Design of Combined Receiving Lens for Panoramic Laser Fuze Detection

At present, the coaxial laser system is widely used in the panoramic laser fuze receiving optical system. The lens used for the coaxial laser system have the problems that the length is too long, the volume is large, and the adjustment is difficult. combined lens with multiple plastic lenses are designed. The parallel light passes through the combined lens and is refracted by the photosensitive surface of the photodetector. It overcomes the paradox between the size, shape of the photosensitive surface and the sector field of view, achieves the design with large receiver aperture and large field of view receiver optics. Specific design examples are given, geometric model and optical simulation are performed. The simulation results show that the optical efficiency of the system with combined lens reaches 83.037%, and a strict 90° detection angle can be generated, and the feasibility of the design is verified. The research can provide a reference for a large detection angle with a small-sized optical receiving system.