Optical constants of SUMITA - PFK
K-PFK90
Wavelength:
µm
(0.270–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.1094643-0.0048026812λ^{2}+0.0067645351λ^{-2}+8.3329962\text{×}10^{-05}λ^{-4}+3.4196126\text{×}10^{-07}λ^{-6}-8.4933854\text{×}10^{-08}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.23e-05 -2.13e-09 9.79e-11 2.57e-07 -1.68e-10 0.221
nd: 1.45880
Vd: 90.0
glass_code: 459900
density: 3.72 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.37e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.65e-05 K-1
dPgF: 0.0442
climatic_resistance: 1.0
acid_resistance: 2.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book