Design and Detection Calculation Model of Laser Photoelectric Detection Target With Array Lens and High-Power Line Laser

Abstract

Under the condition of low illumination, the traditional sky screen has low detection ability, which cannot meet the detection and test needs of dynamic projectile’s parameter in weapon field. In order to solve this problem, this paper proposes a design method of laser photoelectric detection target with array lens and high-power line laser, this method mainly uses the high-power line laser to form a fan-shaped laser light source with a certain thickness, and combines the fan-shaped laser light source plane and the receiving detection screen plane to form a laser detection screen. The array meso-lens is introduced to design the laser detection screen of receiving optical path with wide-angle. A high sensitivity array photodetector is used to capture the laser reflection information of projectile when it passes through the laser detection screen. According to the characteristics of the designed laser detection screen, this paper studies the calculation method of laser reflected energy of projectile, establishes the calculation model of laser reflection power of projectile and derives the signal-to-noise ratio calculation function of laser photoelectric detection target. Through the experimental test, the results show that compared with the traditional sky screen, the field of view of the designed laser photoelectric detection target is significantly increased, and the signal-to-noise ratio of the photoelectric detection is significantly higher than the traditional sky screen in low illumination environment.