Optical constants of Air
Ciddor 1996: n 0.23–1.690 µm
Wavelength:
µm
(0.23–1.69)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n-1=\frac{0.05792105}{238.0185-λ^{-2}}+\frac{0.00167917}{57.362-λ^{-2}}$$Conditions & Spec sheet
n_absolute: true wavelength_vacuum: true temperature: 15 ℃ pressure: 101325 Pa
Comments
Standard air: dry air at 15 ℃, 101.325 kPa and with 450 ppm CO2 content.
References
P. E. Ciddor. Refractive index of air: new equations for the visible and near infrared, Appl. Optics 35, 1566-1573 (1996)
[Calculation script (Python) - can be used for calculating refractive index of air at a given humidity, temperatire, pressure, and CO2 concentration]