Design of solid-state array laser radar receiving optical system

With regards to the safety of solid-state area array lidars, in order to improve the energy uniformity of imaging plane and increase the energy received by the optical system, this paper works to ensure a low signal-to-noise ratio and the detectability of a target. The optical parameters are given by modeling the emitted and received laser energy. The factors affecting the image plane's illumination in the optical receiver are studied and the design elements of optical systems with large fields of view, large relative aperture, and high illumination uniformity are described. Through ZEMAX optimization analysis, a detailed implementation process is then provided. A lidar receiving lens with λ = 905 (±5) nm, a focal length of 15 mm, a relative aperture of 1/1.4, and a field of view 2ω = 76° was designed. The total system length was less than 77 mm, and the MTF value at the spatial frequency of 20 lp/mm was greater than 0.5. The relative distortion at the 0.85 field of view was less than 8% and the unevenness of the image plane illumination was less than 7.2%.This design meets the requirements for lidar detection.