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。 9NwUX h(:(
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： U%bm{oVn
Warning: At least 3 focal positions are recommended for finding best focus :AlvWf$d
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. :qxWANUa
Any MTF results are of questionable value for assessing ORrZu$n`p
the image quality, except in those cases where the user is 'i$. _Tx
interested only in the image of a point-like object. The roc DO8f
image quality for the unacceptable fields varies significan- (<>? ?(V M
tly over a lateral region of 12 Airy disk diameters. z4_B/Q
Warning: The MTF results at one or more fields are inaccurate. Ojz'p5d`>
The mapping between entrance pupil coordinates and exit pupil coordinates <o|fH~? X
is nonlinear. The nature of the nonlinearity is such that Code V is not '6vo#D9M
able to compute an accurate MTF result. Usually, this condition is `w#VYs|k
caused by severe pupil distortion or some discontinuity in the pupil b||usv[or
coordinate mapping. In all cases where the pupil coordinate mapping
3}s]F/e
has sufficient nonlinearity to cause this warning, the imagery is extremely G@Z%[YNw
nonstationary (non-isoplanatic) and small changes in object space &c!6e<o[p
coordinates will cause large changes in the image of a point source. 7~+Fec`Ut*
Error: The problem described here occurs at the following field(s): dQSO8J f
Field: 1 uQc("F
Field: 2 !0hyp |F:>
Field: 3 c&wg`1{Hal
Field: 4 ^G`6Zg ;
ERROR - For field 4, wavelength 1, rays at the edge of the pupil }*rS g .
may be ignored. Check apertures and vignetting for consistency. A^M]vk%dg
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
