Optical constants of SUMITA - LaFK
K-LaFK60(M)
Wavelength:
µm
(0.270–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.6117274-0.01021392λ^{2}+0.014472638λ^{-2}+0.00020938021λ^{-4}+2.8785693\text{×}10^{-06}λ^{-6}-9.063171\text{×}10^{-08}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -9.6e-06 1.03e-08 -7.48e-11 3.87e-07 1.56e-10 0.188
nd: 1.62848
Vd: 63.2
glass_code: 632638
density: 4.29 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 9.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 1.14e-05 K-1
dPgF: 0.0031
climatic_resistance: 1.0
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