zemax can help to design many kinds of optical systems. Here are the basic steps: ,6%hu|Y*
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1. make spec for your system 2Be ?5+
2. make initial design YI? C-,
3. choose glass materials }]Gi@Nh|o
4. analysize the abration and image... <MWXew7b
5. modify and optimze them (this is the core of the design). O=!)})YG
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To do these, you need to study basic knowledge of geometric optics.