zemax can help to design many kinds of optical systems. Here are the basic steps: +yvtd]D$2W
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1. make spec for your system s9R#rwIc
2. make initial design z ;>xI~
3. choose glass materials -?_#Yttu
4. analysize the abration and image... &\8qN_`
5. modify and optimze them (this is the core of the design). 7>#?-, B
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To do these, you need to study basic knowledge of geometric optics.