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。 A7Cm5>Y _S
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： <y('h I'
Warning: At least 3 focal positions are recommended for finding best focus !7O+og L
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. R6<X%*&%
Any MTF results are of questionable value for assessing Z!a =dnwHz
the image quality, except in those cases where the user is 7dTkp!'X-
interested only in the image of a point-like object. The _2Zx?<] 2E
image quality for the unacceptable fields varies significan- 6m/r+?'
tly over a lateral region of 12 Airy disk diameters. + /4A
Warning: The MTF results at one or more fields are inaccurate. ONB{_X?
The mapping between entrance pupil coordinates and exit pupil coordinates u
OmtyX
is nonlinear. The nature of the nonlinearity is such that Code V is not 4$HhP, gL=
able to compute an accurate MTF result. Usually, this condition is MIeU,KT#U
caused by severe pupil distortion or some discontinuity in the pupil z3{ G9Np
coordinate mapping. In all cases where the pupil coordinate mapping q"CVcLi9
has sufficient nonlinearity to cause this warning, the imagery is extremely q5J5>
nonstationary (non-isoplanatic) and small changes in object space Y!aSs3c
coordinates will cause large changes in the image of a point source. L:$ ,v^2
Error: The problem described here occurs at the following field(s): u"r`3P`
Field: 1 G/y5H;<9M
Field: 2 P [G)sA_"
Field: 3 0I-9nuw,^;
Field: 4 b"<liGh"n-
ERROR - For field 4, wavelength 1, rays at the edge of the pupil + B,}Q r
may be ignored. Check apertures and vignetting for consistency. 60^`JVGWH
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
