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Refractive index database

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Optical constants of CRYSTALS
Sapphire (Al2O3)

Wavelength: µm
 (0.2 – 5)  
 

Derived optical constants

logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.4313493λ^2}{λ^2-0.0726631^2}+\frac{0.65054713λ^2}{λ^2-0.1193242^2}+\frac{5.3414021λ^2}{λ^2-18.028251^2}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20 °C
direction: o

Comments

Synthetic sapphire, Ordinary ray (o), 20 °C

References

1) I. H. Malitson and M. J. Dodge. Refractive Index and Birefringence of Synthetic Sapphire, J. Opt. Soc. Am. 62, 1405 (1972)
2) M. J. Dodge, "Refractive Index" in Handbook of Laser Science and Technology, Volume IV, Optical Materials: Part 2, CRC Press, Boca Raton, 1986, p. 30
* Ref. 1 is a talk abstract in a conference program; Ref. 2 provides Sellmeier equation

Data

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

INFO

Aluminium sesquioxide, Al2O3

Other names

  • Alumina
  • Aluminium oxide
  • Aloxite
  • Aluminium oxide (α)
  • Aluminium(III) oxide
  • Dialuminium trioxide

Mineral

  • Corundum

Gemstones

  • Sapphire
  • Ruby

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Crystals

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