zemax can help to design many kinds of optical systems. Here are the basic steps: 'nh2}
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1. make spec for your system ^>!&]@
2. make initial design vO~w~u5
3. choose glass materials "nfi:A1
4. analysize the abration and image... 0F![<5X
5. modify and optimze them (this is the core of the design). I3r")}P
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To do these, you need to study basic knowledge of geometric optics.