Optical constants of SUMITA - LaFK
K-LaFK65
Wavelength:
µm
(0.270–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.7016579-0.011617767λ^{2}+0.015597681λ^{-2}+0.00019111207λ^{-4}+1.132323\text{×}10^{-05}λ^{-6}-5.9630893\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -7.58e-06 9.42e-09 -3.47e-11 3.97e-07 4.24e-10 0.182
nd: 1.65670
Vd: 62.3
glass_code: 657623
density: 4.36 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 1.03e-05 K-1
dPgF: 0.0026
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