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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK04

Wavelength: µm
 (0.290 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.67775568-0.0109363526λ^{2}-0.000112368235λ^{4}+0.0171233781λ^{-2}+0.000257310134λ^{-4}+2.54752519\text{×}10^{-06}λ^{-6}+1.89782794\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.2612e-06 1.0752e-08 5.8447e-14 5.5752e-07 6.8011e-10 0.17205
nd: 1.651000
Vd: 56.237891
glass_status: preferred
density: 3.27 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.6e-06 K-1
dPgF: -0.0047
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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