Optical System Design Of Laser Range Finder Based On ZEMAX

Recently,the application of laser range finder telescope is more and more widely,especially in the field of outdoor sports.There are many relatively mature products on abroad,which are compact,hand-held operation with high accuracy.As compared with the foreign laser range finder telescope,the domestic laser range finder telescope has a long way to go in miniaturization,lightweight and ranging accuracy.So research on laser range telescope system has good prospects.The main work of this thesis as follows:1.Using the equations of basic wavefront aberration theory to solve the lens initial structure for achromatic objective.To realize the miniaturization and light weight of the laser range finder,an optical system of receiving part shared with telescope part was designed.By multiple structure optimization based on Zemax,We get a designed laser range finder telescope which satisfies not only the requirements of the performance of telescope part but also the receiving part.The telescope optical system targets are: 6?magnification,objective lens with 82.5mm focal length and with 6 degree FOV,22 mm entrance pupil diameter,exit pupil distance greater than17 mm,and the optical total track within 90 mm,second order spectrum of the optical system satisfied the design requirements.2.According to the design parameters of laser range finder imaging system,the required semiconductor lasers and receiving detector were selected.The pupil diameter D?focal length f?numerical aperture NA of the transmitting system;and the pupil diameter D?focal length f?field of view(FOV)of the receiving system had been further confirmed.In order to improve the range scope and range accuracy,design of semiconductor laser collimation had been done,so as the image quality evaluation and performance analysis of the laser transmitting system and receiving system.3.Considering the processing and adjustable of the laser ranging telescope,tolerance analysis of the laser transmitting system and receiving system had been done,and the required image quality was achieved within the reasonable tolerancerange.4.Ray tracing of the laser transmitting system was obtained by using Tracepro optical simulation software,causes of stray light of transmitting system were analysized,and the elimination of stray light had also been done in the subsequent analysis.