Space panoramic laser differential confocal Raman spectrum imaging detection method and device

Abstract

The invention relates to a space panoramic laser differential confocal Raman spectrum imaging detection method and device, and belongs to the technical field of space optical imaging and spectral measurement. A focusing telescope technology, a differential confocal technology, an image obtaining technology and a panoramic scanning technology are introduced into the spectral detection; a dichroic beam splitting system is used; Rayleigh scattering light and Raman scattering light are subjected to nondestructive separation; the characteristic that the detector differential confocal response curvezero crossing point and focal position are precisely corresponded is utilized; the telescope system is precisely controlled to automatically regulate the focus by finding the response zero crossing point, so that the laser light beam is automatically focused to a tested object; the device realizes space automatic focusing spectrum detection and image obtaining; through the panoramic scanning technology, the full circumferential space spectrum detection is realized; the method and device capable of realizing the sample space automatic focusing spectrum and image detection are formed. The method and the device have the advantages that the automatic focusing is realized; the positioning is accurate; the large-space range is realized; the full panoramic field is realized; the spectrum detection sensitivity is high; the target image is obtained, and the like.

Description

technical field [0001] The invention relates to the technical field of spatial optical imaging and spectral measurement, in particular to a detection method and device for spatial peripheral laser differential confocal Raman spectral imaging. Background technique [0002] Laser confocal Raman spectroscopy testing technology is a new technology that combines spatial imaging technology and Raman spectroscopy analysis technology. In the case of interference from surrounding substances, the structure and composition of the material components of the photographed sample can be obtained, providing better molecular "fingerprint" features. It can not only observe the Raman spectrum signals of different micro-regions in the same layer of the sample, but also observe the Raman signals of different layers of the sample space depth, and perform spatial scanning on the sample to be tested, so as to achieve the goal of carrying out the test without damaging the sample. The effect of map ...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a space-view laser differential confocal Raman spectroscopy imaging detection method and device, which solves the problem of limiting the ability of the confocal Raman spectroscopy system to detect space substances and restricts the confocal Issues for Further Development of Raman Spectroscopy

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