Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaKn11
Wavelength:
µm
(0.330–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.6994624-0.011441236λ^{2}+0.017672891λ^{-2}+0.00039604649λ^{-4}-3.5739234\text{×}10^{-06}λ^{-6}+7.0861608\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.99e-07 1.21e-08 -1.58e-10 5.15e-07 8.57e-10 0.196
nd: 1.65830
Vd: 53.4
glass_code: 658534
density: 3.75 g/cm3
thermal_expansion:
- temperature_range: 20 300 °C
coefficient: 8.2e-06 K-1
dPgF: -0.0014
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