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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK8A
Wavelength:
µm
(0.320 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.89697306-0.0143738053λ^{2}+0.0222280432λ^{-2}+0.000105067282λ^{-4}+5.16989124\text{×}10^{-05}λ^{-6}-1.90417816\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.02e-06 1.82e-08 -1.04e-10 4.87e-07 9.07e-10 0.216
nd: 1.720000
Vd: 50.351963
glass_code: 720503
glass_status: preferred
density: 3.77 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.2e-06 K-1
dPgF: -0.0071
climatic_resistance: 1.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)