公开(公告)号：US20200041344A1

公开(公告)日：2020-02-06

申请号：US16522599

申请日：2019-07-25

Applicant: THERMO ELECTRON SCIENTIFIC INSTRUMENTS LLC

Inventor： William R. Finch ,  Francis J. Deck

IPC: G01J3/18 ,  G01J3/26 ,  G01J3/02

Abstract: A stray light reducing apparatus includes a light source and an entrance slit positioned to pass through light from the light source. A first monochromator mirror is positioned to reflect light passed through the entrance slit. A diffractive surface is positioned to receive and diffract light reflected by the first monochromator mirror. A second monochromator mirror is positioned to reflect light diffracted by the diffractive surface. An exit slit is positioned to pass through light reflected by the second monochromator mirror. A cuvette is positioned to pass through light passed through the exit slit. A long-pass interference filter is positioned to receive light from the light source, reflect light that has a wavelength below a selected value, and pass through light having a wavelength above the selected value. A first sample detector is positioned to receive light reflected by the long-pass interference filter.

公开(公告)号：US10545049B2

公开(公告)日：2020-01-28

申请号：US15321757

申请日：2015-06-17

Applicant: Spectral Engines Oy

Inventor： Jarkko Antila

IPC: G01J3/26 ,  G01J3/02 ,  G01J3/28 ,  G01J3/45 ,  G01J9/02 ,  G02B5/20 ,  G02F1/21

Abstract: A method for determining spectral calibration data (λcal(Sd), Sd,cal(λ)) of a Fabry-Perot interferometer (100) comprises: forming a spectral notch (NC2) by filtering input light (LB1) with a notch filter (60) such that the spectral notch (NC2) corresponds to a transmittance notch (NC1) of the notch filter (60), measuring a spectral intensity distribution (M(Sd)) of the spectral notch (NC2) by varying the mirror gap (dFP) of the Fabry-Perot interferometer (100), and by providing a control signal (Sd) indicative of the mirror gap (dFP), and determining the spectral calibration data (λcal(Sd), Sd,cal(λ)) by matching the measured spectral intensity distribution (M(Sd)) with the spectral transmittance (TN(λ)) of the notch filter (60).

公开(公告)号：US20200025612A1

公开(公告)日：2020-01-23

申请号：US16251290

申请日：2019-01-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： SANG KYU KIM ,  JUN HO LEE ,  HYEONG SEOK JANG

IPC: G01J3/26 ,  G01J3/28 ,  G01N21/359

Abstract: Provided is a spectrum processing apparatus for removing noise, caused by a change in external environment, from a spectrum obtained by a spectrometer. The spectrum processing apparatus includes: a spectrometer configured to measure a first spectrum according to a change in external environment from a first object, and to measure a second spectrum for component analysis from a second object; and a processor configured to extract, based on the first spectrum, an eigenvector for each wavelength according to the change in external environment, and to obtain a final spectrum by correcting the second spectrum based on the extracted eigenvector for each wavelength.

公开(公告)号：US20200025611A1

公开(公告)日：2020-01-23

申请号：US16037855

申请日：2018-07-17

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Jiangquan Mai ,  Wai Yi Yeung ,  Siddharth Arunkumar Agrawal ,  Chun Zhang

IPC: G01J3/02 ,  G01J3/26 ,  G01J3/45 ,  G01N21/25

Abstract: Systems and methods which provide a compact spectrometer using static Fourier transform interferometer (SFTI) cube configurations, such as are suitable for use with respect to mobile and portable electronic devices, are described. A SFTI cube of embodiments comprises a monolithic dual mirrored wedge beam splitter structure wherein mirrored wedge surfaces provide two reflective mirrors that are slightly tilted away from the orthogonal directions so that the resultant beams of light cross over one another and form an interference pattern. SFTI cube implementations of embodiments facilitate highly compact spectrometer configurations having a wide wavelength range, high resolution, high throughput, and low cost.

公开(公告)号：US20200003686A1

公开(公告)日：2020-01-02

申请号：US16454114

申请日：2019-06-27

Applicant: Seiko Epson Corporation

Inventor： Hideaki KASAHARA

IPC: G01N21/55 ,  G01J3/26 ,  G01J3/50 ,  G01J3/02

Abstract: A measurement device includes a plurality of light sources configured to emit light toward a measurement object, and having a same emission spectrum, a spectroscopic measurement section configured to perform spectroscopic measurement on the light reflected by the measurement object, a light source switching section configured to switch a combination of the light sources to be put on or off out of the plurality of light sources, and an arithmetic section configured to calculate the spectral reflectivity of the measurement object based on a spectroscopic measurement result obtained by the spectroscopic measurement section when putting on or off the plurality of light sources with a plurality of the combinations.

公开(公告)号：US10514298B2

公开(公告)日：2019-12-24

申请号：US15770656

申请日：2016-12-01

Applicant: IISM INC.

Inventor： Seung Min Jin ,  Il Seung Yang ,  Yun Mi Bae ,  Seong Oak Park ,  Yu Sic Kim ,  Du Cheon Choi ,  Mu Hyeop Han

IPC: G01J3/28 ,  G01J3/02 ,  G01J3/12 ,  G01J3/26 ,  G02B5/28 ,  G01J3/18

Abstract: A spectrophotometer is provided, which comprises a receiving part diffusing an incident light, a first broadband filter group, and a detector detecting the light having passed through the first broadband filter group, in order to easily select and detect a plurality of lights having specific wavelengths, wherein the first broadband filter group comprises a first broadband filter arranged to have a first angle with respect to an incident direction of light to enable the incident light to pass through a first wavelength band, a second broadband filter arranged to have a second angle, which is different from the first angle, with respect to an incident direction of light to enable the light having passed through the first broadband filter to pass through a second wavelength band, and a first path compensation means for adjusting a path of the light having passed through the second broadband filter to be identical to a path of the light having passed through the first broadband filter, wherein the first broadband filter, the second broadband filter and the first path compensation means are arranged in series with respect to the incident direction of light. Accordingly, it is possible to increase the efficiency of the outputted light compared to the incident light, and to detect a plurality of lights having the desired specific wavelengths at the same time.

公开(公告)号：US10466103B2

公开(公告)日：2019-11-05

申请号：US16106712

申请日：2018-08-21

Applicant: Seiko Epson Corporation

Inventor： Hideaki Kasahara ,  Masashi Kanai

IPC: G01J3/26 ,  G01J3/02 ,  G01J3/28 ,  G01J3/45 ,  G01J3/51 ,  G01J3/52

Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.

公开(公告)号：US10466100B2

公开(公告)日：2019-11-05

申请号：US15045895

申请日：2016-02-17

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  IMEC VZW

Inventor： Seongho Cho ,  Tom Claes ,  Dongho Kim

IPC: G01J3/02 ,  G02B6/124 ,  G01N21/27 ,  G01J3/18 ,  G01N21/47 ,  A61B5/145 ,  A61B5/1455 ,  A61B5/00 ,  G01J3/26 ,  G01J3/36 ,  G02B6/10 ,  G02B6/27 ,  G01J3/12 ,  G02B6/34

Abstract: Provided are a dual coupler device configured to receive lights of different polarization components, a spectrometer including the dual coupler device, and a non-invasive biometric sensor including the spectrometer. The dual coupler device may include, for example, a first coupler layer configured to receive a light of a first polarization component among incident lights. and a second coupler layer configured to receive a light of a second polarization component among the incident lights, wherein a polarization direction of the light of the first polarization component is perpendicular to a polarization direction of the light of the second polarization component. The first coupler layer and the second coupler layer may be spaced apart from each other and extended along a direction in which the light propagates in the first coupler layer and the second coupler layer.

公开(公告)号：US10444143B2

公开(公告)日：2019-10-15

申请号：US15320260

申请日：2015-06-24

Applicant: VALMET AUTOMATION OY

Inventor： Markku Mäntylä ,  Pekka Suopajärvi ,  Jussi Tenhunen ,  Janne Paaso

IPC: G01N21/3559 ,  G01N33/34 ,  G01N21/89 ,  D21F7/00 ,  G01J3/10 ,  G01N21/86 ,  G01J3/12 ,  G01J3/26

Abstract: Optical multi-channel measurement unit for a process measurement includes first ends for receiving optical radiation from the optical radiation source, and second ends for outputting the optical radiation for illuminating the at least one object. Optical detectors receive optical radiation from at least one measurement channel via at least one optical filter and convert an intensity of the optical radiation to an electrical signal. A movement mechanism causes, for filtering the wavelengths of the optical radiation propagating between detectors and the optical measurement channels through the optical filters, at least one of the following: movement inside at least one optical filter and movement between the filters and the detectors.

公开(公告)号：US10444007B2

公开(公告)日：2019-10-15

申请号：US15870920

申请日：2018-01-13

Applicant: Massachusetts Institute of Technology

Inventor： Yi Chen Mazumdar ,  Ian W. Hunter

IPC: G01J3/453 ,  G01B11/14 ,  G06K9/00 ,  G01J3/28 ,  G01J3/26

Abstract: A spectral imaging system includes an autocorrelator to generate different autocorrelations when the moving reflector in the autocorrelator is at different positions so as to reconstruct spectral images. The system also includes a position measurement system to measure the actual positions of the moving reflector when autocorrelations are taken. These actual locations, instead of the desired locations in conventional methods, are then used to reconstruct the spectral image. This approach can address the misalignment of the moving reflector from its desired location (due to external disturbances, slow actuator dynamics, and other factors) in conventional spectral imaging techniques and allow the development of high-resolution, high-stability, portable imaging spectrometers for the general public.