Optical constants of KI (Potassium iodide)
Li 1976: n 0.25–50 µm
Wavelength:
µm
(0.25–50)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=0.47285+\frac{0.16512λ^2}{λ^2-0.129^2}+\frac{0.41222λ^2}{λ^2-0.175^2}+\frac{0.44163λ^2}{λ^2-0.187^2}+\frac{0.16076λ^2}{λ^2-0.219^2}+\frac{0.33571λ^2}{λ^2-69.44^2}+\frac{1.92474λ^2}{λ^2-98.04^2}$$Comments
297 K (24 °C).
References
H. H. Li. Refractive index of alkali halides and its wavelength and temperature derivatives. J. Phys. Chem. Ref. Data 5, 329-528 (1976) and references therein.
* Sellmeier formula is derived by critical analysis of experimental data from several sources.