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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK8

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.87779172-0.0135972618λ^{2}-0.000208866139λ^{4}+0.0203518573λ^{-2}+0.000244901642λ^{-4}+1.23070041\text{×}10^{-05}λ^{-6}-1.32629677\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.48407e-06 8.89748e-09 4.99726e-13 6.52693e-07 7.80412e-10 8e-09
nd: 1.713000
Vd: 53.958770
density: 3.72 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.3e-06 K-1
dPgF: -0.0086
phosphate_resistance: 4.0

References

NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets

Data

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

INFO

Hikari Glass Co., Ltd.

Hikari Glass Co., Ltd. is a Japanese glass maker, a subsidiary of Nikon Corp.

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