小弟用CODEV設(shè)計(jì)了一個(gè)開普勒望遠(yuǎn)鏡。目鏡用的是對(duì)稱式，物鏡用了一個(gè)雙膠合，視覺放大率為12。 O-YB+~"3Z  
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圖線無法顯示，有報(bào)錯(cuò)，如下： XCku[?Ix  
Warning: At least 3 focal positions are recommended for finding best focus .LEn~ 8  
Warning: This system is not isoplanatic at field(s)  1, 2, 3, 4. Odj4)   
               Any MTF results are of questionable value for assessing 9lCZi?  
               the image quality, except in those cases where the user is 1F58 2 l  
               interested only in the image of a point-like object.  The eXsFPM  
               image quality for the unacceptable fields varies significan- *<T,Fyc|  
               tly over a lateral region of 12 Airy disk diameters. o9D]\PdL>  
Warning: The MTF results at one or more fields are inaccurate. qaN%&K9F8  
               The mapping between entrance pupil coordinates and exit pupil coordinates } l4d/I  
               is nonlinear.  The nature of the nonlinearity is such that Code V is not 4
.0JgX  
               able to compute an accurate MTF result.  Usually, this condition is >
aV Q  
               caused by severe pupil distortion or some discontinuity in the pupil K#oF=4_/|  
               coordinate mapping.  In all cases where the pupil coordinate mapping UXN!iU)  
               has sufficient nonlinearity to cause this warning, the imagery is extremely mtu`m
6Xix  
               nonstationary (non-isoplanatic) and small changes in object space z4[S02s  
               coordinates will cause large changes in the image of a point source. )4/227b/(  
Error: The problem described here occurs at the following field(s): dr8`;$;G*  
                           Field:  1 Kg