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。 aP^,@RrL
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: eAN]*:]g
Warning: At least 3 focal positions are recommended for finding best focus 89T xd9X
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. -b+VzVJZ
Any MTF results are of questionable value for assessing _MQ)
the image quality, except in those cases where the user is .g71?^?(
interested only in the image of a point-like object. The r'xZF~}k"~
image quality for the unacceptable fields varies significan- Rhh5r0 \5
tly over a lateral region of 12 Airy disk diameters. f tW-
Warning: The MTF results at one or more fields are inaccurate. SskvxH+7
The mapping between entrance pupil coordinates and exit pupil coordinates $,$bZV
is nonlinear. The nature of the nonlinearity is such that Code V is not {]1o($.u
able to compute an accurate MTF result. Usually, this condition is _<pSCR0
caused by severe pupil distortion or some discontinuity in the pupil GJN"43
coordinate mapping. In all cases where the pupil coordinate mapping (c;F%m|
has sufficient nonlinearity to cause this warning, the imagery is extremely gSQq
nonstationary (non-isoplanatic) and small changes in object space vI3L <[W
coordinates will cause large changes in the image of a point source. 0o~? ]C
Error: The problem described here occurs at the following field(s): Z18T<e
Field: 1 vw VeHjR
Field: 2 Vm}OrFA
Field: 3 rOd<nP^`\
Field: 4 ?145^ w
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 5v6 x
may be ignored. Check apertures and vignetting for consistency. 94 58.!3
这个究竟是什么问题呢?好像是和视场有关。求高人指点。