zemax can help to design many kinds of optical systems. Here are the basic steps: E'LI0fr
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1. make spec for your system _<S!tW
2. make initial design LIID(s!bX
3. choose glass materials rwq
4. analysize the abration and image... ;_cTrjMv\
5. modify and optimze them (this is the core of the design). =d{6=2Pt
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To do these, you need to study basic knowledge of geometric optics.