Radiation brightness compensation type heat radiation infrared light source system and method

Abstract

The invention discloses a radiation brightness compensation type heat radiation infrared light source system and method. According to the radiation brightness compensation type heat radiation infrared light source system and method, an adjustment optical path contains an output optical path and a measurement optical path; infrared radiation emitted by a ceramic heat emitting body is adjusted to be parallel output radiation through the output optical path, at the same time, the measurement optical path is ingeniously designed in the output optical path, so that the output radiation brightness of the light source can be measured synchronously; and a compensation controller timely adjusts the output current of a current-stabilized power source according to the measurement value of the output radiation brightness so as to realize closed-loop control on the radiation brightness of the heat emitting body, thereby making the output radiation brightness of the infrared light source have good stability and anti-jamming performance.

Description

technical field [0001] The invention relates to a thermal radiation infrared light source system and method with radiance compensation control, which are applied to the fields of optics, infrared detection, radiance measurement and the like. Background technique [0002] Thermal radiation infrared light source is a non-illumination light source whose main purpose is to generate infrared radiation. It is often used in the fields of infrared spectral reflectance and transmittance measurement, film thickness detection, and non-contact radiation heating technology; the spectral radiation output of infrared light source Stability is the fundamental guarantee for the above-mentioned measurement or detection techniques to obtain good accuracy and repeatability. [0003] High-temperature ceramic materials such as silicon carbide and silicon nitride can approximate black body radiation in the wavelength range of 2-20 μm after being energized and heated, and have high radiation effici...

AI Technical Summary

Problems solved by technology

However, affected by the oxidation phenomenon on the surface of the heating element, the spectral emissivity of the surface of the heating element changes accordingly, which will inevitably lead to changes in the spectral radiance output by the light source; in addition, with the prolongation of the working time, the aging of the ceramic heating element is inevitable. , resulting in a change in the spectral radiance output of the infrared light source

It can be seen that even when the precision steady-current power supply can output a constant current, the traditional thermal radiation infrared light source under open-loop control is affected by the change of the surface emissivity of the ceramic heating element and its own aging phenomenon, and the stability of its spectral radiance is difficult to guarantee.

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