Color and Passive Atherm

By Scott Sparrold

One can select two components to correct axial color
OR
One can select two components to passively athermalize a lens.

Notice the conjunction used to connect those two statements. It is a half truth. In some cases it can be an "AND". This section describes the process:

=> One can select two components to color correct and passively athermalize a lens!!!!

The preceding shows how to design a doublet. Very often, the materials available do not conform and it requires the desinger to consider greater than 2 optical elements. The preceding method can be used for more than two elements