[求助]求CODEV中MTF圖線不能顯示的原因 [復(fù)制鏈接]

小弟用CODEV設(shè)計(jì)了一個(gè)開(kāi)普勒望遠(yuǎn)鏡。目鏡用的是對(duì)稱式，物鏡用了一個(gè)雙膠合，視覺(jué)放大率為12。 iOjmj0  
在目鏡和物鏡分別優(yōu)化之后，將二者組合在一起時(shí)發(fā)現(xiàn)Quick 2D能正常顯示，但是MTF圖線無(wú)法顯示，有報(bào)錯(cuò)，如下： M={k4r_t  
Warning: At least 3 focal positions are recommended for finding best focus An/)|B4  
Warning: This system is not isoplanatic at field(s)  1, 2, 3, 4. +]5JXt^  
               Any MTF results are of questionable value for assessing XImb"7|  
               the image quality, except in those cases where the user is lYQcQ*-  
               interested only in the image of a point-like object.  The ={#r/x  
               image quality for the unacceptable fields varies significan- n+Fl|4  
               tly over a lateral region of 12 Airy disk diameters. o] )qv~o)  
Warning: The MTF results at one or more fields are inaccurate. `S$BBF;  
               The mapping between entrance pupil coordinates and exit pupil coordinates uh
:  
               is nonlinear.  The nature of the nonlinearity is such that Code V is not R^%7|  
               able to compute an accurate MTF result.  Usually, this condition is *(D_g!a  
               caused by severe pupil distortion or some discontinuity in the pupil k9yA#
 
               coordinate mapping.  In all cases where the pupil coordinate mapping {{@3r5KGl  
               has sufficient nonlinearity to cause this warning, the imagery is extremely D?X97jNm  
               nonstationary (non-isoplanatic) and small changes in object space 5:^dyF&sm{  
               coordinates will cause large changes in the image of a point source. K V 4>(  
Error: The problem described here occurs at the following field(s): :rk]o*  
                           Field:  1 q SCt=eQ  
                           Field:  2 "b-6kM  
                           Field:  3 R6{%o:{  
                           Field:  4 - bFz  
     ERROR - For  field  4, wavelength  1, rays at the edge of the pupil A g
/z\kX  
             may be ignored. Check apertures and vignetting for consistency. EG<K[t  
這個(gè)究竟是什么問(wèn)題呢？好像是和視場(chǎng)有關(guān)。求高人指點(diǎn)。

1、是無(wú)焦模式嗎？ )1H]a'j  
2、MTF最大設(shè)置成多少了？一般無(wú)焦的到2已經(jīng)很NB了。具體不講了，多看看CODE V相關(guān)的資料

我是初學(xué)，把鏡頭數(shù)據(jù)輸入后，得到的結(jié)果和樓主一樣，無(wú)法做出mtf。

望遠(yuǎn)鏡設(shè)計(jì)是要無(wú)焦的吧?MTF設(shè)置了40,但是物鏡和目鏡分別優(yōu)化時(shí)都是沒(méi)問(wèn)題的啊

設(shè)置成無(wú)焦模式后，把mtf的最大值改成1，具體原因求哥們好好學(xué)習(xí)，個(gè)人能力有限，怕解釋不清楚

多謝指點(diǎn)，雖然不知道為什么，但是圖線出來(lái)了。

非常好的，謝謝

學(xué)習(xí) 學(xué)習(xí)！

系統(tǒng)沒(méi)有銜接好，看看na epd等

codev初學(xué)，學(xué)習(xí)了