zemax can help to design many kinds of optical systems. Here are the basic steps: %upnXRzw
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1. make spec for your system $Ay
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2. make initial design jkw:h0hX
3. choose glass materials C,T9xm
4. analysize the abration and image... {a-bew
5. modify and optimze them (this is the core of the design). =@$G3DM
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To do these, you need to study basic knowledge of geometric optics.