zemax can help to design many kinds of optical systems. Here are the basic steps: <Z{pjJ/
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1. make spec for your system 1B}q?8n
2. make initial design 3OnIAk3
3. choose glass materials GJZGHUB=>
4. analysize the abration and image... /$NDH]a
5. modify and optimze them (this is the core of the design). x)evjX=q
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To do these, you need to study basic knowledge of geometric optics.