Hi, allow me using English to reply to your enquiry as it's not convenient for me to type Chinese. ;u(Du-Os! <x),,a=X Regarding your question, I would suggest you defining some parameters first before air it out; 02k4 N% gxGrspqg 1. What wavelength(s) are you operating? \OpoBXh 2. How many components could you use? (any limitation?) X5*C+ I=2 3. Do you prefer using off-shelf lens to customised lens? Or do you have budget for customised lens? [|3>MZ2/ 45H!;Q sk There are some examples in ZEMAX ^U8r0]9 N=)z Under Program Files\ZEMAX\Samples\Sequential\Objectives, you should be able to find some examples. I believe that with properly selection of variables you should be able to achieve an optical solution for the performance target you specified. :p4 "IeKs x)_@9ldYv hope this helps :)