激光半主动比例导引头光学系统分析与设计

Analysis and design of optical system of laser semi-active proportional seeker

通过对激光半主动比例导引头工作原理和导引头光学系统的特点进行分析,并结合总体设计要求,提出设计一套波段为1.064μm,焦距38mm,瞬时视场±3°,线性区±1°的激光半主动比例导引头光学系统。用Zernike多项式模拟一个带有较大垂轴球差的波前,叠加在入射波面上,然后对系统进行优化,通过调整加入垂轴球差的大小来控制成像光斑的大小及光斑的均匀性,确定光斑直径为1.5mm。

According to the analysis of the working principle of laser semi‐active proportional seeker ,the characteristics of the optical system w ere summarized .Based on the overall design requests ,an optical system of laser semi‐active proportional seeker ,with 1 .064 μm waveband , 38 mm focal length ,± 3° instantaneous field of view (IFOV) and ± 1° linear zone ,was de‐signed .The wavefront with large lateral spherical aberrations was simulated by Zernike poly‐nomial and superposed on the incident w ave surface ,then the system w as optimized .By chan‐ging the lateral spherical aberrations ,the size and uniformity of image facula could be regula‐ted ,and the diameter of facula was determined as 1 .5 mm .