Optical constants of SUMITA - SK (Dense crown)
K-SK7
Wavelength:
µm
(0.290–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.5429277-0.01031719λ^{2}+0.014356944λ^{-2}+0.00031433872λ^{-4}-1.0824341\text{×}10^{-05}λ^{-6}+6.8100892\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.39e-07 1.74e-08 -2.81e-10 4.14e-07 1.06e-09 0.188
nd: 1.60729
Vd: 59.5
glass_code: 607595
density: 3.5 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.7e-06 K-1
dPgF: -0.0001
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