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。 oZ/"^5
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： 5L2j, ]
Warning: At least 3 focal positions are recommended for finding best focus r3' DXP
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. lbt8S.fx
Any MTF results are of questionable value for assessing bs\k b-\R
the image quality, except in those cases where the user is rz&V .,s
interested only in the image of a point-like object. The 5>%^"f
image quality for the unacceptable fields varies significan- Pf4zjc
tly over a lateral region of 12 Airy disk diameters. /dg? 6XT/
Warning: The MTF results at one or more fields are inaccurate. J/Y9 X ,
The mapping between entrance pupil coordinates and exit pupil coordinates ,m`&J?
is nonlinear. The nature of the nonlinearity is such that Code V is not YC 4c-M
able to compute an accurate MTF result. Usually, this condition is tx[ ;& ;
caused by severe pupil distortion or some discontinuity in the pupil +Eb-|dM
coordinate mapping. In all cases where the pupil coordinate mapping W f "$
has sufficient nonlinearity to cause this warning, the imagery is extremely '+$r7?dKP
nonstationary (non-isoplanatic) and small changes in object space T=pP
coordinates will cause large changes in the image of a point source. JXk x!X_{
Error: The problem described here occurs at the following field(s): k]:`<`/I_
Field: 1 2"a%%fv
Field: 2 ] +%`WCr9
Field: 3 yw+] S
Field: 4 ZG H
7_K
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 9A4n8,&sm
may be ignored. Check apertures and vignetting for consistency. |=:@<0.'
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
