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。 ,_ag;pt9)
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： Dr;iQ kGP
Warning: At least 3 focal positions are recommended for finding best focus #Dfo#]k(
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. S- #q~X!yJ
Any MTF results are of questionable value for assessing =:+0)t=ao
the image quality, except in those cases where the user is _ q(Q
interested only in the image of a point-like object. The US{3pkr;I]
image quality for the unacceptable fields varies significan- iqW1#)3'R
tly over a lateral region of 12 Airy disk diameters. , %YBG1E[y
Warning: The MTF results at one or more fields are inaccurate. vVT ?h
The mapping between entrance pupil coordinates and exit pupil coordinates ftBq^tC
is nonlinear. The nature of the nonlinearity is such that Code V is not V,EF'-F
able to compute an accurate MTF result. Usually, this condition is wve =.n
caused by severe pupil distortion or some discontinuity in the pupil o/o:2p.
coordinate mapping. In all cases where the pupil coordinate mapping
_GqS&JHSf
has sufficient nonlinearity to cause this warning, the imagery is extremely A -CUv[pM
nonstationary (non-isoplanatic) and small changes in object space tZ2e!<C
coordinates will cause large changes in the image of a point source. oPKXZU(c
Error: The problem described here occurs at the following field(s): U/;]zdP.K
Field: 1 amQz^^
Field: 2 0uCT+ -
Field: 3 UK*qKj. )
Field: 4 ~ 2 u\
ERROR - For field 4, wavelength 1, rays at the edge of the pupil bzi|s5!'<
may be ignored. Check apertures and vignetting for consistency. 9j*0 D("
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
