RefractiveIndex.INFO

Refractive index database


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Optical constants of Air
Ciddor 1996: n 0.23-1.690 µm

Wavelength: µm
 (0.23 – 1.69)  
 

Complex refractive index (n+ik)[ i ]


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 °C
pressure: 101325 Pa

Comments

Standard air: dry air at 15 °C, 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]

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

Air

External links