zemax can help to design many kinds of optical systems. Here are the basic steps: 4sMA'fG
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1. make spec for your system yI$KBx/]n
2. make initial design @^R6}qJ
3. choose glass materials /#TtAkH
4. analysize the abration and image... E &G]R!
5. modify and optimze them (this is the core of the design). [`(W(0U%
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To do these, you need to study basic knowledge of geometric optics.