Spatial off-axis confocal Raman detection probe

Abstract

The invention discloses a spatial off-axis confocal Raman detection probe. The spatial off-axis confocal Raman detection probe comprises launching optical fibers, receiving optical fibers, a collimating lens, a filter wafer, a focusing lens, an encapsulating shell and the like, wherein a launching optical path and a receiving optical path are parallel to an optical axis (not positioned on the optical axis of the focusing lens) of the focusing lens and are distributed surrounding the optical axis of the focusing lens; optical paths of one or more paths of launching optical fibers pass through the focusing lens and are focused on a detected object (the detected object is located on a focal plane of the focusing lens); a Raman signal of the detected object is received by one or more paths of receiving optical fibers at a certain angle through the focusing lens and the collimating lens and enter a spectrometer for measurement. According to the spatial off-axis confocal Raman detection probe disclosed by the invention, the fluorescence intensity of a detected object container such as glass can be obviously eliminated; the spatial off-axis confocal Raman detection probe has the advantages of simple structure, low cost, convenient assembly and the like.

Description

technical field [0001] The invention relates to the technical field of optical detection, in particular to a spatial off-axis confocal Raman detection probe. It is mainly used in the Raman spectroscopy detection of bottled solid and liquid substances. Background technique [0002] The Raman scattering phenomenon was discovered by the Indian scientist Raman in 1928: when light is incident on a molecule, except for the frequency ω of the incident light 0 In addition to the same scattered light, there is also a frequency component ω 0 ±ω M The scattered light, ω M is the frequency associated with molecular rotation or vibration. Since then, the study of Raman scattering has made great progress. Since the advent of laser technology in the 1960s, this strong monochromatic light source has been applied to the study of Raman light scattering, and laser Raman spectroscopy has developed rapidly since then. [0003] Raman spectroscopy has the advantages of simplicity, quickness,...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the fluorescent background that occurs during Raman spectrum detection of glass bottled samples, overcomes the shortcomings of existing measurement technology devices such as complicated devices and complex algorithms, and proposes a spatial off-axis confocal Raman detection probe, which is used for Raman spectrum detection It can effectively eliminate the fluorescence background interference of the sample container, and has the advantages of simple structure, low cost, and convenient assembly.

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