zemax can help to design many kinds of optical systems. Here are the basic steps: A$-\Er+f
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1. make spec for your system yny1i9
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2. make initial design Bb.U4#
3. choose glass materials 4DsHUc6
4. analysize the abration and image... t(p}0}Pp
5. modify and optimze them (this is the core of the design). `&i\q=u+
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To do these, you need to study basic knowledge of geometric optics.