双DMD变焦红外双波段场景模拟器光学引擎设计
投稿时间:2017-11-01  修订日期:2018-03-04  点此下载全文
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作者单位E-mail
潘 越 长春理工大学 jilinpy@163.com 
徐熙平 长春理工大学  
乔 杨 长春理工大学  
基金项目:国家自然科学基金青年科学基金(61605016)资助项目
中文摘要:为仿真现实场景中目标和干扰的光谱分布差异,设计了一种基于双数字微镜器件(DMD,Digital Micromirror Device)的双通道、共口径、变焦光学引擎,包括投影光学系统和两套照明光学系统。光学引擎以红外中波和长波柯勒远心光路分别直接照明两DMD靶面,采用空间立体布局避免不同光路间干扰。设计结果表明:照明光学系统的照度均匀性优于94%;中波(3.7μm~4.8μm)和长波(8μm~12μm)内,变焦投影光学系统在10lp/mm处的调制传递函数(MTF,Modulation Transfer Function)值分别优于0.7和0.4;系统畸变小于0.5%,满足使用要求。
中文关键词:光学设计  红外仿真  双DMD  双波段  光学引擎
 
Design of optical engine for zoom infrared two-band simulator based on dual-DMD
Abstract:In order to simulate the spectral distribution difference between the target and the interference in real scene, a zoom optical engine with two channels and the same caliber has been designed based on dual digital micromirror device(DMD), it includes projection optical system and two illumination optical systems. The optical engine directly illuminates two DMD target surfaces respectively with long-wave infrared(LWIR) and mid-wave infrared(MWIR) Kohler telecentric beam. It uses spatial stereoscopic layout to get avoid of interference between different optical paths. The design result shows that the illuminance uniformity of illumination optical system is better than 94%. The modulation transfer function(MTF) values of zoom projection optical system are better than 0.4 and better than 0.7 at 101p/mm respectivly in bands of LWIR (8μm~12μm) and MWIR (3.7μm~4.8μm). And the distortion is better than 0.5, which meet the requirements.
keywords:optical design, infrared simulation, dual-DMD, two-band, optical engine
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