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Optical constants of SUMITA - LaFK
K-LaFK50(M)

Wavelength: µm
 (0.280 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.0568421-0.011998981λ^{2}+0.024194996λ^{-2}+0.0004815051λ^{-4}+2.2084112\text{×}10^{-06}λ^{-6}+4.3040075\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -3.11e-07 1.35e-08 -2.34e-10 5.76e-07 8.89e-10 0.201
n_d: 1.76831
V_d: 49.7
glass_code: 772500
density: 5.2 g/cm3
coefficient_of_thermal_expansion_1: 7.3e-06 K-1
coefficient_of_thermal_expansion_2: 9e-06 K-1
ΔP_gF: -0.0056
climatic_resistance: 1.0
acid_resistance: 3.0

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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