US 12,345,646 B2
Combined spectroscopy system including Raman and ATR-FTIR
Andreas Seifert, San Sebastian (ES); and Gajendra Pratap Singh, San Sebastian (ES)
Assigned to ASOCIACIÓN CENTRO DE INVESTIGACIÓN COOPERATIVA EN NANOCIENCIAS “CIC NANOGUNE”, San Sebastian (ES)
Appl. No. 17/998,508
Filed by ASOCIACION CENTRO DE INVESTIGACION COOPERATIVE EN NANOCIENCIAS “CIC NANOGUNE”, San Sebastian (ES)
PCT Filed May 11, 2021, PCT No. PCT/EP2021/062511
§ 371(c)(1), (2) Date Nov. 11, 2022,
PCT Pub. No. WO2021/228873, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 20382389 (EP), filed on May 12, 2020.
Prior Publication US 2023/0194428 A1, Jun. 22, 2023
Int. Cl. G01N 21/65 (2006.01); G01J 3/10 (2006.01); G01J 3/42 (2006.01); G01J 3/44 (2006.01); G01N 21/35 (2014.01); G01N 21/552 (2014.01)
CPC G01N 21/65 (2013.01) [G01J 3/108 (2013.01); G01J 3/42 (2013.01); G01J 3/44 (2013.01); G01N 21/35 (2013.01); G01N 21/552 (2013.01); G01N 2021/3595 (2013.01)] 22 Claims
OG exemplary drawing
 
1. System for simultaneous measurement of Raman and infrared absorption signals from a sample, the system comprising:
an ATR crystal adapted for holding the sample thereon,
at least one Raman excitation light source for Raman excitation,
at least one FTIR excitation light source for FTIR excitation,
at least one photodetector configured for collecting signals with a wavelength comprised at least in one of an IR spectrum and/or a Raman spectrum,
a wavelength-dispersive device for collected Raman signals,
an excitation lens, and
collection optics comprising a first collection lens,
wherein the ATR crystal is configured to receive a light beam from the at least one FTIR excitation light source, to redirect the light beam to the sample, to receive modified reflected radiation due to interaction of an evanescent field with the sample and to redirect it so that it can be received by the at least one photodetector,
wherein the excitation lens and the ATR crystal are positioned so that a first optical path is defined, such that the excitation lens is configured to focus into the sample a light beam emitted from the at least one Raman excitation light source,
wherein the ATR crystal and the collection optics are positioned so that a second optical path is defined, such that the collection optics is configured to collect Raman scattered light emitted by the sample and to redirect said Raman scattered light to the at least one photodetector through the wavelength-dispersive device,
wherein a Raman subsystem is an off-axis system,
wherein the collection lens is configured to be movable along a direction parallel to the second optical path, and
wherein the excitation lens is configured to be movable along a direction parallel to the first optical path and/or in a direction transverse to the first optical path.