Study On Emitting And Receiving Optical Systems Of Lidar

Lidar has the characteristics of high resolution, high anti-jaming ability and it can be used to get three-dimensional image. So lidar has found a lot of applications in military equipments. It can be used for distance measuring, precision tracking, orientation, guiding, fuze sensing, meteorologic measure, underwater communication and detecting. With the steady improvement of high power output, better beam quality of semiconductor lasers and the progress of detector's performance, semiconductor lasers active imaging lidar has emerged as the times require and has becoming a newly important investigation domain in international.The emitting and receiving optical system of the semiconductor lasers imaging lidar was studied in this paper, which is one of the most important part of lidar. Analyzed the mode of semiconductor lasers on the basis of electromagnetic theory. Studied the far-field pattern of semiconductor lasers beam. According to the character of semiconductor lasers beam' s far-field pattern, several emitting optical systems were designed and the performance of them was evaluated by means of ZEMAX optical designing software. The situation of each one is suit for was discussed. Designed receiving optical and mechanism system, also it' s performance was evaluated. Finally, some experiments were did with the emitting and receiving systems that had been designed. The experimentation proved that the theory and conclusion of the design is correct.In this paper, beam properties of semiconductor lasers were analyzed carefully. Proposed a novelty and practical method for the collimation of high power, big emitting area semiconductor lasers. The receiving system has the characteristics of low cost and simple configuration. In conclusion the emitting and receiving optical system can satisfied the demands of semiconductor lasers imaging lidar in some extent.