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Optical constants of SUMITA - GFK
K-GFK70

Wavelength: µm
 (0.280 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.4293935-0.0057591097λ^{2}+0.011512013λ^{-2}+0.0001324924λ^{-4}+7.3250033\text{×}10^{-06}λ^{-6}-5.7195445\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -2.47e-05 -1.68e-09 -2.49e-11 3.77e-07 3.45e-10 0.178
n_d: 1.56907
V_d: 71.3
glass_code: 569713
density: 4.46 g/cm3
coefficient_of_thermal_expansion_1: 1.32e-05 K-1
coefficient_of_thermal_expansion_2: 1.56e-05 K-1
ΔP_gF: 0.0207
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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