公开(公告)号：US20210131868A1

公开(公告)日：2021-05-06

申请号：US16622906

申请日：2018-06-15

Applicant: IRsweep AG

Inventor： Andreas HUGI

IPC: G01J3/10 ,  G01J3/433

Abstract: A heterodyne detection spectrometer setup comprises an optical path with at least a first cavity able to emit a first laser beam; a second cavity able to emit a second laser beam; and at least one combining and/or reflecting element. The cavities are connected to current drivers for stimulating laser emission, which shows increased signal-to-noise ratios of the heterodyne signal and an increased dynamic range. This can be reached if at least the second cavity comprises an active medium connected to a heterodyne signal extraction element and a (multi-) heterodyne signal processing unit, which is simultaneously usable for laser light generation and as detector element, comprising an active medium introduced in the optical path in order that the first and/or second laser beam can enter the respective other cavity. At least one reference path is established between the two cavities in the optical path with at least two combining and/or reflecting elements.

公开(公告)号：US10996108B2

公开(公告)日：2021-05-04

申请号：US16641010

申请日：2018-05-29

Applicant: KONICA MINOLTA, INC.

Inventor： Yoshiroh Nagai

IPC: G01J3/02 ,  G01J3/10 ,  G01J3/06

Abstract: A system and method include a wavelength shift correction light source emitting wavelength shift correction emission-line light and a spectrometer including: a spectroscopic unit receiving with photoelectric conversion elements rays of dispersed spectral light obtained by dispersing incident light based on wavelength, and outputs electrical signals corresponding to light intensities of the rays of dispersed spectral light; and a unit that measures temperature of the spectroscopic unit. When the wavelength shift correction emission-line light is measured as the incident light with the spectrometer, this system and method determine wavelength shift correction time emission-line wavelength corresponding to wavelength shift correction emission-line light, based on electrical signals from photoelectric conversion elements receiving wavelength shift correction emission-line light, and the measured temperature. The system and method determine wavelength variation from the difference between determined wavelength shift correction time emission-line wavelength and known emission-line wavelength of the wavelength shift correction emission-line light.

公开(公告)号：US10987459B2

公开(公告)日：2021-04-27

申请号：US16485470

申请日：2018-02-15

Applicant: FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH

Inventor： Andreas Rose ,  Sylvia Heinitz

IPC: A61M1/16 ,  B01D61/24 ,  G01D18/00 ,  G01J3/02 ,  G01J3/10 ,  G01N21/27 ,  A61M1/36

Abstract: The invention relates to a method and to an assembly for calibrating devices 11 for detecting blood or blood components in a liquid, in particular dialysate, which devices comprise a light transmitter 17 and a light receiver 18, and an evaluation unit 20 that receives the signal from the light receiver 18 and is designed such that blood or blood components in the liquid are detected on the basis of the weakening of radiation passing through the liquid. The method according to the invention is based on the fact that the calibration of the devices 11 for detecting blood or blood components is carried out without the use of blood. The calibration is carried out using an absorption standard 30, which has predetermined optical properties in relation to the absorption of the light in blood, the absorption standard 30 being arranged in the beam path 19 between the light transmitter 17 and the light receiver 18. The absorption standard 30 makes it possible to identify defined spectral weakening in the light depending on the components of the blood, in particular haemoglobin. Since, by contrast with blood, the absorption standard 30 does not bring about any scattering, meaning that the beam path is influenced in a different way from blood, the calibration is also carried out using a scattering standard 36, which has predetermined optical properties in relation to the scattering of the light in blood. The assembly also comprises a beam deflection unit 22 for coupling out light for a spectral measurement of the light transmitter 17 using a spectrometer 27.

公开(公告)号：US10969276B2

公开(公告)日：2021-04-06

申请号：US16446197

申请日：2019-06-19

Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)

Inventor： Tobias Kippenberg ,  Hairun Guo ,  Junqiu Liu ,  Wenle Weng

IPC: G01J3/10 ,  G02F1/365 ,  G02F1/35

Abstract: A dual-frequency-comb spectrometer and a method for spectroscopic investigation of a sample are described. The spectrometer includes first and second frequency comb devices for emitting laser pulses along first and second light paths, wherein the repetition frequency of the laser pulses emitted by the second device is offset from that of the first device. First and second multi-core waveguides including at least two separate single core waveguides having field-coupling via a coupling gap therebetween are arranged in the first and second light paths. The sample is irradiated by the second frequency comb in the second light path. A detector device is arranged in a third light path where the first and second light paths are combined, for simultaneously sensing the first frequency comb and the second frequency comb after an interaction with the sample. A computing device receives output of the detector device and calculates spectroscopic properties of the sample.

公开(公告)号：US10955292B2

公开(公告)日：2021-03-23

申请号：US16307686

申请日：2017-06-12

Applicant: BOMILL AB

Inventor： Bo Löfqvist ,  Per Horvath

IPC: G01J3/10 ,  B07C5/34 ,  G01J3/28 ,  G01J3/36 ,  G01J3/02 ,  G01N21/31 ,  G01J3/32 ,  G01N21/85

Abstract: A detector system is disclosed herein that includes a plurality of light guides. Each light guide is guiding incoming light from a respective object in use, wherein the incoming light is provided by means of an illuminating means. The detector system comprises diffracting means for diffracting the incoming light in different wavelength ranges, at least one focuser for projecting the incoming light exiting the light guides onto the diffracting means, a detector having a detector area for receiving the diffracted light from the plurality of Sight guides, and a control unit. These are arranged to pulsate incoming light via only one light guide at a time based on a pulse timing parameter, and record a spectrum of light diffracted from each light guide and detected by the detector based on the pulse timing parameter.

公开(公告)号：US10948346B2

公开(公告)日：2021-03-16

申请号：US15586720

申请日：2017-05-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dong Ho Kim

IPC: G01J3/10 ,  G01J3/44 ,  G01J3/32 ,  A61B5/145 ,  A61B5/1455 ,  G01J3/28

Abstract: A spectrometer according to one aspect may include a plurality of light sources configured to emit light to a target object, a plurality of wavelength controllers installed on one surface of each of the plurality of light sources and configured to adjust a peak wavelength band of each of the light sources, and a detection unit configured to detect light returning from the target object.

公开(公告)号：US10945607B2

公开(公告)日：2021-03-16

申请号：US15781630

申请日：2016-12-13

Applicant: HORIBA, Ltd.

Inventor： Seichi Sato

IPC: A61B5/00 ,  G01J3/02 ,  G01J3/10 ,  G01J3/18 ,  G02B27/42 ,  G01J3/12 ,  A61B90/00 ,  A61B3/10 ,  A61B3/12

Abstract: This invention is to provide a spectroscope that can improve resolution and reduce loss of light intensity and/or distortion of a wave front while enabling detection of the optical spectrum for each of a plurality of polarization components in incident light. The spectroscope is a spectroscope that comprises a first diffraction grating 51 to which at least a transmitted light or a reflected light from an object to be measured enters, which diffracts a first polarization component of the incident light and which transmits a second polarization component that is different from the first polarization component of the incident light without diffraction, and a first light-receiving element 55 that receives a spectrum of the light diffracted by the first diffraction grating 51.

公开(公告)号：US10944953B2

公开(公告)日：2021-03-09

申请号：US16427101

申请日：2019-05-30

Applicant: ALIGN TECHNOLOGY, INC.

Inventor： Noam Babayoff

IPC: H04N13/15 ,  G01B11/25 ,  H04N13/207 ,  H04N13/257 ,  H04N13/271 ,  H04N13/296 ,  A61B1/00 ,  A61B1/06 ,  A61B1/24 ,  A61B1/247 ,  A61B5/00 ,  A61B5/107 ,  G01B11/24 ,  G01J3/02 ,  G01J3/10 ,  G01J3/50 ,  G06T7/12 ,  G06T7/90 ,  A61C9/00 ,  G06T7/00 ,  G01N21/25 ,  H01L27/148 ,  A61C19/04 ,  G01J3/46 ,  G01J3/51

Abstract: A device for determining the surface topology and associated color of a structure, such as a teeth segment, includes a scanner for providing depth data for points along a two-dimensional array substantially orthogonal to the depth direction, and an image acquisition means for providing color data for each of the points of the array, while the spatial disposition of the device with respect to the structure is maintained substantially unchanged. A processor combines the color data and depth data for each point in the array, thereby providing a three-dimensional color virtual model of the surface of the structure. A corresponding method for determining the surface topology and associate color of a structure is also provided.

公开(公告)号：US10942064B2

公开(公告)日：2021-03-09

申请号：US16673592

申请日：2019-11-04

Applicant: OMNI MEDSCI, INC.

Inventor： Mohammed N. Islam

IPC: G01J3/10 ,  H01S3/067 ,  H01S3/30 ,  G01B9/02 ,  G01J3/02 ,  H01S5/00 ,  H01S5/10 ,  H01S5/14 ,  G01J3/42 ,  G02B6/293 ,  G02F1/365 ,  H01S3/094 ,  H01S5/40 ,  G02F1/35 ,  H01S3/102

Abstract: A diagnostic system is provided with a plurality of semiconductor light emitters, each configured to generate an optical beam, and a beam combiner to generate a multiplexed optical beam. An optical fiber or waveguide communicates at least a portion of the multiplexed optical beam to form an output beam, wherein the output beam is pulsed. A filter, coupled to at least one of a lens and a mirror to receive at least a portion of the output beam, forms an output light. A beam splitter splits the light into a sample arm and a reference arm and directs at least a portion of the sample arm light to a sample. A detection system is configured to receive from the sample at least a portion of reflected sample light, to generate a sample detector output, and to use a lock-in technique with the pulsed output beam.

公开(公告)号：US20210058569A1

公开(公告)日：2021-02-25

申请号：US16844908

申请日：2020-04-09

Applicant: Hypermed Imaging, Inc.

Inventor： Mark Anthony Darty ,  Michael Tilleman ,  Peter Meenen ,  Dmitry Yudovsky

IPC: H04N5/33 ,  G01J3/02 ,  G01J3/28 ,  H04N5/235 ,  H04N5/225 ,  G01J3/10 ,  G01J3/36

Abstract: Provided are methods and systems for concurrent imaging at multiple wavelengths. In one aspect, a hyperspectral/multispectral imaging device includes a lens configured to receive light backscattered by an object, a plurality of photo-sensors, a plurality of bandpass filters covering respective photo-sensors, where each bandpass filter is configured to allow a different respective spectral band to pass through the filter, and a plurality of beam splitters in optical communication with the lens and the photo-sensors, where each beam splitter splits the light received by the lens into a plurality of optical paths, each path configured to direct light to a corresponding photo-sensor through the bandpass filter corresponding to the respective photo-sensor.