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。 ,X:3w3nr^
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： LEtGrA/%@b
Warning: At least 3 focal positions are recommended for finding best focus k:j_:C&.
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. w/*#TDR
Any MTF results are of questionable value for assessing $uFvZ?w&
the image quality, except in those cases where the user is ~}d\sQF .
interested only in the image of a point-like object. The u$zRm(!RB
image quality for the unacceptable fields varies significan- Bsg^[~jWJu
tly over a lateral region of 12 Airy disk diameters. x\~ <8o
Warning: The MTF results at one or more fields are inaccurate. yS 4VgP'W
The mapping between entrance pupil coordinates and exit pupil coordinates S#oBO%!
is nonlinear. The nature of the nonlinearity is such that Code V is not :k`Qj(7S
able to compute an accurate MTF result. Usually, this condition is [\<#iRcP
caused by severe pupil distortion or some discontinuity in the pupil _=`DzudE
coordinate mapping. In all cases where the pupil coordinate mapping WHOy\j},V
has sufficient nonlinearity to cause this warning, the imagery is extremely "fhQ{b$i
nonstationary (non-isoplanatic) and small changes in object space z )v o
coordinates will cause large changes in the image of a point source. lc~c=17
Error: The problem described here occurs at the following field(s): 2vG
X\W% 3
Field: 1 edcz%IOM(
Field: 2 L>g6
9D !
Field: 3 )CE]s)6+2
Field: 4 5bXpj86mY
ERROR - For field 4, wavelength 1, rays at the edge of the pupil LH+ Bu%s
may be ignored. Check apertures and vignetting for consistency. >?ar
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
