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Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaKn2

Wavelength: µm
 (0.290 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.6498456-0.013078949λ^{2}+0.014887079λ^{-2}+0.0003621869λ^{-4}-1.1506273\text{×}10^{-05}λ^{-6}+6.1300945\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -2.24e-06 1.48e-08 -2.56e-10 3.66e-07 4.69e-10 0.182
n_d: 1.64050
V_d: 60.1
glass_code: 641601
density: 3.66 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.9e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8e-06 K-1
ΔP_gF: -0.0029
climatic_resistance: 1.0
acid_resistance: 5.0

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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