zemax can help to design many kinds of optical systems. Here are the basic steps: p=V1M-
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1. make spec for your system 8JXS:J.|v
2. make initial design p|em_!H"SH
3. choose glass materials {e1sq^>|
4. analysize the abration and image... 7m %[$X`
5. modify and optimze them (this is the core of the design). J!}\v=Rn
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To do these, you need to study basic knowledge of geometric optics.