zemax can help to design many kinds of optical systems. Here are the basic steps: ayD}r#7
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1. make spec for your system ;@Z#b8aM}
2. make initial design &8_gRP
3. choose glass materials ;)e2@'Agl
4. analysize the abration and image... 9;Ox;;w
5. modify and optimze them (this is the core of the design). Upd3-2kr&J
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To do these, you need to study basic knowledge of geometric optics.