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。 '3B"@^]
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： 4 :1URhE
Warning: At least 3 focal positions are recommended for finding best focus ! @EZ
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. mn5 y]:;`
Any MTF results are of questionable value for assessing b; kgP`%%
the image quality, except in those cases where the user is !vd(WKq
interested only in the image of a point-like object. The }Xa1K;KM{
image quality for the unacceptable fields varies significan- 6"@`iY
tly over a lateral region of 12 Airy disk diameters. Y.>F fL
Warning: The MTF results at one or more fields are inaccurate. S fl. &A(
The mapping between entrance pupil coordinates and exit pupil coordinates Cp!bsasj
is nonlinear. The nature of the nonlinearity is such that Code V is not )96tBA%u
able to compute an accurate MTF result. Usually, this condition is l Vb{bO9-O
caused by severe pupil distortion or some discontinuity in the pupil VsIDd}~C%
coordinate mapping. In all cases where the pupil coordinate mapping V{qpha4'P
has sufficient nonlinearity to cause this warning, the imagery is extremely BqoGHg4iq
nonstationary (non-isoplanatic) and small changes in object space EV=/'f[++
coordinates will cause large changes in the image of a point source. JU>F&g/|
Error: The problem described here occurs at the following field(s): l~",<bTc
Field: 1 a] =k-Xh
Field: 2 a!?JVhD&
Field: 3 2 ~ [
Field: 4 VD.wO%9?)
ERROR - For field 4, wavelength 1, rays at the edge of the pupil f2*e&+LjTP
may be ignored. Check apertures and vignetting for consistency. Qs\m" y x
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
