Refractive index database

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Optical constants of Ne (Neon)
Cuthbertson and Cuthbertson 1936: n 0.289–0.546 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula


Conditions & Spec sheet

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


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


1) C. Cuthbertson and M. Cuthbertson. The refraction and dispersion of neon and helium. Proc. R. Soc. London A 135, 40-47 (1936)

2) C. Cuthbertson and M. Cuthbertson. On the refraction and dispersion of neon. Proc. R. Soc. London A 83, 149-151 (1910)

* Ref. 1 doesn't cite gas temperature and pressure. See the earlier publication by the same authors (ref. 2) instead.


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Neon, Ne

Neon (Ne) is a noble gas that is colorless, odorless, and inert under standard conditions. It is the fifth most abundant element in the universe. Neon's most familiar use is perhaps in neon signs, where it produces a characteristic bright reddish-orange glow when electricity is applied. This luminescence in neon lighting results from the excitation of neon atoms, which then release a photon as they return to their ground state. Additionally, due to its inertness, neon is used in some types of gas lasers, such as helium-neon (He-Ne) lasers, where it serves as the lasing medium to produce a coherent red light. The low refractive index of neon gas is also of interest in certain optical applications.

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