Optical constants of SUMITA - SK (Dense crown)
K-SK15
Wavelength:
µm
(0.290–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.5918508-0.010567563λ^{2}+0.014411695λ^{-2}+0.00063226961λ^{-4}-5.7927037\text{×}10^{-05}λ^{-6}+3.4193172\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.08e-06 1.69e-08 -2.15e-10 4.4e-07 6.37e-10 0.19
nd: 1.62299
Vd: 58.1
glass_code: 623581
density: 3.67 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8e-06 K-1
dPgF: -0.0023
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