Detection apparatus for contraband based on Raman spectral analysis technique

Abstract

The invention relates to a detection apparatus for contraband based on the Raman spectral analysis technique. The detection apparatus comprises a laser, an optical probe, a micro-spectrometer and a data acquisition and analysis processing system; the optical probe is a box which has a light inlet hole, a light outlet hole and a detection end, and a reflector, a dichroic beam combiner, condenser lenses and a long wave pass filter are provided in the box; laser light emitted by the laser is reflected by the reflector and the dichroic beam combiner after entering from the light inlet hole and then enters into a detection object arranged on the detection end after transmitted by one condenser lens, stimulated radiant light emitted by the detection object is transmitted by the condenser lens and the dichroic beam combiner, and light beams passing through the filter are focused by another condenser lens and enter into an interface terminal of the micro-spectrometer through the light outlet hole. Optical paths of the detection apparatus for contraband in the invention are simply arranged and have high efficiency and small loss; the detection apparatus is applicable to detection objects of various sizes and forms and has the advantages of low cost, strong resistance to interference, good stability, a small volume and convenient usage.

Description

technical field [0001] The invention relates to the technical field of spectral analysis, in particular to a contraband detection device applied in the security inspection field. Background technique [0002] The proliferation of drugs not only endangers human health, but also destroys the country's social tranquility and economic development, and has become a serious international public hazard. In February 1991, the United Nations' first special meeting on drug control pointed out that from the perspective of social and economic development, its harm is greater than AIDS and desertification, "the world's drug trafficking and drug use have become a major threat to all of us and a growing threat to international peace and security. question". Terrorist bombings on planes have claimed the lives of more than 2,000 people since 1969. The liquid explosives that have appeared in recent years are easy to disguise and carry, and have huge explosive power. To blow through the fuse...

AI Technical Summary

Problems solved by technology

However, for public places with dense crowds, some detection devices cannot adapt to detection targets of different shapes and sizes to obtain fast detection results; use

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