Spatial heterodyne Raman spectrometer system

Abstract

The invention relates to a spatial heterodyne Raman spectrometer system, aiming at solving the problem that a traditional dispersion type Raman spectrometer is difficult to carry out high-precision, high-sensitivity and high-luminous flux detection analysis. The spatial heterodyne Raman spectrometer system comprises an excitation light source, a Raman probe and a spatial heterodyne Raman spectrometer, wherein excitation light emitted by the excitation light source is transmitted to the Raman probe through an optical fiber, the Raman probe converges the excitation light to a detected sample and collects excited Raman scattering light, and then the collected Raman scattering light is emitted to the spatial heterodyne Raman spectrometer through the optical fiber; and the spatial heterodyne Raman spectrometer comprises a front collimating lens, a spatial heterodyne interferometer, a fringe imaging lens and a detector, and Raman scattering light emitted by the optical fiber sequentially passes through the front collimating lens, the spatial heterodyne interferometer and the fringe imaging lens to form interference fringes on a target surface of the detector. The spectrometer can obtain an interference pattern with good modulation degree in a working wave band, and can meet the precision requirement of spectrum inversion.

Description

technical field [0001] The invention relates to the field of Raman spectrum measurement and analysis, in particular to a spatial heterodyne Raman spectrometer system. Background technique [0002] Raman spectroscopy has the characteristics of simplicity, rapidity, clear and sharp characteristic peaks, good reproducibility, and no need for sample preparation. The laser is used to irradiate the tissue to generate Raman scattered light with a frequency different from that of the incident light. Molecules are obtained by analyzing the Raman scattered light. Information about rotation and vibration. Since the Raman spectrum of different molecules has different spectral line characteristics, it can be used as a fingerprint spectrum for molecular identification. [0003] Traditional Raman spectrometers are mostly dispersive spectrometers, which require very small slits to improve spectral resolution, which limits the light flux entering the spectrometer, and the improvement of spe...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the traditional dispersive Raman spectrometer is difficult to perform detection and analysis with high precision, high sensitivity and high luminous flux, and to provide a spatial heterodyne Raman spectrometer system

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