小弟用CODEV设计了一个开普勒望远镜。目镜用的是对称式，物镜用了一个双胶合，视觉放大率为12。 u4KP;_,m
在目镜和物镜分别优化之后，将二者组合在一起时发现Quick 2D能正常显示，但是MTF图线无法显示，有报错，如下： :lfUVa{HN
Warning: At least 3 focal positions are recommended for finding best focus w7d<Ky_C
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. uHQf <R$:
Any MTF results are of questionable value for assessing rYK GBo8"
the image quality, except in those cases where the user is W2`/z)[*>
interested only in the image of a point-like object. The G u4 mP
image quality for the unacceptable fields varies significan- Sb |9U8h
tly over a lateral region of 12 Airy disk diameters. au;ZAXM|
Warning: The MTF results at one or more fields are inaccurate. o,q47W=7$
The mapping between entrance pupil coordinates and exit pupil coordinates L |`(u
is nonlinear. The nature of the nonlinearity is such that Code V is not LkwjEJQf
able to compute an accurate MTF result. Usually, this condition is $[6] Ly(F)
caused by severe pupil distortion or some discontinuity in the pupil C G0jZB#u
coordinate mapping. In all cases where the pupil coordinate mapping i]{-KZC
has sufficient nonlinearity to cause this warning, the imagery is extremely S|Yz5)*
nonstationary (non-isoplanatic) and small changes in object space B )`@E4i
coordinates will cause large changes in the image of a point source. vU9j|z
Error: The problem described here occurs at the following field(s): e h6\y7 9g
Field: 1 '
X9D( ?O
Field: 2 ! uc"|S?
Field: 3 |Bhj L,
Field: 4 JBK(N k
ERROR - For field 4, wavelength 1, rays at the edge of the pupil ytyX:e"
may be ignored. Check apertures and vignetting for consistency. Hs#q 7
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
