Raman spectrometer

Abstract

The invention relates to a raman spectrometer, which can be used for accurately qualitatively and half quantitatively analyzing a sample. The raman spectrometer comprises a laser, a raman signal acquisition device, a transmittance-type grating spectrometer, a plasma filter plate, a laser attenuation plate and a soleplate, wherein all the parts are fixed on the soleplate. The laser, the raman signal acquisition device and the transmittance-type grating spectrometer are fixed on a floor, and the raman spectrometer adopts transmittance-type coaxial optical-path design, so that the confocal measurement can be realized. The raman spectrometer has advantages of high light throughput, good spectral resolution, good stability and the like. The raman spectrometer is applicable to various excitation light sources of ultraviolet light, visible light, near-infrared light and the like.

Description

technical field [0001] The invention relates to a Raman spectrometer. As an analysis instrument, the composition of a substance can be analyzed by collecting the Raman spectrum of a sample. Background technique [0002] Raman spectroscopy, known as molecular fingerprinting, allows fast and accurate analysis of samples. Raman spectroscopy has a wide range of applications and can be used in food, security, physical evidence, minerals, environment, chemistry, materials, biology, oceans and other fields. Sample types include solid, powder, liquid, gas, interface, colloid and other forms. At present, the importance of Raman spectroscopy is gradually being recognized by everyone, and its application is becoming more and more extensive. [0003] The principle of Raman spectroscopy is: a photon interacts with a molecule. If the energy of the molecule absorbing the photon transitions from a low energy level in a vibration or rotational state to a high energy level, then according t...

AI Technical Summary

Problems solved by technology

However, the three-grating Raman spectrometer also has the disadvantages of large size, low Raman signal transmission efficiency, and difficulty in debugging and maintenance.

The second is the confocal Raman spectrometer used in the laboratory. It uses a microscope to collect Raman signals and uses filters to filter out the interference of stray light. It can achieve confocal measurement. It has the advantages of small size, high acquisition and transmission efficiency, etc. However, the microscope used for collection is large in size and high in cost, and the confocal Raman spectrometer is heavy in weight, has high requirements on the environment, and is inconvenient to carry

However, the optical fiber transmission efficiency is low, it is not suitable for the ultraviolet band, and the confocal function cannot be realized

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