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Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaKn11

Wavelength: µm
 (0.330 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.6994624-0.011441236λ^{2}+0.017672891λ^{-2}+0.00039604649λ^{-4}-3.5739234\text{×}10^{-06}λ^{-6}+7.0861608\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -2.99e-07 1.21e-08 -1.58e-10 5.15e-07 8.57e-10 0.196
n_d: 1.65830
V_d: 53.4
glass_code: 658534
density: 3.75 g/cm3
  - temperature_range: 20 300 °C
    coefficient: 8.2e-06 K-1
ΔP_gF: -0.0014
climatic_resistance: 1.0
acid_resistance: 1.0

References

SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

SUMITA Optical Glass, Inc.

SUMITA Optical Glass, Inc. is a Japanese glass manufacturer

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