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Optical constants of HIKARI - LaK (Lanthanum crown)
Q-LAK13S

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.82409056-0.0116215301λ^{2}-0.000136188911λ^{4}+0.0199712048λ^{-2}+0.000284067118λ^{-4}+7.76179707\text{×}10^{-06}λ^{-6}+6.22423374\text{×}10^{-08}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.4813e-06 1.5502e-08 -1.8528e-12 8.5107e-07 7.0734e-10 0.17132
n_d: 1.697200
V_d: 53.288704
glass_status: preferred
density: 3.74 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.1e-06 K-1
ΔP_gF: -0.0067
phosphate_resistance: 4.0

Comments

For mold lens

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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