zemax can help to design many kinds of optical systems. Here are the basic steps: hETTD%
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1. make spec for your system mA:NAV$!s
2. make initial design [m7jZOEu
3. choose glass materials $\>GQ~k
4. analysize the abration and image... D T^3K5
5. modify and optimze them (this is the core of the design). (q+U5Ls6
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To do these, you need to study basic knowledge of geometric optics.