Dual-wavelength laser Raman spectrometer

Abstract

The invention provides a dual-wavelength laser Raman spectrometer. The dual-wavelength laser Raman spectrometer comprises a dual-grating spectrometer, a laser emitting and collecting device and a controller. The double-grating spectrometer comprises a double-grating table, a first optical element and a detector. The laser emitting and collecting device comprises a dual-wavelength laser module anda dual-optical filter group. The dual-wavelength laser module is used for emitting first-wavelength laser or second-wavelength laser. The double-grating table comprises two gratings which are in one-to-one correspondence with the first wavelength laser and the second wavelength laser respectively. The double-optical-filter group comprises two optical filter groups which are in one-to-one correspondence with the first wavelength laser and the second wavelength laser respectively. The controller is respectively connected with the dual-grating table, the dual-wavelength laser module and the optical filter group. According to the invention, dual-wavelength automatic switching measurement can be effectively realized, the detection efficiency, the coupling efficiency, the core performance and the application range are improved, the hardware cost is controlled, and the economic benefit of the application field is improved.

Description

technical field [0001] The invention relates to the technical field of Raman spectroscopy, in particular to a dual-wavelength laser Raman spectrometer. Background technique [0002] With the deepening of research on the application of laser Raman technology, as well as the continuous development of laser technology and CCD technology, the performance of portable Raman spectrometers has been continuously improved, and the application range has become wider and wider. Due to the variety of detection objects in practical applications, many samples have specific selectivity for excitation wavelengths, and some samples have strong fluorescence characteristics, which makes traditional single-wavelength portable Raman spectrometers more difficult in practical applications. Due to the large limitations, sometimes two or more instruments must be prepared, which not only doubles the cost, but also troubles the application. [0003] Considering that in most cases, two wavelengths can ...

AI Technical Summary

Problems solved by technology

In essence, this technical solution simply integrates two traditional single-channel Raman spectrometers. In theory, it can also be increased to three or four channels. However, in terms of hardware cost, each additional channel will cost at least a corresponding increase. double

Moreover, there is a problem of low coupling efficiency in the optical fiber transmission path. Compared with the spatial optical path, the coupling efficiency of the system will be lower by more than 50%.

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