zemax can help to design many kinds of optical systems. Here are the basic steps: !&'GWQY{(
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1. make spec for your system 7Gwn ,&)
2. make initial design aQjs5RbP~
3. choose glass materials ?A4zIJ\
4. analysize the abration and image... 7s8-Uwl<
5. modify and optimze them (this is the core of the design). '%Cc!63t*
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To do these, you need to study basic knowledge of geometric optics.