SYNOPSYS 光學(xué)設(shè)計軟件課程四十：從Scratch開始的非球面相機(jī)鏡頭

c9j*n;Q  
在開發(fā)一款現(xiàn)代手機(jī)鏡頭或針孔間諜相機(jī)時，設(shè)計師們越來越多地使用非球面。它們通常是很小的塑膠元件，盡管制作模具很昂貴，但鏡頭可以大量生產(chǎn)，成本很低。甚至可以用法蘭機(jī)直接模壓到元件上，使組裝更簡單，這種方法可以使某些元件尺寸保持在非常小的公差范圍內(nèi)。 O)kgBrB  
為幫助設(shè)計此類系統(tǒng)，DSEARCH™可以對具有非球面的系統(tǒng)進(jìn)行全局搜索。 建議用戶閱讀SYNOPSYS™用戶手冊中關(guān)于這一強(qiáng)大功能的介紹。 我們在此給出一個如何將DSEARCH用于典型系統(tǒng)的示例。

kkvtB<<Y  
    PROJ                ! start project timer :K?0e`  
    CCW                 ! clear command window +,50qN:%[  
    CORE 16             ! use 16 cores for speed NZN-^ >  
    DSEARCH 1 QUIET      ! start DSEARCH; put best lens in library location 1 - O"i3>C  
    SYSTEM                ! define the system specs #k<":O  
    ID DSEARCH ASPHERIC CAMERA LENS ! identification ?EU\}N J
 
    OBB 0 41.3 .285     ! infinite object, semi field 41.3 degrees, semi ap. 0.285 51#"3S  
    UNI MM           ! lens will be in millimeters M=xQ=j?  
    WAVL CDF          ! use visual wavelengths at C, d, and F lines MHL("v(@B  
    END           ! end of system section [!^-J}^g~\  
}j1!j&&  
    GOALS           ! define the goals here M[~{Vd  
    ELEMENTS 5       ! we want a four-element lens with a cover glass 5cK@WE:  
    BACK 0.4 SET      ! ask for 0.4 mm back focus distance ;nmM7TZ;  
    FNUM 2.7 10       ! ask for F/2.7, weight of 10 ^MD;"A<  
    THSTART 1          ! global search use thicknesses 1 mm Aa?I8sbc  
    RSTART 30          ! and starting radius of 30 mm fqs]<qi  
    ASPH Q           ! use conic constant even in quick mode kl1Y] ?z}  
    ASPH 3           ! allow three aspheric terms: CC, 4th, 6th power of aperture ;Qi }{;+  
PN$ .X"D8  
    DELAY OFF          ! these runs are fast, so don’t ask to continue on timeout I8H%=Kb?9  
    ANNEAL 10 1 Q      ! anneal each case, temp 10 degrees, cool 1, including quick 2JmZ
{