Optical constants of SUMITA - SK (Dense crown)
K-SK4
Wavelength:
µm
(0.280–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.5587726-0.0098095616λ^{2}+0.014840563λ^{-2}+0.0003193166λ^{-4}-1.016436\text{×}10^{-05}λ^{-6}+6.6518794\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.04e-07 1.86e-08 -3.68e-10 4.13e-07 4.69e-10 0.197
nd: 1.61272
Vd: 58.6
glass_code: 613586
density: 3.58 g/cm3
thermal_expansion:
- temperature_range: -30 70 ℃
coefficient: 6.1e-06 K-1
- temperature_range: 20 300 ℃
coefficient: 7.6e-06 K-1
dPgF: -0.0006
climatic_resistance: 3.0
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