zemax can help to design many kinds of optical systems. Here are the basic steps: E;[ANy4L
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1. make spec for your system iOCx7j{BS
2. make initial design ?W l=F/
3. choose glass materials K8,fw-S%
4. analysize the abration and image... qA4w*{JN
5. modify and optimze them (this is the core of the design). {fi:]|<1h
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To do these, you need to study basic knowledge of geometric optics.