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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK9

Wavelength: µm
 (0.310 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.80700795-0.0135938061λ^{2}-0.000153406686λ^{4}+0.0188808096λ^{-2}+0.000280739188λ^{-4}+5.33547368\text{×}10^{-06}λ^{-6}+1.19947182\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.9877e-06 1.2157e-08 -1.5613e-12 5.0487e-07 6.0552e-10 0.17285
nd: 1.691000
Vd: 54.934151
glass_status: preferred
density: 3.48 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.9e-06 K-1
dPgF: -0.0079
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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