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。 >Hb^P)3
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： ]M>9ULQ
Warning: At least 3 focal positions are recommended for finding best focus J&/lx ${
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. gbeghL P[?
Any MTF results are of questionable value for assessing s&kQlQ=
the image quality, except in those cases where the user is W W 2Ob*
interested only in the image of a point-like object. The hVT~~n`Rj
image quality for the unacceptable fields varies significan- ]r! > {
tly over a lateral region of 12 Airy disk diameters. #o/ H~Iv
Warning: The MTF results at one or more fields are inaccurate. Snly UP~P
The mapping between entrance pupil coordinates and exit pupil coordinates ,Y?sfp
is nonlinear. The nature of the nonlinearity is such that Code V is not =o}"jV E
able to compute an accurate MTF result. Usually, this condition is PP~rn fE
caused by severe pupil distortion or some discontinuity in the pupil ZoB*0H-
coordinate mapping. In all cases where the pupil coordinate mapping LH 3}d<{
has sufficient nonlinearity to cause this warning, the imagery is extremely HjqB^ |z
nonstationary (non-isoplanatic) and small changes in object space <$w?/y/'
coordinates will cause large changes in the image of a point source. W!blAkM%i
Error: The problem described here occurs at the following field(s): TC~Q
G$NW
Field: 1 W6T|iZoV"r
Field: 2 H7U li]e3
Field: 3 hv 6@Jr3
Field: 4 $8USyGi3J
ERROR - For field 4, wavelength 1, rays at the edge of the pupil OH^N" L
may be ignored. Check apertures and vignetting for consistency. jN-vY< ?h]
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
