zemax can help to design many kinds of optical systems. Here are the basic steps: <anU#bEuQ
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1. make spec for your system nKjT&R
2. make initial design j`MK\*qmz
3. choose glass materials t^~itlE{
4. analysize the abration and image... J@ 8OU
5. modify and optimze them (this is the core of the design). R~RE21kAc
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To do these, you need to study basic knowledge of geometric optics.