A Raman spectrometer capable of automatic adjustment of the position of an objective table and having laser safety protective devices

Abstract

A novel Raman spectrometer is disclosed. The Raman spectrometer includes a rack, a laser generator, a controller, protective shields, a pressure sensor, an X-Y-Z three-axis movement platform, an objective lens and a high-speed camera. The objective table is mounted on the X-Y-Z three-axis movement platform. The pressure sensor is mounted at a position where the left and right protective shields are in contact. The X-Y-Z three-axis movement platform moves along the Z axis so as to drive the objective table to move up and down, the high-speed camera takes an image at the same time, and by combination with an image processing technique, the objective table is adjusted to a position where the image of an experiment sample is clearest, thus achieving automatic microscope focusing. Under a condition of not opening the protective shields, the e X-Y-Z three-axis movement platform drives the objective table to move left and right as well as forward and backward along the X and Y axes so that multi-point spectrum collection of the experiment sample is conveniently performed. If the protective shields are opened in a working process of the laser generator, the pressure sensor is released, then the laser generator is immediately turned off and an alarm is given.

Description

technical field [0001] The patent of the present invention relates to automatic control, automatic detection and alarm equipment, in particular to a Raman spectrometer with automatic adjustment of the position of the stage and a laser safety protection device. Background technique [0002] Raman spectroscopy is an important spectroscopic technique for studying the microstructure of substances. The Raman spectrometer is mainly used to determine and confirm the composition of substances, and can also be used in criminal investigation and jewelry industry for drug detection and gem identification. The Raman spectrometer uses a laser as the light source, which is harmful to the human body. When using the Raman spectrometer, it is necessary to wear protective glasses. And when measuring the sample spectrum, the same sample needs to be measured at multiple points. [0003] Existing Raman spectrometers lack light source leakage protection measures. If the protective cover is open...

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Problems solved by technology

[0003] Existing Raman spectrometers lack light source leakage protection measures. If the protective cover is opened when the light source is turned on, it will cause harm to the human body

Moreover, the spectrometer stage can only move in the horizontal direction, which is convenient for changing samples, but cannot move in space, which is not conducive to multi-point acquisition of sample spectra

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