zemax can help to design many kinds of optical systems. Here are the basic steps: Q$RP2&
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1. make spec for your system _;0:wXib=
2. make initial design ?|8H$1
3. choose glass materials w@oq.K
4. analysize the abration and image... y8,es$
5. modify and optimze them (this is the core of the design). tpCEWdn5
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To do these, you need to study basic knowledge of geometric optics.