Changchun University of Science and Technology,Changchun University of Science and Technology,Changchun University of Science and Technology
In order to simulate the spectral distribution difference betw een the target and the interference in real scene, a zoom optical engine w ith tw o channels and the same caliber has been designed based on dual digital micro-mirror device ( DM D) , it includes projection optical system and tw o illumination optical systems. The optical engine directly illuminates tw o DM D target surfaces respectively w ith long-w ave infrared ( LWIR) and mid-w ave infrared ( M WIR) Kohler telecentric beam. It uses spatial stereoscopic layout to get avoid of interference betw een different optical paths. The design result show s that the illuminance uniformity of illumination optical system is better than 94%. The modulation transfer function ( M TF) values of zoom projection optical system are better than 0. 4 and better than 0. 7 at 101 p/mm respectively in bands of LWIR ( 8 ~ 12 μm) and M WIR ( 3. 7 ~ 4. 8 μm) . And the distortion is better than 0. 5%, w hich meet the requirements.
PAN Yue, XU Xi-Ping, QIAO Yang. Design of optical engine for zoom infrared two-band scene simulator based on dual-DMD[J]. Journal of Infrared and Millimeter Waves,2018,37(4):437~444Copy