Optical constants of NaI (Sodium iodide)
Li 1976: n 0.25–40 µm
Wavelength:
µm
(0.25–40)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=0.478+\frac{1.532λ^2}{λ^2-0.170^2}+\frac{4.27λ^2}{λ^2-86.21^2}$$Conditions & Spec sheet
temperature: 297 K
Comments
297 K (23.85 °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 derivation is based on a single data point and knowledge of the dielectric constants and the characteristic absorption peaks.