zemax can help to design many kinds of optical systems. Here are the basic steps: ?qt .+2:
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1. make spec for your system F~Sw-b kSf
2. make initial design 9=5xt;mEs}
3. choose glass materials (ptk!u6
4. analysize the abration and image... 0=erf62=
5. modify and optimze them (this is the core of the design). aUYq~E tj
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To do these, you need to study basic knowledge of geometric optics.