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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK13

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.81256049-0.0123338559λ^{2}-0.000146274016λ^{4}+0.0196331804λ^{-2}+0.00031921638λ^{-4}+3.67504765\text{×}10^{-06}λ^{-6}+2.77132755\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.8785e-06 1.2562e-08 -2.1995e-12 6.5808e-07 7.5438e-10 0.15591
n_d: 1.693500
V_d: 53.203150
density: 3.69 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6e-06 K-1
ΔP_gF: -0.0071
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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