Optical constants of SUMITA - LaFK
K-LaFK50T(M)
Wavelength:
µm
(0.300–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.0365333-0.012640924λ^{2}+0.023542665λ^{-2}+0.00054022154λ^{-4}+3.5952261\text{×}10^{-06}λ^{-6}-3.549746\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.67e-06 1.57e-08 -3.04e-10 6.28e-07 3.17e-10 0.192 nd: 1.76209 Vd: 49.6 glass_code: 766498 density: 4.75 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.3e-06 K-1 - temperature_range: 20 300 °C coefficient: 8.1e-06 K-1 dPgF: -0.0068 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