zemax can help to design many kinds of optical systems. Here are the basic steps: So^`L s;S
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1. make spec for your system +,[3a%c)H
2. make initial design q+z\Y?
3. choose glass materials ]~zJ7I
4. analysize the abration and image... pd1m/:
5. modify and optimze them (this is the core of the design). )eEvyU
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To do these, you need to study basic knowledge of geometric optics.