机载角反射器阵列设计

Airborne cube corner retro-reflector array

低轨目标目前流行的类半球状布阵方式的远程角偏小,测距盲区较大。对角锥棱镜进行研究分析,依据角反射器光束入射角度允许变化范围,合理分布角反射器,设计了一机载激光反射器装置,外形尺寸为119mm×88.8mm,共有15个角锥棱镜,底面切割成正六边形,底面边长为15.5mm,底面对边距为26.87mm,有效通光口径为25mm,高为19mm。考虑到角反射器的速差效应及其补偿要求,角锥棱镜最大角误差为5″,面形最大误差为5″。通过合理设计,比较单层角反射器,增加了入射光允许的角度范围,大大减小了低轨目标的测试盲区。

Dome-like structure are extensively used in low-orbit target and it has the disadvantages of small remote angle and large blind zone.Based on the research of the cube corner prism and the allowable variation range of incident angle,we designed a airborne laser retro-reflector device with a dimension of 119 mm×88.8 mm,composing of 15 cube corner prisms.The undersurface of the cube corner retro-reflector was cut into regular hexagon with 15.5 mm side length and 26.87 mm distance of opposite edges.The clear aperture and the height of the cube corner are 25 mm and 19 mm respectively.Considering the effect of speed difference and compensation requirements,the designed maximum angle error of cube corner retro-reflector was 5″,and the maximum error of surface profile was 5″.Compared with the single-layer corner reflectors,the allowable range of incident angles was increased and the blind zone of low-orbit target was reduces significantly.