zemax can help to design many kinds of optical systems. Here are the basic steps: O8 \dMb
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1. make spec for your system W>*9T?
2. make initial design vs`"BQYf
3. choose glass materials oQ=v:P]
4. analysize the abration and image... aT[qJbp1
5. modify and optimze them (this is the core of the design). V2&O]bR
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To do these, you need to study basic knowledge of geometric optics.