公开(公告)号：US20230025030A1

公开(公告)日：2023-01-26

申请号：US17938515

申请日：2022-10-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KATSUYA NOZAWA

IPC: G01J3/433 ,  G01J3/28 ,  G01J3/02

Abstract: An imaging system includes: a first light source that emits first light having a spectrum including discrete first frequency components arranged at first frequency intervals; a second light source that emits second light having a spectrum including discrete second frequency components arranged at second frequency intervals, the second frequency intervals being different from the first frequency intervals; a mixing optical system that mixes the first light and the second light to generate third light including at least one optical beat the intensity of which changes at a beat frequency expressed by the difference between at least one of the discrete first frequency components and at least one of the discrete second frequency components; an imaCCging element having a variable sensitivity in an exposure period; and a control circuit that changes the sensitivity of the imaging element at the beat frequency of the at least one optical beat.

公开(公告)号：US20220364923A1

公开(公告)日：2022-11-17

申请号：US17622641

申请日：2020-06-19

Applicant: UNIVERSIDAD CARLOS III DE MADRID

Inventor： Pedro MARTÍN MATEOS ,  Cristina DE DIOS FERNÁNDEZ ,  Óscar Elías BONILLA MANRIQUE ,  Guillermo Andrés GUARNIZO HERREÑO

IPC: G01J3/45 ,  G01J3/28 ,  G01J3/433

Abstract: A method for generating a illumination dual-comb signal that provides a low frequency train of interferograms (180) readable by a regular video-rate camera (160) comprising N pixels and a sampling frequency of V Hz to extract hyperspectral information (170), the method comprising providing a monochromatic signal, splitting the monochromatic signal in two split monochromatic signals, frequency shifting each monochromatic signal with an offset frequency below V 2 ⁢ Hz , generating two frequency combs having a difference in repetition below V 2 ⁢ Hz by a nonlinear modulation of the two split monochromatic signals, generate the illumination dual-comb signal, Illuminating a target and employing a video-rate camera (160) to read a low frequency train of interferograms (180) based on a reflected and/or transmitted signal of the illumination dual-comb signal and performing Fourier transformation of the low frequency train of interferograms (180) detected by each pixel from the N pixels to extract the hyperspectral information (170).

公开(公告)号：US11408768B2

公开(公告)日：2022-08-09

申请号：US16870158

申请日：2020-05-08

Applicant: NOVATRANS GROUP SA

Inventor： John F. Roulston ,  Daniel Mandelik

IPC: G01J3/10 ,  G01J3/433 ,  G01N21/3581 ,  G01J3/42

Abstract: A terahertz spectrometer includes: a terahertz-wave emitter and a terahertz receiver elements. The terahertz wave generated by means of generating beat frequency corresponding to the difference between two rapidly tunable continuous wave lasers. Having a difference in time between the interrogating signal and the reference signal at the receiver end side, which corresponds to intermediate frequency (IF), not centered around the baseband, i.e. zero Hertz. The offset step size of the intermediate frequency from zero Hertz is linearly correlated to the position of the interrogated object position.

公开(公告)号：US11320517B2

公开(公告)日：2022-05-03

申请号：US16548722

申请日：2019-08-22

Applicant: QUALCOMM Incorporated

Inventor： Roberto Rimini ,  Tsai-Chen Huang

IPC: G06F9/44 ,  G01S7/41 ,  H04W52/36 ,  H04W52/28 ,  H04B7/0426 ,  G01J3/433 ,  G01S13/28 ,  A61B5/00 ,  A61B3/10

Abstract: Aspects of the disclosure relate to classifying a target object. An electronic device may transmit a detection signal and receive a reflection signal reflected from the target object. The electronic device then determines, based on one or more features of the reflection signal, a category of the target object and adjusts at least one transmission parameter based on the category. The electronic device then transmits an adjust signal using the transmission parameter. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20220102930A1

公开(公告)日：2022-03-31

申请号：US17546153

申请日：2021-12-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TASUKU NAKAMURA ,  YASUHISA INADA

IPC: H01S3/086 ,  G01J3/02 ,  G01J3/427 ,  G01J3/433 ,  H01S3/00

Abstract: A dual optical frequency comb light-emitting device includes a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length, a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length, and an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator. The first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside. The second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside.

公开(公告)号：US20210313709A1

公开(公告)日：2021-10-07

申请号：US16841871

申请日：2020-04-07

Applicant: Ramot at Tel-Aviv University Ltd.

Inventor： Tal Ellenbogen ,  Shay Keren-Zur

IPC: H01Q21/12 ,  G01N21/3581 ,  G01J3/433

Abstract: Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of asymmetric point antennas formed on the substrate and excitable by a pump pulse of radiation to radiate THz radiation the point antennas having characteristic dimensions substantially smaller than wavelengths of the radiated THz; wherein the array comprises point antennas aligned in different directions.

公开(公告)号：US11112308B2

公开(公告)日：2021-09-07

申请号：US16763955

申请日：2018-11-14

Applicant: Bridger Photonics, Inc.

Inventor： Aaron Thomas Kreitinger ,  Michael James Thorpe

IPC: G01N21/00 ,  G01J3/433 ,  G01N21/39 ,  G01J3/42 ,  G01S17/88

Abstract: Embodiments of the disclosure are drawn to apparatuses and methods for anomalous gas concentration detection. A spectroscopic system, such as a wavelength modulated spectroscopy (WMS) system may measure gas concentrations in a target area. However, noise, such as speckle noise, may interfere with measuring relatively low concentrations of gas, and may lead to false positives. A noise model, which includes a contribution from a speckle noise model, may be used to process data from the spectroscopic system. An adaptive threshold may be applied based on an expected amount of noise. A speckle filter may remove measurements which are outliers based on a measurement of their noise. Plume detection may be used to determine a presence of gas plumes. Each of these processing steps may be associated with a confidence, which may be used to determine an overall confidence in the processed measurements/gas plumes.

公开(公告)号：US11092493B2

公开(公告)日：2021-08-17

申请号：US16714518

申请日：2019-12-13

Applicant: Picarro, Inc.

Inventor： Alejandro Dario Farinas ,  John A. Hoffnagle ,  Chris W. Rella ,  Sze Meng Tan

IPC: G01J3/28 ,  G01J3/433

Abstract: Improved cavity enhanced absorption spectroscopy is provided using a piecewise tunable laser by using a lookup table for laser tuning that is configured specifically for this application. In preferred embodiments this is done in combination with a laser control strategy that provides precise wavelength determination using cavity modes of the instrument as a reference.

公开(公告)号：US20210215602A1

公开(公告)日：2021-07-15

申请号：US17082095

申请日：2020-10-28

Applicant: Block Engineering, LLC

Inventor： Petros Kotidis ,  Erik Deutsch ,  Ninghui Zhu ,  Daniel J. Cavicchio, JR.

IPC: G01N21/39 ,  B82Y20/00 ,  G01N21/35 ,  H01S5/00 ,  H01S5/14 ,  H01S5/34 ,  G01J3/433 ,  G01J3/10 ,  G01J3/45 ,  G02B21/06 ,  H01S5/40 ,  G01J3/26 ,  G01N21/27 ,  G02B21/00

Abstract: A spectroscopy system comprising at least two laser modules, each of the laser modules including a laser cavity, a quantum cascade gain chip for amplifying light within the laser cavity, and a tuning element for controlling a wavelength of light generated by the modules. Combining optics are used to combine the light generated by the at least two laser modules into a single beam and a sample detector detects the single beam returning from a sample.

公开(公告)号：US20210018432A1

公开(公告)日：2021-01-21

申请号：US17063483

申请日：2020-10-05

Applicant: Apple Inc.

Inventor： Miikka M. Kangas ,  Mark Alan Arbore ,  David I. Simon ,  Michael J. Bishop ,  James W. Hillendahl ,  Robert Chen

IPC: G01N21/27 ,  G01N21/35 ,  G01N21/47 ,  G01J3/32 ,  G01J3/36 ,  G01J3/433 ,  G01J3/447 ,  G01J3/02 ,  G01J3/42

Abstract: This relates to systems and methods for measuring a concentration and type of substance in a sample at a sampling interface. The systems can include a light source, optics, one or more modulators, a reference, a detector, and a controller. The systems and methods disclosed can be capable of accounting for drift originating from the light source, one or more optics, and the detector by sharing one or more components between different measurement light paths. Additionally, the systems can be capable of differentiating between different types of drift and eliminating erroneous measurements due to stray light with the placement of one or more modulators between the light source and the sample or reference. Furthermore, the systems can be capable of detecting the substance along various locations and depths within the sample by mapping a detector pixel and a microoptics to the location and depth in the sample.