Color Correction

By Scott Sparrold (under construction)

This is a quick outline for how a lens focal length varies with wavelength shift (color).

Secondary Color and How to compute it

Two element solutions
MWIR: Si / Ge
Visible S-FPL53 / S-BSM81 or H-FK61 / H-BAK6
Three element solutions

Have a crazy doublet? Want to know the doublet's equivalent V and P?

Under construction