Raman spectroscopy system and Raman spectroscopy measurement method

Abstract

The present invention relates to a Raman spectroscopic system for security screening, comprising: an inspection center arranged in a clean and temperature-controlled environment, including a single light source; an analysis device having a focal length sufficiently large to obtain said one or High-resolution Raman spectra of a plurality of detected objects; and one-stage or multi-stage beam splitters; and a plurality of detection terminals separated from the detection center, each detection terminal includes at least one Raman probe, wherein the Raman The probe guides the excitation light to multiple positions of a test object or to multiple test objects at different positions, and transmits the Raman scattered light back to the detection center, and when the beam splitter is multi-stage A power amplifier for amplifying the excitation light is arranged between the two polar beam splitters. The invention also relates to a method for measuring Raman spectra for security inspection.

Description

[0001] This application is a divisional case of the application with the same name submitted on June 27, 2008 with application number 200810115790.2. technical field [0002] The invention relates to a Raman spectroscopy system. The invention also relates to a method for measuring the Raman spectrum of the detected object by using the system. Background technique [0003] Scattering occurs when light hits a substance. When scattering occurs, the wavelength of most of the scattered light does not change, and this kind of scattering without changing wavelength is called Rayleigh scattering; the wavelength of a small part of scattered light will increase or decrease, and this kind of scattering with changing wavelength It is called Raman scattering, and its corresponding spectrum is called Raman spectrum. Raman spectroscopy belongs to the vibrational spectrum of molecules. Each substance has its own characteristic Raman spectrum, so Raman spectrum can be used as a "fingerpri...

AI Technical Summary

Problems solved by technology

In general, in order to improve the resolution, it is necessary to use a Raman spectrometer with a sufficiently large focal length. At this time, the volume of the entire system will inevitably increase, thus losing portability

In addition, some optical components in the Raman spectrometer are expensive, and have strict requirements on the cleanliness, temperature, and humidity of the environment, which affects the performance of the Raman spectrometer in safety inspection, environmental monitoring, chemical analysis, drug detection, Applications in food testing and other fields

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