Optical constants of SUMITA - PFK
K-PFK85(M)
Wavelength:
µm
(0.280–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.180434-0.0050369414λ^{2}+0.007415342λ^{-2}+0.000191031λ^{-4}-1.3017551\text{×}10^{-05}λ^{-6}+6.1457339\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.28e-05 -1.71e-09 6.72e-11 3.39e-07 4.74e-10 0.176
nd: 1.48375
Vd: 85.0
glass_code: 486852
density: 3.97 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.29e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.63e-05 K-1
dPgF: 0.0388
climatic_resistance: 1.0
acid_resistance: 1.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book