zemax can help to design many kinds of optical systems. Here are the basic steps: p[^a4E_v
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1. make spec for your system \#(tI3
2. make initial design eJ
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3. choose glass materials })F.Tjf*
4. analysize the abration and image... ?h|&kRq
5. modify and optimze them (this is the core of the design). :3N&&]
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To do these, you need to study basic knowledge of geometric optics.