zemax can help to design many kinds of optical systems. Here are the basic steps: YcobK#c
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1. make spec for your system uy
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2. make initial design 0V~zZ/e
3. choose glass materials nEsD+}E?
4. analysize the abration and image... G+<XYkz*
5. modify and optimze them (this is the core of the design). NuQ!huh
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To do these, you need to study basic knowledge of geometric optics.