US 12,669,376 B2Granted

Apparatus and a method for carrying out spectroscopy

AssigneeLightnovo ApS

InventorsOleksii Ilchenko, Yurii Pilhun, Andrii Kutsyk

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Abstract

An apparatus obtains a first spectrum beam from an interaction between a first portion of a laser beam and a sample and a second spectrum beam from an interaction between a second portion of the laser beam and a reference sample. A diffraction element splits the first spectrum beam into a first spectrum associated with the sample and splits the second spectrum beam into a second spectrum associated with the reference sample. A detector with pixels for detecting the first and second spectrum. A data acquisition device carries out a measurement, wherein first data indicative of the first spectrum is detected and second data indicative of the second spectrum is detected, wherein the first data is collected in different pixels than the second data. The data acquisition device: a) determines a point spread function PSF using a convolution function; and b) determines a real spectrum of the sample using the PSF.

Claims20

Dependent claims

An apparatus for carrying out spectroscopy, in particular Raman spectroscopy, on a sample,

the apparatus being configured to obtain a first spectrum beam from an interaction between a first portion of a laser beam and a sample and a second spectrum beam from an interaction between a second portion of the laser beam and a reference sample,
the apparatus comprises an optical system which is configured to guide the first spectrum beam and the second spectrum beam to a diffraction element,
the diffraction element being configured to split the first spectrum beam into a first spectrum of spatially separated wavelength components associated with the sample and to split the second spectrum beam into a second spectrum of spatially separated wavelength components associated with the reference sample;
the apparatus comprising a detector with an array of pixels for detecting the first and second spectrum;
the apparatus comprising a data acquisition device which is configured:
to carry out at least one measurement using the detector, wherein, simultaneously, first data which is indicative of the first spectrum of spatially separated wavelength components is detected over time by the array of pixels and second data which is indicative of the second spectrum of spatially separated wavelength components is detected over time by the array of pixels, wherein the first data is collected in different pixels than the second data;
the data acquisition device being further configured to carry out the following processes:
a) determining a point spread function PSF from the second data related to a measured spectrum of the reference sample and a predetermined spectrum of the reference sample, wherein the PSF is determined using a convolution function that provides a predetermined relationship between the PSF, a measured spectrum in the second data and an ideal spectrum of the reference sample;
b) determining a real spectrum of the sample using the determined PSF and the first data related to the measured spectrum of the sample.

6 more elements

A computer implemented method for carrying out spectroscopy, in particular Raman spectroscopy, on a sample, wherein the method uses an apparatus which is configured to obtain a first spectrum beam from an interaction between a first portion of a laser beam and a sample and to obtain a second spectrum beam from an interaction between a second portion of the laser beam and a reference sample,

wherein the apparatus comprises an optical system which is configured to guide the first spectrum beam and the second spectrum beam to a diffraction element, and the diffraction element is configured to split the first spectrum beam into a first spectrum of spatially separated wavelength components associated with the sample and to split the second spectrum beam into a second spectrum of spatially separated wavelength components associated with the reference sample, wherein the apparatus further comprises a detector with an array of pixels for detecting the first and second spectrum, and wherein the method comprises:
detecting, simultaneously and as a function of time, first data which is indicative of the first spectrum of spatially separated wavelength components on the array of pixels and second data which is indicative of the second spectrum of spatially separated wavelength components on the array of pixels, wherein the first data is collected in different pixels than the second data,
determining a point spread function PSF from the second data related to a measured spectrum of the reference sample and a predetermined spectrum of the reference sample, wherein the PSF function is determined using a convolution function that provides a predetermined relationship between the PSF, a measured spectrum and a spectrum in the second data and an ideal spectrum of the reference sample;
determining a real spectrum of the sample using the determined PSF and the first data related to the measured spectrum of the sample.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 18/804,595Filed 14 Aug 2024
Published: US 2026/0049868 A119 Feb 2026
Granted: 30 Jun 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01J 3/44
Investigating the spectrum: raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
G01J 3/1895
Using diffraction elements, e.g. grating: using fiber Bragg gratings or gratings integrated in a waveguide
G01N 21/65
Optically excited: raman scattering
G01J 2003/284
Computer-interfaced: spectral construction