Hi, allow me using English to reply to your enquiry as it's not convenient for me to type Chinese. SxMj,u%X/ iZ;TYcT Regarding your question, I would suggest you defining some parameters first before air it out; >.LKct*5K ~L4eZ 1. What wavelength(s) are you operating? l4ouZR 2. How many components could you use? (any limitation?) Vz w PBQ - 3. Do you prefer using off-shelf lens to customised lens? Or do you have budget for customised lens? @E_zR nb+m.X There are some examples in ZEMAX Z$;"8XUM 7GZq|M_:y 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. >o[|"oLO e|'N(D}h* hope this helps :)