zemax can help to design many kinds of optical systems. Here are the basic steps: ^G(+sb[t
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1. make spec for your system [6a&9#[A
2. make initial design ?$X1X`@
3. choose glass materials '\Hh
4. analysize the abration and image... |Ns[{/
5. modify and optimze them (this is the core of the design). s$OnQc2/
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To do these, you need to study basic knowledge of geometric optics.