Optical constants of SUMITA - SKF
K-SKF6(M)
Wavelength:
µm
(0.320 – 2.000)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=2.2407767-0.008821111λ^{2}+0.011852627λ^{-2}+0.00046630703λ^{-4}-2.7146793\text{×}10^{-05}λ^{-6}+2.5187584\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -9.67e-06 1.6e-08 -1.08e-10 4.97e-07 6.44e-11 0.231
n_d: 1.50847
V_d: 52.6
glass_code: 512521
density: 2.51 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 9.5e-06 K-1
- temperature_range: 20 300 °C
coefficient: 1e-05 K-1
ΔP_gF: 0.0043
climatic_resistance: 1.0
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