Optical constants of SUMITA - SK (Dense crown)
K-SK18RH
Wavelength:
µm
(0.300–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.6368942-0.00998234λ^{2}+0.017151413λ^{-2}+0.00011644223λ^{-4}+3.4189945\text{×}10^{-05}λ^{-6}-1.8645959\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.1e-06 1.41e-08 -2.56e-10 4.99e-07 4.12e-10 0.193
nd: 1.63854
Vd: 55.5
glass_code: 639555
density: 3.35 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.4e-06 K-1
dPgF: -0.0008
climatic_resistance: 1.0
acid_resistance: 3.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book