Six-wavelength on-site physical evidence laser detector

Abstract

The invention discloses a six-wavelength on-site physical evidence laser detector. The physical evidence laser detector is characterized in that the laser detector comprises two laser generation systems and a single laser output channel; in the two laser generation systems, one laser generation system comprises a first laser emission module, a first wavelength generation optical path, a second wavelength generation optical path and a third wavelength generation optical path, and the first wavelength generation optical path, the second wavelength generation optical path and the third wavelength generation optical path are arranged at the output side of the first laser emission module; the other laser generation system comprises a second laser emission module, a fourth wavelength generation optical path, a fifth wavelength generation optical path and a sixth wavelength generation optical path, and the fourth wavelength generation optical path, the fifth wavelength generation optical path and the sixth wavelength generation optical path are arranged at the output side of the second laser emission module. lasers outputted from the six wavelength generation optical paths are collected to a single laser output channel through a plurality of reflectors for output. Six-wavelength integration of main wave bands covering physical evidence detection is achieved, requirements of searchlighting with different traces and different wavelengths during the scene investigation process in the criminal science and technology are met furthest, and the provided laser detector has advantages of compact structure, stable performances, convenient operation, high conversion efficiency and the like.

Description

technical field [0001] The invention relates to a six-wavelength on-site physical evidence laser detector which utilizes optical frequency doubling and sum-frequency technology to realize covering the main laser wavelength bands required for on-site physical evidence detection and is applied to on-site physical evidence detection. Background technique [0002] In the process of effectively screening the personal biological sample information of criminal suspects, the public security department often regards the appearance and extraction of potential fingerprints as one of the most important links in finding litigation evidence. At present, there are many methods for revealing traces, which are mainly divided into three categories: physical methods, chemical methods and optical methods. The physical methods include 502 glue fumigation, powder brushing, iodine fumigation, physical developing solution, small particle suspension, vacuum metal coating and dye dyeing. The chemica...

AI Technical Summary

Problems solved by technology

[0005] 1. There are only four bands, covering a limited area;

[0006] 2. Each band can only be output from its own output channel, and cannot be output in the same output channel

Therefore, the operation process is complicated and cannot be practically applied in the field inspection

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