zemax can help to design many kinds of optical systems. Here are the basic steps: .\b.l@O<Z
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1. make spec for your system RuHDAJ"&a
2. make initial design MT{1/A;`)
3. choose glass materials awzlLI<2p
4. analysize the abration and image... (%^C}`|EA
5. modify and optimze them (this is the core of the design). >!fTWdD^
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To do these, you need to study basic knowledge of geometric optics.