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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK10

Wavelength: µm
 (0.300 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.89571408-0.0120013315λ^{2}-0.000136916169λ^{4}+0.0219522159λ^{-2}+0.000357973143λ^{-4}+8.26304425\text{×}10^{-06}λ^{-6}+2.7388172\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.7668e-06 9.8859e-09 -2.8849e-13 6.0939e-07 6.7233e-10 0.19968
n_d: 1.719990
V_d: 50.267183
density: 3.74 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.5e-06 K-1
ΔP_gF: 0.0016
phosphate_resistance: 3.0

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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