zemax can help to design many kinds of optical systems. Here are the basic steps: q*T+8O
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1. make spec for your system ELm#
2. make initial design k_skn3,u
3. choose glass materials Zd%*,\`S
4. analysize the abration and image... 33; ytd
5. modify and optimze them (this is the core of the design). 27MgwX
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To do these, you need to study basic knowledge of geometric optics.