Hi, allow me using English to reply to your enquiry as it's not convenient for me to type Chinese. di}YHMTx & = 5 Regarding your question, I would suggest you defining some parameters first before air it out; gUzCD B^.: *_}|EuY 1. What wavelength(s) are you operating? !1K<iz_8 2. How many components could you use? (any limitation?) T;X8 T 3. Do you prefer using off-shelf lens to customised lens? Or do you have budget for customised lens? 'F^nW_ryW S',i There are some examples in ZEMAX Y15KaoK? ao>bnRXR 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. O79;tA<k 1[o] u:m9U hope this helps :)