公开(公告)号：US2995973A

公开(公告)日：1961-08-15

申请号：US84829759

申请日：1959-10-23

Applicant: BARNES ENG CO

Inventor： BOWLING BARNES ROBERT ,  WARDHAM COLLYER PHILIP

IPC: G01J3/18

CPC classification number: G01J3/02 ,  G01J3/0208 ,  G01J3/0229 ,  G01J3/18

公开(公告)号：US2750836A

公开(公告)日：1956-06-19

申请号：US44610654

申请日：1954-07-27

Applicant: LEEDS & NORTHRUP CO

Inventor： FASTIE WILLIAM G

IPC: G01J3/04 ,  G01J3/18

CPC classification number: G01J3/04 ,  G01J3/18

公开(公告)号：US2094096A

公开(公告)日：1937-09-28

申请号：US75209334

申请日：1934-11-08

Applicant: CUTTING THEODORE A

Inventor： CUTTING THEODORE A

IPC: G01J3/18

CPC classification number: G01J3/18

公开(公告)号：US12130178B2

公开(公告)日：2024-10-29

申请号：US17774405

申请日：2020-11-04

Applicant: Hitachi High-Tech Analytical Science GmbH

Inventor： André Peters ,  Rainer Simons

IPC: G01J3/18 ,  G01J3/02 ,  G01J3/36

CPC classification number: G01J3/0286 ,  G01J3/0291 ,  G01J3/18 ,  G01J3/36

Abstract: The invention relates to an optical emission spectrometer (1) being easily adjustable, and to a method (100) to set-up and operate such a spectrometer (1) comprising a plasma stand (2) to establish a light emitting plasma from sample material, and an optical system (3) to measure the spectrum of the light (L) emitted by the plasma being characteristic to the sample material, where the optical system (3) comprises at least one light entrance aperture (31), at least one diffraction grating (32) to split up the light (L) coming from the plasma (A) and one or more detectors (33) to measure the spectrum of the light (L), wherein the plasma stand (2) and the optical system (3) are directly and fixedly mounted on respective a plasma stand flange (2B) and an optical system flange (3B) which are directly and fixedly connected to each other and wherein the optical emission spectrometer (1) further comprises an analyzing unit (34) adapted to analyze the measured spectrum and to compensate for a drift of the spectrum relative to the detector (33) potentially caused by heat transferred from the plasma stand (2) to the optical system (3) considering the thermal expansion of the optical system (3).

公开(公告)号：US12085447B2

公开(公告)日：2024-09-10

申请号：US17939334

申请日：2022-09-07

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Jae Hwan Lee ,  Young Soo Chung ,  Hyung Bin Son ,  Se Kyu Shim ,  Jung Taek Hong

IPC: G01J3/44 ,  G01J3/02 ,  G01J3/18 ,  G01N21/65

CPC classification number: G01J3/4412 ,  G01J3/0208 ,  G01J3/18 ,  G01N21/65

Abstract: A spectroscopy system that includes a light source that generates light having a plurality of wavelengths, a light transmitter that transmits the light to a target analyte, a light receiver that receives Raman-scattered light scattered from the target analyte, and a multi-wavelength spectroscopy assembly that acquires a spectrum by splitting the Raman-scattered light transmitted from the light receiver. The multi-wavelength spectroscopy assembly includes a single diffraction grating configured to diffract the Raman-scattered light and a single concave mirror configured to focus the Raman-scattered light.

公开(公告)号：US12085445B2

公开(公告)日：2024-09-10

申请号：US17603487

申请日：2020-04-03

Applicant: University of Rochester

Inventor： Changsik Yoon ,  Jannick P. Rolland-Thompson ,  Aaron Bauer

IPC: G01J3/18 ,  G01B9/02091 ,  G01J3/02 ,  G01J3/12

CPC classification number: G01J3/18 ,  G01B9/02091 ,  G01J3/0208 ,  G01J2003/1208

Abstract: A detector system for Fourier spectroscopy such as a spectral domain optical coherence tomography instrument includes a diffractive optic for diffracting the interfering light into angularly dispersed wavenumbers, a prism for reduces a nonlinear angular dispersion among the wavenumbers, and a focusing optic for converting the angularly dispersed wavenumbers from the prism into spatially distributed wavenumbers along a detector having an array of pixels. A field lens between the focusing optic and the detector has a freeform surface for more evenly distributing the wavenumbers along the array of pixels.

公开(公告)号：US12025561B2

公开(公告)日：2024-07-02

申请号：US17604006

申请日：2020-04-15

Applicant: Ohio State Innovation Foundation

Inventor： Heather Allen ,  Juan Velez

IPC: G01N21/65 ,  G01J3/18 ,  G01J3/28 ,  G01J3/44

CPC classification number: G01N21/65 ,  G01J3/18 ,  G01J3/2823 ,  G01J3/4412 ,  G01N2201/06113 ,  G01N2201/1296

Abstract: A hand-held sized imaging instrument identifies molecules with high selectivity and in complex mixtures. The instrument uses inelastic scattering and scattering intensities from with machine learning algorithms based on convolutional neural networks (CNN's) to identify the presence of a specified chemical or combination of chemicals. A laser is housed within the instrument to initiate a material response of a sample using laser light of a specified wavelength. The instrument uses an image sensor to capture visible images with inelastic scattering information. The CNN is able to classify the image to determine whether the specified chemical or combination of chemicals is present in the sample. The instrument is inexpensive, portable, easy to use by anyone (nonchemist, nonprofessional), and safe (laser is completely housed). The instrument can be used efficiently and easily for quality control, security, and other applications to reliably detect the presence of specified substances.

公开(公告)号：US11976971B2

公开(公告)日：2024-05-07

申请号：US17272667

申请日：2019-09-04

Applicant: Michigan Aerospace Corporation

Inventor： Will Johnson

IPC: G01J3/02 ,  F21V8/00 ,  G01J3/18 ,  G01J3/28 ,  G01S17/95

CPC classification number: G01J3/0221 ,  G01J3/18 ,  G01J3/2803 ,  G01S17/95 ,  G02B6/0008 ,  G01J2003/2813

Abstract: Spectrographic measurements are often limited by the amount of light that is available. Photons that are not collected or measured reduce the signal to noise and therefore reduce measurement precision. This invention collects the zero order light and sends it through the spectrometer again. In an atmospheric LIDAR, the zero order recycling is estimated to increase the rotational Raman signal by an additional 20%. A grating based spectrometer where the zero order light is collected by a lens or mirror and focused into a fiber optic that sends the light to the input slit where it is directed into the spectrometer again. There can be a plurality of recycle fibers. The detector can be either a single linear array or a two dimensional array such as a CCD or CMOS camera.

公开(公告)号：US20240102859A1

公开(公告)日：2024-03-28

申请号：US18010430

申请日：2022-09-07

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Ki Hun Jeong ,  Jung Woo Park ,  Jae Hun Jeon ,  Gi Beom Kim

IPC: G01J3/02 ,  G01J3/04 ,  G01J3/18 ,  G01J3/28

CPC classification number: G01J3/0259 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/04 ,  G01J3/18 ,  G01J3/2803

Abstract: The disclosure relates to an ultrathin micro-spectrometer and a method of manufacturing the same, and more particularly, relates to an ultrathin micro-spectrometer including: a lens portion including: a convex lens; and a back-reflection grating layer which is formed on a rear surface of the convex lens and on the same surface of which a reflective diffraction grating and a first planar reflector are arranged; a substrate layer which is disposed to be spaced apart from the lens portion and on which a light incidence microslit is formed; a second planar reflector which is formed on the substrate layer; and a complementary metal-oxide-semiconductor (CMOS) sensor on which light reflected by the lens portion is focused, and a method of manufacturing the same.

公开(公告)号：US11933735B2

公开(公告)日：2024-03-19

申请号：US17440896

申请日：2020-03-25

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi

IPC: G01N21/88 ,  G01J3/18 ,  G01J3/42 ,  G01N21/31

CPC classification number: G01N21/8806 ,  G01J3/18 ,  G01J3/42 ,  G01N21/31 ,  G01N2021/8845 ,  G01N2021/8854

Abstract: An optical detection device is an optical detection device that detects a desired wavelength component included in input light, and includes: a spectrometer including, for instance, a diffraction grating that receives the input light as an input and outputs an alignment of spectra each of which is a duplication of a spectrum of the input light; a second slit array including an array of three or more slits that pass light beams of wavelengths at three or more locations in the alignment of the spectra that are output from the spectrometer; and an imaging element composed of an array of pixels that receive the light beams, having passed through the second slit array, each of the light beams having three or more wavelength components. At least two pitches between slits are different in the array of the three or more slits included in the second slit array.