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。 " rsSW3_
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: &Y+e=1a+
Warning: At least 3 focal positions are recommended for finding best focus 4h;4!I|
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. \6{LR&
Any MTF results are of questionable value for assessing t ^m~
the image quality, except in those cases where the user is sds}bo
interested only in the image of a point-like object. The m~;B:LN<
image quality for the unacceptable fields varies significan- "e@n:N!
tly over a lateral region of 12 Airy disk diameters. +>!V]S
Warning: The MTF results at one or more fields are inaccurate.
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The mapping between entrance pupil coordinates and exit pupil coordinates 8fh4%#,C%
is nonlinear. The nature of the nonlinearity is such that Code V is not E:)Cp
able to compute an accurate MTF result. Usually, this condition is G{+2xN
a(
caused by severe pupil distortion or some discontinuity in the pupil w-ALCh8o
coordinate mapping. In all cases where the pupil coordinate mapping L/yaVU{aEb
has sufficient nonlinearity to cause this warning, the imagery is extremely 6|5H=*)DH
nonstationary (non-isoplanatic) and small changes in object space D^|9/qm$
coordinates will cause large changes in the image of a point source. 4^[
/=J}
Error: The problem described here occurs at the following field(s): BKay*!'PX
Field: 1 eeW`JG-E
Field: 2 h,t:]
Field: 3 <[ZI.+_Wt
Field: 4 QjJfE<h
ERROR - For field 4, wavelength 1, rays at the edge of the pupil NO2(vE
may be ignored. Check apertures and vignetting for consistency. wG8
nw;
这个究竟是什么问题呢?好像是和视场有关。求高人指点。