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Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaKn14

Wavelength: µm
 (0.280 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.9713549-0.015047149λ^{2}+0.020748381λ^{-2}+0.00068239287λ^{-4}-4.5897244\text{×}10^{-05}λ^{-6}+3.0151479\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.61e-06 1.71e-08 -9.82e-11 5.38e-07 2.35e-11 0.138
n_d: 1.74100
V_d: 52.7
glass_code: 741527
density: 4.31 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.8e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.4e-06 K-1
ΔP_gF: -0.0095
acid_resistance: 4.0

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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