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Optical constants of He (Helium)
Mansfield and Peck 1969: n 0.4801-2.0586 µm

Wavelength: µm
 (0.4801 – 2.0586)  
 

Other optical constants

logX   logY   eV

Dispersion formula

$$n-1=\frac{0.01470091}{423.98-λ^{-2}}$$

Comments

Standard conditions: 0 °C, 760 torr (101.325 kPa).

Data

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

Additional information

n_is_absolute: true
λ_is_vacuum: true
temperature: 0 °C
pressure: 101325 Pa

References

C. R. Mansfield and E. R. Peck. Dispersion of helium, J. Opt. Soc. Am. 59, 199-203 (1969)

More info - wiki

Helium, He

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