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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK14

Wavelength: µm
 (0.290 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.8267987-0.0140346783λ^{2}-0.000170936348λ^{4}+0.0189011366λ^{-2}+0.00027593367λ^{-4}+5.15919094\text{×}10^{-06}λ^{-6}+9.87059817\text{×}10^{-08}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.9256e-06 1.1453e-08 -1.3417e-12 5.0269e-07 4.3535e-10 0.16504
nd: 1.696800
Vd: 55.520369
density: 3.63 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.6e-06 K-1
dPgF: -0.0082
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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