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Refractive index database

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Optical constants of OHARA - LAM (Lanthanum, medium-index)
LAM2

Wavelength: µm
 (0.334 – 2.325)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.967968-0.011312544λ^{2}+0.024812309λ^{-2}+0.00067776202λ^{-4}-1.0278339\text{×}10^{-05}λ^{-6}+2.1968703\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 25.0 °C
n_d: 1.743997
V_d: 44.787528
glass_code: 744448
glass_status: preferred

References

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets

Data

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

INFO

Ohara Group

Ohara Group is an international group of companies with headquarters in Japan and subsidiaries in Japan (Ohara, Inc.), United States (Ohara Corporation), and Germany (Ohara, GmbH). Ohara manufactures optical and electronic products and also offers measurement services, in particular measurement of refractive indices of solids and liquids.

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