zemax can help to design many kinds of optical systems. Here are the basic steps: @0aUWG!k
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1. make spec for your system xv
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2. make initial design a/_ `1
3. choose glass materials :f`1
4. analysize the abration and image... }/6jom9U?
5. modify and optimze them (this is the core of the design). 6(wpf^br2
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To do these, you need to study basic knowledge of geometric optics.