zemax can help to design many kinds of optical systems. Here are the basic steps: ,UQ4`Mh^L
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1. make spec for your system vN%zk(?T
2. make initial design \xk`o5/{
3. choose glass materials CTt3W>'=+
4. analysize the abration and image... Cw]Q)rX{
5. modify and optimze them (this is the core of the design). " *xQN "F
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To do these, you need to study basic knowledge of geometric optics.