Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK8B
Wavelength:
µm
(0.302–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.55351121λ^2}{λ^2-0.00793041249}+\frac{0.342243754λ^2}{λ^2-0.0280174591}+\frac{1.07011974λ^2}{λ^2-90.2590858}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -2.05e-07 1.37e-08 -3.29e-11 4.91e-07 6.32e-10 0.249 nd: 1.720000 Vd: 50.280736 glass_code: 720503 density: 3.88 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.6e-06 K-1 - temperature_range: 20 300 °C coefficient: 9.1e-06 K-1 dPgF: -0.0068 climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets