Radiation energy stabilizing device and method applied to element lamp

Abstract

The invention relates to a radiation energy stabilizing device and method applied to an element lamp. The radiation energy stabilizing device comprises: a controller; a light source energy sampling device; a low-noise pre-amplification module used for amplifying the current signal; a root mean square value conversion module; a low noise ratio module; and a high-proportion difference amplification module respectively connected with the low-noise proportion module, the controller and the correction selection module and used for locking the radiation energy of the light source at a set value in real time. The radiation energy stabilizing method comprises the following steps: sampling an optical signal; amplifying the current signal; performing root mean square value conversion on the signal; amplifying or attenuating the signal; and locking the radiation energy of the light source at a preset value in real time. According to the technical scheme, rapid and automatic adjustment of radiation light source energy is achieved, and correction errors caused by light source differences or environment differences in a traditional mode are overcome. The light source energy sampling device is convenient to install, does not need to be adjusted, and can ensure constant and stable energy output of the light source.

Description

technical field [0001] The invention relates to the field of analytical chemistry, and mainly relates to a radiation energy stabilizing device and a stabilizing method applied to an element lamp. Background technique [0002] All light sources drift, which will directly affect the analysis and measurement results. Most of the current light source stabilization technologies use the introduction of reference beams, the addition of proportional mirrors, or the use of software algorithms to suppress drift. These methods have the following disadvantages: [0003] 1. Add a proportional mirror in the optical path to reflect a part of the light from the light source to a specific detector, and correct the light source through the change of the detected reflected light. This method loses the energy of the light source, especially when using the light source In a spectroscopic instrument as an excitation source, energy attenuation directly affects the stability and sensitivity of the...

AI Technical Summary

Problems solved by technology

[0003] 1. Add a proportional mirror in the optical path to reflect a part of the light from the light source to a specific detector, and correct the light source through the change of the detected reflected light. This method loses the energy of the light source, especially when using the light source In a spectroscopic instrument as an excitation source, energy attenuation directly affects the stability and sensitivity of the instrument, which in turn affects the measurement performance of the whole machine;

[0004] 2. Introduce the reference method, add a light cutter on the optical path, and use the double beam function to realize the drift correction of the light source. This method has a complex structure and is only suitable for pulse-powered (non-continuous) light sources, not for continuous light source;

However, due to the different ambient temperature and the required light source intensity, there are great differences in this correction method, and it is prone to over-correction or under-correction.

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