zemax can help to design many kinds of optical systems. Here are the basic steps: RMV/&85?y
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1. make spec for your system 'ZF{R3Xu
2. make initial design Y1\ }5k{>
3. choose glass materials !qQl@j O
4. analysize the abration and image... |*xA8&/
5. modify and optimze them (this is the core of the design). z|J_b"u4
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To do these, you need to study basic knowledge of geometric optics.