zemax can help to design many kinds of optical systems. Here are the basic steps: DXD+,y\=
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1. make spec for your system ]0<K^OIY
2. make initial design h{"SV*Xpk/
3. choose glass materials Z0H_l/g
4. analysize the abration and image... +pSo(e(
5. modify and optimze them (this is the core of the design). Q*Jb0f
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To do these, you need to study basic knowledge of geometric optics.