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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK01

Wavelength: µm
 (0.290 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.64746203-0.0131056736λ^{2}-0.000166347533λ^{4}+0.0155169536λ^{-2}+0.000192870468λ^{-4}+4.84379496\text{×}10^{-06}λ^{-6}-7.97499057\text{×}10^{-09}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.681e-06 1.2495e-08 -2.178e-12 4.413e-07 5.0881e-10 0.17484
nd: 1.640000
Vd: 60.193092
density: 3.01 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6e-06 K-1
dPgF: -0.0056
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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