Design of multi-channel sequential front light imaging system for transient condition
In order to obtain stable and high-quality sequential images under transient condition and differ-ent object distances,a four-channel sequential front light high-speed imaging system was designed.The system used image space parallel light splitting,taking the imaging principle as the starting point to analyze the key design elements of system.Based on the theoretical calculation parameters,the sub-lens groups(objective lens group,field mirror and collimating lens group,converging lens group)was designed and ab-errations were independently corrected.Adding field mirror to reduce the size and weight of system and im-prove light energy utilization.The transmission effect of beam was improved by accurate connection of field of view and pupil.On this basis,the sub lens groups were integrated and optimized,and beam split-ters were added to form the final four-channel sequential front light imaging system.The object distance ad-justable optical path was designed,and the image quality of system at the object distance of 0.5 m～∞ was guaranteed by adjusting the handwheel of objective lens group in use,while keeping the position of primary image plane unchanged,enhancing the stability of system performance stability and reducing the difficulty of installation and adjustment.The receiving part of system can be replaced according to actual needs,and the system can be expanded to eight-channel system after adding splitters in the beam splitting region.The installed and adjusted sequential front-light imaging system is used for laboratory testing and field tests,and main optical performance is good.the resolution of each channel can reach 72 lp/mm,and imaging con-sistency is greater than 98%.Field test results show that the optical system can meet the requirements for shooting sequence images under transient condition.
sequential front light imagingmulti-channeloptical designlens group connectionconsistency
万方数据
维普
