zemax can help to design many kinds of optical systems. Here are the basic steps: 0w(<pNA
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1. make spec for your system ^t#]E#
2. make initial design ~1}NQa(
3. choose glass materials 7p2x}[ .\
4. analysize the abration and image... 8xL-j2w
5. modify and optimze them (this is the core of the design). GJ?rqmbL
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To do these, you need to study basic knowledge of geometric optics.