直线运动动态目标发生器光学系统设计  

Optical system design for dynamic linear-motion-target generator

作　　者：刘旭 尹晶 刘玉桥 王强 胡雪莹 LIU Xu;YIN Jing;LIU Yuqiao;WANG Qiang;HU Xueying(College of Electronic Engineering,Changchun College of Electronic Technology,Changchun 130022,China)

机构地区：[1]长春电子科技学院电子工程学院,长春130022

出　　处：《光学技术》2022年第6期664-667,678,共5页Optical Technique

摘　　要：直线运动动态目标发生器用于检测与标定光电跟瞄吊舱的动态分辨率、跟踪带宽等性能指标。动态目标发生器内置平行光管用于模拟无限远动态目标,动态图形置于光管的焦平面并做变速直线运动模拟地面景物的移动动态。发生器内的平行光管由于其长焦距、大口径、大视场的特点,其二级光谱需重点考虑,基于复消色差理论,矫正二级光谱并平衡场曲等其余像差。设计了1m焦距、口径100mm、视场角为5°的大视场、长焦距无限远目标模拟光学准直系统。设计结果表明,光学系统的传递函数优于0.3@100lp/mm,畸变≤0.03%,沿轴色差远小于焦深,有效地矫正了二级光谱。采用分辨率板法检测光学系统的轴上、轴外点的空间分辨率,检测结果表明光管的空间分辨率均达到20组152lp/mm,满足系统要求。Dynamic linear-motion-target generator is used to detect or calibrate performance indexes such as dynamic resolution or tracking bandwidth of electro-optical tracking and pointing system.A collimator is placed inside the dynamic target generator to simulate the infinite dynamic target,motion graphics are placed at the focal plane of thecollimatorand moves in a variable speed linear motion to simulatethe movement dynamics of the ground scene.Due to the characteristics of long focal length,large aperture and large field of view of the generator’s collimator,the secondary spectrum of the collimator needs to be considered,based ontheory ofchromatic aberration eliminationthe secondary spectrum is corrected and other aberrations such as field curvature are balanced.An optical collimating systemwith focal length of 1 m and field of view angle of 5° is designed.The design results show that the MTF is better than 0.3@100 lp/mm,the distortion is 0.03%,and axial chromatic aberrationis much less than the focal depth,which effectively corrects secondary spectrum.The on-axis and off-axis spatial resolution of the optical systemis detected by the resolution plate method,the detection results show thatspatial resolution of the collimatorreaches 152 lp/mm,which meets the requirements of the system.

关 键 词：动态目标模拟 平行光管 复消色差 长焦距 光学系统设计 

分 类 号：TH741[机械工程—光学工程]