zemax can help to design many kinds of optical systems. Here are the basic steps: +_7*iJtD5
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1. make spec for your system @<<<C?CTv
2. make initial design ^m
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3. choose glass materials ;1#H62Z*
4. analysize the abration and image... MU>k,:[
5. modify and optimze them (this is the core of the design). y@]_+2Vo
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To do these, you need to study basic knowledge of geometric optics.