Four-quadrant detector-based auxiliary system and method for atomic fluorescence hollow cathode lamp

Abstract

The invention provides a four-quadrant detector-based auxiliary system and a four-quadrant detector-based auxiliary method for an atomic fluorescence hollow cathode lamp. According to the auxiliary system, an auxiliary lens and a four-quadrant detector are arranged behind an observation point, so that light convergent at the observation point forms light spots on the four-quadrant detector after passing through the auxiliary lens. The four-quadrant detector is connected with a control system through a signal processing circuit. The control system is also connected with the hollow cathode lamp. The auxiliary system can be used for performing light path alignment and light source drift correction on the atomic fluorescence hollow cathode lamp. The system and the method are high in light path alignment accuracy and repeatability, can be used for automatically monitoring and correcting light source drift, and have broad application prospect in the technical field of atomic fluorescence analysis, in particular in the fields of automatic focusing and light source drift correction of the hollow cathode lamp, and the like.

Description

technical field [0001] The invention relates to the technical field of atomic fluorescence analysis, in particular to the technical field of optical path alignment and light source drift calibration of atomic fluorescence. Background technique [0002] In the atomic fluorescence analysis technique, the intensity and stability of the excitation light source directly determine the analytical sensitivity and repeatability of the atomic fluorescence spectrometer. The higher the intensity of the excitation light source, the higher the analysis sensitivity; the better the stability of the excitation light source, the better the analysis repeatability. [0003] Hollow cathode lamps have the advantages of convenient operation, high sensitivity, low cost, and pulse modulation, and are currently widely used excitation light sources for atomic fluorescence. [0004] As an excitation light source for atomic fluorescence, the spot position of the hollow cathode lamp after lens imaging d...

AI Technical Summary

Problems solved by technology

However, before the light radiated by the light source passes through the lens, the design of the device to directly irradiate a small part of the light onto the light source detector or guide it to the light source detector through the optical fiber will lose part of the light energy, which affects the analysis to a certain extent. At the same time, the design of optical fiber or light source detector on the optical system will seriously affect the normal focusing and imaging of the light source at the observation point above the atomizer, thereby affecting the normal generation of atomic fluorescence. In addition, this device cannot be used for hollow cathode lighting at the same time Alignment of the road

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