Wavelength dependet complex refractive index (N = n + ik) of crystaline silicon in the NIR, VIS an UV region at 300 K
Data based on:  Palik, Edward D. ; Ghosh, Gorachand: Handbook of optical constants of solids. San Diego : Academic Press, 1998 – ISBN 0125444206
File:Refractive index of silicon (300 K).svg by Cepheiden
Д.Ильин: translation, optimization