Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaK9
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.8065086-0.012084694λ^{2}+0.018509723λ^{-2}+0.00045689652λ^{-4}-1.5275984\text{×}10^{-05}λ^{-6}+1.0018509\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -3.41e-06 2.03e-08 -1.26e-10 4.75e-07 9.33e-11 0.17
nd: 1.69100
Vd: 54.8
glass_code: 691548
density: 4.06 g/cm3
thermal_expansion:
- temperature_range: 20 300 °C
coefficient: 8.6e-06 K-1
dPgF: -0.004
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