Optical constants of He (Helium)
Mansfield and Peck 1969: n 0.480–2.06 µm
Wavelength:
µm
(0.4801–2.0586)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n-1=\frac{0.01470091}{423.98-λ^{-2}}$$Conditions & Spec sheet
n_absolute: true wavelength_vacuum: true temperature: 0 ℃ pressure: 101325 Pa
Comments
Standard conditions: 0 ℃, 760 torr (101.325 kPa).
References
C. R. Mansfield and E. R. Peck. Dispersion of helium, J. Opt. Soc. Am. 59, 199-203 (1969)