光子学报, 2005, 34 (7): 1078, 网络出版: 2006-06-12
红外热成像鱼眼镜头设计中若干特殊问题的处理
Some Key Problems about the Design of IR Thermal Imaging Fish-eye Lens
热成像鱼眼镜头 光阑球差 像差渐晕 Aitkin插值 全域优化 IR thermal imaging fish-eye lens Stop spherical aberration Aberration vignetting Aitkin interpolation Global optimization
摘要
提出鱼眼镜头光阑球差的级数表达式及其基于有限差分的近似计算方法,解决了通常的光阑倒追方法面临的难题;讨论孔径光阑与入瞳的特殊"共轭"关系,分析了光阑彗差和像差渐晕;运用Aitkin插值技术填补"溢出"光线在像面上的落点,以保证像质函数定义的一致性,维持自动优化持续进展,从而克服频繁的光线"溢出"造成的严重困难;提出充分利用像差渐晕改善像面照度均匀性的方法;论述标定轴外光束边界的逐次渐近过程和运用入瞳距离变量实现孔径光阑位置全域优化的技术.
Abstract
The series formula and its corresponding differential equation of fish-eye lens′ stop spherical aberration have been brought forward. Calculating the approximation of the stop spherical aberration according to these formulas,and then adopting iteration, we can confirm the entrance pupil′s position and primary ray accurately. Furthermore,it analyzes the stop′s coma,discusses the special “conjugate” relation between aperture stop and entrance pupil, and how to improve the uniformity of image plane illuminance by using aberration vignetting.Ray′s total reflection or no-intersection at refracting surface is called “ray overflow”.Frequent ray overflows in the optical automatic design of fish-eye lens makes its CAD very hard.Using Aitkin Interpolation to fill up the intersection points of overflow-rays at image plane can ensure the optimization process persistently to go along,and then clearing up the overflow gradually.In the end,it expounds the successive approach method to confirm the boundary of abaxial beams,a
王永仲. 红外热成像鱼眼镜头设计中若干特殊问题的处理[J]. 光子学报, 2005, 34(7): 1078. 王永仲. Some Key Problems about the Design of IR Thermal Imaging Fish-eye Lens[J]. ACTA PHOTONICA SINICA, 2005, 34(7): 1078.