Slit diaphragm parameter enactment and analysis on photoelectric detection target

To solve the question that the structure of tradition photoelectric detection target is relatively complex and operation is discommodious ness, the paper discuss how to improve its detection system. The long rectangular photo detector that has high response and low noise was used to improve its detection performance, and designed rational slit diaphragm base on photo detector. Base on optics principle and the characteristic of photo detector, the slit diaphragm functions were analyzed, the leaving focus technology was applied to eliminate detection blind in detector, the slit parameter were calculated and discussed. Through the experimentation and analyze, the leaving focus distance between detector and slit is 5.4mm that is the best design value, which can improve the detection performance and enhance catch rate of projectile.