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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK7

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.6823272-0.0119713031λ^{2}-0.00014372436λ^{4}+0.0164555463λ^{-2}+0.000217295781λ^{-4}+4.69383509\text{×}10^{-06}λ^{-6}+3.49394854\text{×}10^{-08}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -5.9728e-08 1.1901e-08 -5.8374e-13 5.2507e-07 5.712e-10 0.13665
nd: 1.651600
Vd: 58.571700
density: 3.3 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.6e-06 K-1
dPgF: -0.0045
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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