Raman spectrometer for detecting specific narrow wave number range

Abstract

The invention relates to a raman spectrometer for detecting a specific narrow wave number range. The raman spectrometer comprises laser transmitting equipment, spectrum collection equipment and data processing equipment, wherein the laser transmitting equipment is used for obtaining a power regulated exciting light beam; the spectrum collection equipment is used for lighting the power regulated exciting light beam to the surface of a sample to perform raman scattering, filtering off oriented rayleigh scattered light to obtain oriented raman scattered light, and allowing the oriented raman scattered light to be received by a receiver; the data processing equipment is computer equipment connected with the receiver, and is used for formation, analysis and judgment of an obtained raman spectrum; the receiver is a single photon detector; and the oriented raman scattered light is finally received by the single photon detector. Compared with the prior art, the raman spectrometer can realize high-efficiency utilization of a photon, and can realize rapid and high-sensitivity detection of the raman spectrum of the specific narrow wave number range.

Description

technical field [0001] The invention relates to a Raman spectrometer, in particular to a Raman spectrometer for detecting a specific narrow wavenumber range. Background technique [0002] At present, the Raman spectrometers used in the market, including scientific research and portable, are generally aimed at a wider range of wavenumbers to obtain richer spectral information. In this way, the emitted laser light is uniformly dispersed, and only one photon in every ten million photons undergoes Raman scattering, which makes the Raman signal itself weaker, resulting in a lower signal-to-noise ratio of the spectrum in the measurement range. In order to obtain a high-precision Raman spectrum, a higher laser intensity and a longer acquisition time are required, which is likely to cause damage to samples, especially biological samples, and a higher time cost. [0003] Therefore, for Raman applications with selected marker peaks, narrowing the detection range to spectral signal co...

AI Technical Summary

Problems solved by technology

In this way, the emitted laser light is uniformly dispersed, and only one photon in every ten million photons undergoes Raman scattering, which makes the Raman signal itself weaker, resulting in a lower signal-to-noise ratio of the spectrum in the measurement range.

In order to obtain high-precision Raman spectra, higher laser intensity and longer acquisition time are required, which is likely to cause damage to samples, especially biological samples, and a higher time cost

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