Detection Sensitivity Calculation Model and Photoelectric Detection Performance Analysis on Laser Light Screens

To improve the detection sensitivity of laser light screens, this paper puts forward a new method to design the photoelectric detection system of laser light screens, uses the high responsive photoelectric detectors and the high light infrared line lasers to design four laser light screens measurement system, sets up the detection sensitivity calculation model of laser light screens by utilizing flight target's size and laser detection screen's geometry construction, uses array across infrared line lasers to form line emission source and gives the method of eliminating the detection blind zones, and establishes the light energy distribution calculation model of laser light screen and the SNR calculation model based on the photoelectric detectors inherent noise and target's optical characteristic. Through calculation and analysis, the results show that the SNR of laser light screen can reach 16 and the detection sensitivity can reach 1200; the experiment results show that the analog signal amplitude output in laser detection screen is three times higher than that in the traditional.