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。 (2 mS v
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： FJ nG<5Rh
Warning: At least 3 focal positions are recommended for finding best focus o^N%;d1%E
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. /}[zA@
Any MTF results are of questionable value for assessing Y}*Ctdrl
the image quality, except in those cases where the user is g9! d pP
interested only in the image of a point-like object. The ,\Z8*Jr3Q
image quality for the unacceptable fields varies significan- UYl JO{|a
tly over a lateral region of 12 Airy disk diameters. "F04c|oR<X
Warning: The MTF results at one or more fields are inaccurate. 5 ,g$|,Shv
The mapping between entrance pupil coordinates and exit pupil coordinates
; \ Y-
is nonlinear. The nature of the nonlinearity is such that Code V is not )bF)RL Z
able to compute an accurate MTF result. Usually, this condition is ye9QTK6$,
caused by severe pupil distortion or some discontinuity in the pupil Es_ SCWJ
coordinate mapping. In all cases where the pupil coordinate mapping _zAc 5rS
has sufficient nonlinearity to cause this warning, the imagery is extremely b 49|4
nonstationary (non-isoplanatic) and small changes in object space 3Ro7M=]
coordinates will cause large changes in the image of a point source. REeD?u j
Error: The problem described here occurs at the following field(s): R?i-"JhW
Field: 1 <$Xn:B<H
Field: 2 ntd
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Field: 3 "Vs
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Field: 4 {5?!`<fF
ERROR - For field 4, wavelength 1, rays at the edge of the pupil c| 8KT
may be ignored. Check apertures and vignetting for consistency. L+` }euu5
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
