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ljwcdtj 2012-05-17 12:02

求CODEV中MTF图线不能显示的原因

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。 +KDB^{  
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: -a]oN:ERb  
Warning: At least 3 focal positions are recommended for finding best focus @pYAqX2  
Warning: This system is not isoplanatic at field(s)  1, 2, 3, 4. i+Px &9o<9  
               Any MTF results are of questionable value for assessing `f*?|)  
               the image quality, except in those cases where the user is ;_of'  
               interested only in the image of a point-like object.  The c _O| ?1  
               image quality for the unacceptable fields varies significan- gx4`pH;B\  
               tly over a lateral region of 12 Airy disk diameters. ;QW6Tgt11  
Warning: The MTF results at one or more fields are inaccurate. wX#=l?,K  
               The mapping between entrance pupil coordinates and exit pupil coordinates N|z-s  
               is nonlinear.  The nature of the nonlinearity is such that Code V is not L/<^uO1  
               able to compute an accurate MTF result.  Usually, this condition is el.;T*Wn  
               caused by severe pupil distortion or some discontinuity in the pupil YQ 4;X8I`r  
               coordinate mapping.  In all cases where the pupil coordinate mapping c3P  
               has sufficient nonlinearity to cause this warning, the imagery is extremely 9X@y*;w<t  
               nonstationary (non-isoplanatic) and small changes in object space 5ts8o&|   
               coordinates will cause large changes in the image of a point source. {]] nQ  
Error: The problem described here occurs at the following field(s): engql;  
                           Field:  1 7zVaj"N(  
                           Field:  2 Bg"b,&/^u  
                           Field:  3 w%VHq z$  
                           Field:  4 K;_p>bI5  
     ERROR - For  field  4, wavelength  1, rays at the edge of the pupil b,~4O~z  
             may be ignored. Check apertures and vignetting for consistency. oA"t`,3  
这个究竟是什么问题呢?好像是和视场有关。求高人指点。
lixun201 2012-05-17 20:21
1、是无焦模式吗? IcoK22/  
2、MTF最大设置成多少了?一般无焦的到2已经很NB了。具体不讲了,多看看CODE V相关的资料
imissyoumg 2012-05-18 14:11
我是初学,把镜头数据输入后,得到的结果和楼主一样,无法做出mtf。
ljwcdtj 2012-05-18 16:49
望远镜设计是要无焦的吧?MTF设置了40,但是物镜和目镜分别优化时都是没问题的啊
lixun201 2012-05-18 17:34
设置成无焦模式后,把mtf的最大值改成1,具体原因求哥们好好学习,个人能力有限,怕解释不清楚
ljwcdtj 2012-05-19 10:48
多谢指点,虽然不知道为什么,但是图线出来了。
漫语 2012-05-22 17:16
非常好的,谢谢
jinlai 2013-11-25 10:50
学习 学习!
jinlai 2014-01-09 10:31
系统没有衔接好,看看na epd等
yanzhiyan 2017-12-26 15:13
codev初学,学习了
sjtuchenyuan 2018-01-02 16:05
这个是不是因为系统的几个视场焦对不到一起去
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