An automatic control system for core components of a mass spectrometer

Abstract

The invention discloses an optical system for automatically controlling the size of the laser analysis mode spot of a mass spectrometer, which is composed of an incident lens, a reflection mirror with a central transmission hole, a relay lens, a correction reflection mirror and a photoelectric detector. The incident lens, the mirror with the central transmission hole, the relay lens and the correction mirror are arranged sequentially in space, the mirror with the central transmission hole is placed at 45 degrees to the optical axis of the incident laser light, and the photodetector is placed at the center of the incident laser light The vertical direction of the axis. According to the laser power received by the photodetector, the laser spot size of the incident laser beam incident on the correction mirror is determined. By moving the relay lens and changing the distance between the relay lens and the correction mirror, the size of the laser spot incident on the correction mirror is dynamically adjusted. The invention provides an automatic control optical system capable of dynamically controlling the size of the analytical laser spot. By controlling the size of the laser analytical spot, the requirements of the mass spectrometer under different test conditions are met, and the working performance of the mass spectrometer is enhanced.

Description

technical field [0001] The invention relates to an optical system for controlling a laser spot, in particular to an optical system for automatic control of a laser analysis spot of a mass spectrometer. Background technique [0002] As a high-end analytical instrument, mass spectrometer has extremely important application value in the fields of biomedicine and material analysis. Mass spectrometers based on laser desorption ion sources mainly use short-wavelength ultraviolet pulse lasers as laser sources for ion desorption. [0003] At present, the production and research of protein flight mass spectrometers used for the prevention and detection of human diseases often use a nitrogen laser with a wavelength of 337nm as the analytical laser source. Due to the beam quality of the nitrogen laser, the laser spot size is relatively large when the mass spectrometer is working, and precise spot size control is actually difficult to achieve. [0004] With the development of all-soli...

AI Technical Summary

Problems solved by technology

[0006] However, the conventional mass spectrometer laser optical focusing system can only transform the laser beam into a specific laser spot size, and it is difficult to dynamically control the actual laser spot size according to the needs of use, making it difficult to adapt to the needs of different application targets

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