关于APO,引自 托马斯.贝克 (Thomas M. Back)——
Cited from Mr. Thomas M. Back who is a famous optical lens designer in the world, his definition of apochromats is the following: An objective in which the wave aberrations do not exceed 1/4 wave optical path difference (OPD) in the spectral range from C (6563A - red) to F (4861A - blue), while the g wavelength (4358A - violet) is 1/2 wave OPD or better, has three widely spaced zero color crossings and is corrected for coma.
明视觉峰值响应位于555nm为中心的可见光谱区的黄绿光谱部分,在此波长上,望远镜物镜成像的strehl系数达到或者高于0.95;彗形像差在全口径范围内得到校正;光谱的范围从C(6563A-红)到F(4861A-蓝),光波不超过四分之一的光程差(OPD);而g波长(4358A-紫)是二分之一的OPD或者更好,那么这个物镜符合现代对于复消色差的定义。 |