Optical constants of SUMITA - LaFK
K-LaFK58
Wavelength:
µm
(0.270–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.8262394-0.012783119λ^{2}+0.017254526λ^{-2}+0.00043487714λ^{-4}-1.9342271\text{×}10^{-05}λ^{-6}+1.18082\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -4.73e-06 9.33e-09 -1.14e-10 4.36e-07 4.83e-10 0.169
nd: 1.69560
Vd: 59.0
glass_code: 696590
density: 4.56 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.9e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.3e-06 K-1
dPgF: -0.0019
climatic_resistance: 1.0
acid_resistance: 4.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book