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Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaK6

Wavelength: µm
 (0.300 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.6532657-0.011570116λ^{2}+0.015955637λ^{-2}+0.00023811283λ^{-4}+1.7165459\text{×}10^{-05}λ^{-6}-1.4129709\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -2.11e-06 1.88e-08 -1.93e-10 4.01e-07 3.43e-10 0.195
n_d: 1.64250
V_d: 58.1
glass_code: 643581
density: 3.76 g/cm3
coefficient_of_thermal_expansion_1: 6.2e-06 K-1
coefficient_of_thermal_expansion_2: 7.9e-06 K-1
ΔP_gF: -0.0014
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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