Non-dispersive narrow-band sharp-line light source system for mercury vapor analyzer and implementation method thereof

Abstract

The application discloses a non-dispersive narrow-band sharp-line light source system for a mercury vapor analyzer and an implementation method, belongs to the field of optical systems, and solves the problems of no wavelength selectivity stability control, easy light intensity drift and complex structure of a traditional light source driving circuit, and comprises an optical path structure and a light stability control system, wherein the light stability control system comprises a master control module, a phase-shift full-bridge light source driving module, a feedback reference light sampling module, a sample light sampling module and a driving boost power supply module, the optical path adopts double optical path equal-height light taking, and is matched with a same-parameter narrow-band filter; the method realizes the continuous dynamic compensation of light intensity fluctuation through power preheating, high-speed reference light acquisition, PID operation conversion of phase-shift parameters, dynamic adjustment of driving power, high-precision sample light acquisition and analysis. The application has the advantages of compact structure, low cost, high light intensity stability, good detection signal-to-noise ratio and strong universality, is beneficial to the miniaturization of the analyzer, and is suitable for the high-precision detection requirements of various gas discharge lamps.

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