The Performance Of The Non-scanning Pulse Of The Optical System Of The Laser Radar

The scannerless laser radar has become more and more important due to its characteristics of compact structure, high-resolution, and high-frame imaging rate. It has become the developmental direction of laser radar. Scannerless laser radar conventionally uses the method of floodlighting. The light distribution on target is not uniformity and the energy availability factor is low. Aiming to increasing the utilization efficiency, the purpose is to study the performance of the optical system of scannerless laser radar in theory, to find a new and more suitable optical system, and to simulate it with the help of ZEMAX.The optical system of scannerless laser radar is analyzed firstly in the paper. Under the condition of the certain laser parameters, the optical system based on APD array as detector is designed. In the part of transmitting optical system, in order to increase the operating distance, a beam expander telescope which is used for reducing divergent angle of laser beam is chosen. To make fully use of light, a new method that micro lens array is chosen as beam splitter is researched. In the part of receiving optical system, in order to improve the filling factor of APD array, an idea that micro lens array is used to replace the previous usual lens is studied. In the dissertation, a new optical system is designed and simulated. The simulation shows that the density of the light spot after split was uniform, and array illumination is feasible. In the part of receiving optical system, the beamsize of the light spot through micro lens array can match perfectly with the APD unit cell, and the receiving efficiency is improved effectively.