According to the technical requirements of the high resolution TV seeker, the system 's optics parameters were calculated and the zoom configuration was optimized.F number of the optical system was defined.An optical zoom system with focal length of 40 mm ~ 152 mm and the F number of 3.5 was designed.The design results show that throughout the zoom process the values of the MTF at 106 lp/mm reach or close to 0.4, the image plane is stable and the image quality is good.%依据高分辨率电视图像导引头瞬时视场和作用距离的要求,结合选定相机的光敏面尺寸等,计算并确定了光学系统的焦距范围,根据光学系统分辨率以及结构尺寸等要求,确定了光学系统的F数,选择机械补偿法、负组补偿的变焦结构,给出焦距分配过程,最后,给出了焦距为40 mm～152 mm、F数为3.5的连续变焦光学系统的设计结果.设计结果表明:在整个变焦过程中,光学系统的传递函数值在106 lp/mm处达到或接近0.4,像面稳定,像质良好.
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