公告)号：US10585037B2

公开(公告)日：2020-03-10

申请号：US15751353

申请日：2016-08-08

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Kazuhiro Yanagi ,  Keiji Hirata

IPC: G01N21/3504 ,  G01N21/27 ,  G01J3/06 ,  G01J3/02 ,  G01J3/10 ,  G01J3/42 ,  G01J3/433

Abstract: There is provided a substance detecting device emits first invisible light to the inside and the outside of a detection region of a substance, changes an emitting direction of the first invisible light inside and outside the detection region, receives third invisible light which is passing light of the first invisible light through the reference cell in which a detection target substance is stored, outside of the detection region, and adjusts a temperature of the first invisible light and controls the wavelength of the first invisible light based on the wavelength characteristics of the third invisible light.

公开(公告)号：US20190339198A1

公开(公告)日：2019-11-07

申请号：US16512320

申请日：2019-07-15

Applicant: ABB, INC.

Inventor： Daniele Angelosante ,  Andrew Fahrland ,  Deran Maas ,  Manish Gupta

IPC: G01N21/39 ,  G01J3/02 ,  G01J3/28 ,  G01J3/42 ,  G01J3/433

Abstract: A method of processing raw measurement data from a tunable diode laser absorption spectroscopy (TDLAS) tool or other spectroscopic instrument is provided that determines what types of noise (electronic or process flow) are present in the measurement. Based on that determination, the noise is reduced by performing a weighted averaging using weights selected according to the dominant type of noise present, or a general case is applied to determine weights where neither noise type is dominant. The method also involves performing continuous spectroscopy measurements with the tool, with the data and weighted averaging being constantly updated. Weighting coefficients may also be adjusted based on similarity or difference between time-adjacent traces.

公开(公告)号：US10451546B2

公开(公告)日：2019-10-22

申请号：US16117547

申请日：2018-08-30

Applicant: Pendar Technologies, LLC

Inventor： Daryoosh Vakhshoori ,  Romain Blanchard ,  Tobias Mansuripur

IPC: G01N21/45 ,  G01N21/3504 ,  G01J3/433

Abstract: We present here systems and methods for generating a heterodyne signal using the naturally occurring chirp of a pulsed single-mode laser. The electrical square-wave pulse used to drive the laser heats the laser cavity, causing the laser frequency to change or chirp during the emission of the optical pulse. This chirped optical pulse can be split into a chirped signal pulse that interacts with a sample and a chirped reference pulse that interferes with the chirped signal pulse on a detector to produce a heterodyne modulation whose instantaneous phase and amplitude depend on the sample's dispersion and absorption, respectively. The chirp is reproducible, so the heterodyne modulation, instantaneous phase, and/or instantaneous amplitude can be average over many measurements, either with multiple pulses from the same laser or multiple pulses from different lasers, each emitting at a different wavelength.

公开(公告)号：US10337920B2

公开(公告)日：2019-07-02

申请号：US15768548

申请日：2017-03-02

Applicant: CI SYSTEMS (ISRAEL) LTD.

Inventor： Dario Cabib

IPC: G01J3/02 ,  G01J3/26 ,  G01J3/42 ,  G01J3/45 ,  G01J3/427 ,  G01J3/433 ,  G01J3/453 ,  G02B27/50

Abstract: An interference fringe pattern generator forms an interference fringe pattern from the light rays diffused from a region of an object positioned against a background. A planar array of detector pixels is arranged to capture an image of the interference fringe pattern. A storage medium records information indicative of intensity values of the image of the interference fringe pattern captured by a selected group of pixels of the planar array of detector pixels. The information is recorded as a function of the optical path difference values traversed by the diffused light rays through the interference fringe pattern generator for each of the pixels in the selected group of pixels. A processor determines the spectral characteristics of the object based on the information indicative of the intensity values recorded by the storage medium and the optical path difference values traversed by the diffused light rays.

公开(公告)号：US10228284B2

公开(公告)日：2019-03-12

申请号：US15186682

申请日：2016-06-20

Applicant: Massachusetts Institute of Technology

Inventor： Thomas H. Jeys ,  William D. Herzog ,  Brian G. Saar ,  Alexander M. Stolyarov ,  Ryan Sullenberger ,  David Crompton ,  Shawn Michael Redmond

IPC: G01J5/02 ,  G01J3/433 ,  G01N21/17 ,  G01N21/63 ,  G01J3/10 ,  G01J3/28 ,  G01J3/447

Abstract: A device, and corresponding method, can include a pump light source configured to be modulated at a pump modulation and to irradiate a target specimen. The device can also include a probe light source arranged to generate a speckle pattern from the target specimen, as well as a sensor configured to detect changes in at least one of position and intensity of one or more speckle lobes of the speckle pattern having correlation with the pump modulation. The device and method can be used for non-contact monitoring and remote sensing of surfaces, gases, liquids, particles, and other target materials by analyzing speckle pattern changes as a function of pump light irradiation. Advantages can include much higher sensitivity than existing methods; the ability to use visible probe wavelengths for uncooled, low-cost visible detectors with high spatial resolution; and the ability to obtain target material properties without detecting infrared light.

公开(公告)号：US20180364101A1

公开(公告)日：2018-12-20

申请号：US16109382

申请日：2018-08-22

Applicant: Li-Cor, Inc.

Inventor： Serguei Koulikov

IPC: G01J3/433 ,  G01N21/39 ,  G01N21/3504 ,  G01J3/36

Abstract: Systems and methods for detecting trace gases utilize a resonance optical cavity and one, two or more coherent light sources coupled to the cavity through one or more cavity coupling mirrors, whereby two or more optical cavities may share the same gas volume.

公开(公告)号：US10132747B2

公开(公告)日：2018-11-20

申请号：US15537052

申请日：2015-12-02

Applicant: Siemens Aktiengesellschaft

Inventor： Franz Steinbacher

IPC: G01J5/02 ,  G01N21/3504 ,  G01N21/39 ,  G01J3/433 ,  G01J3/10

Abstract: An absorption spectrometer which measures a gas component concentration in a measured gas and which operates via wavelength modulation spectroscopy, wherein the light wavelength of a wavelength-tunable light source is periodically varied over a gas component absorption line of interest and simultaneously sinusoidally modulated with a high frequency and a low amplitude signal, and wherein the measurement signal of a detector is demodulated in a phase-sensitive manner at the frequency and/or a harmonic of the frequency and further analyzed, where modulation starts in each period or each n-th period with the frequency in a time interval before the beginning of the time function and is performed with a higher amplitude than during the time function to demodulate the measurement signal in a phase-synchronous manner, where a device provided for the phase-sensitive demodulation is synchronized during the time interval such that a cable for transmitting synchronization signals is no longer necessary.

公开(公告)号：US20180172511A1

公开(公告)日：2018-06-21

申请号：US15577416

申请日：2015-05-28

Applicant: EMPIRE TECHNOLOGY DEVELOPMENT LLC

Inventor： Mordehai MARGALIT ,  Curtis D. MOYER

IPC: G01J3/10 ,  G01J3/02 ,  G01J3/433 ,  G01N21/64

Abstract: Technologies are generally described for concurrent activation of multiple illumination sources to analyze a sample. A controller may be configured to activate the illumination sources substantially simultaneously, where a current or voltage of each activated illumination source is modulated at a different frequency by respective circuit drivers of the controller. Each activated illumination source may be configured to illuminate the sample with light at a different emission wavelength, and one or more detectors may be configured to detect a composite signal from the sample in response to the illumination. The composite signal may include multiple returned signals, where each returned signal corresponds to light emitted from one of the activated illumination sources at a respective emission wavelength. One or more filters, each associated with a respective modulation frequency of one activated illumination source, may be configured to extract each returned signal from the composite signal for analysis.

公开(公告)号：US20180149520A1

公开(公告)日：2018-05-31

申请号：US15823421

申请日：2017-11-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Naoki Kohara

IPC: G01J3/02 ,  H01S3/108 ,  G01J3/44 ,  H01S3/00 ,  G01J3/433 ,  G01N21/65 ,  H01S3/23

CPC classification number: G01J3/0297 ,  G01J3/0208 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/0262 ,  G01J3/433 ,  G01J3/44 ,  G01N21/65 ,  G01N2021/655 ,  G01N2021/656 ,  H01S3/0078 ,  H01S3/1086 ,  H01S3/2391

Abstract: A noise reduction apparatus includes a first delaying/combining unit configured to output first and second pulse light beams, and a second delaying/combining unit configured to branch the first pulse light beam into two pulse light beams to output third and fourth pulse light beams and branch the second pulse light beam into two pulse light beams to output fifth and sixth pulse light beams.

公开(公告)号：US09970820B2

公开(公告)日：2018-05-15

申请号：US15178444

申请日：2016-06-09

Applicant: Lawrence Livermore National Security, LLC

Inventor： Charles G. Stevens ,  Joseph W. Tringe ,  Christopher T. Cunningham

IPC: G01J5/02 ,  G01J3/453 ,  G01J3/433 ,  G01J3/10

CPC classification number: G01J3/453 ,  G01J3/10 ,  G01J3/4338 ,  G01N21/35

Abstract: According to one embodiment, a heterodyne detection system for detecting light, includes: a first input aperture configured to receive first light from a scene input; a second input aperture configured to receive second light from a local oscillator input; a broadband local oscillator configured to provide the second light to the second input aperture; a dispersive element configured to disperse the first light and the second light; and a final condensing lens coupled to a detector. The final condensing lens is configured to concentrate incident light from a primary condensing lens onto the detector. The detector is configured to sense a frequency difference between the first light and the second light; and the final condensing lens comprises a plasmonic condensing lens. Methods for forming a plasmonic condensing lens to enable room temperature quantum noise limited spectrometry are also disclosed.