zemax can help to design many kinds of optical systems. Here are the basic steps: 3!Ca b/T
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1. make spec for your system 5-.{RU=
2. make initial design Mp_SL^g|
3. choose glass materials 5D<"kT
4. analysize the abration and image... "Ax#x
5. modify and optimze them (this is the core of the design). 7z9[\]tt
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To do these, you need to study basic knowledge of geometric optics.