Optical constants of SUMITA - SK (Dense crown)
K-SK18
Wavelength:
µm
(0.330 – 2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.6383229-0.010806956λ^{2}+0.016153414λ^{-2}+0.00046673954λ^{-4}-2.5414619\text{×}10^{-05}λ^{-6}+1.9703165\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: -1.85e-06 1.9e-08 -1.3e-10 4.59e-07 9.89e-10 0.204 nd: 1.63854 Vd: 55.5 glass_code: 639555 density: 3.69 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 6.8e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 8.1e-06 K-1 dPgF: -0.0018 climatic_resistance: 3.0 acid_resistance: 5.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book