zemax can help to design many kinds of optical systems. Here are the basic steps: pV9$Vg?-H
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1. make spec for your system mp*&{[XoVC
2. make initial design p`fUpARA!
3. choose glass materials 7v]>ID
4. analysize the abration and image... )>QpR8
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5. modify and optimze them (this is the core of the design). Q(
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To do these, you need to study basic knowledge of geometric optics.