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