Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK11
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.09089534λ^2}{λ^2-0.00492618902}+\frac{0.628435989λ^2}{λ^2-0.0203181412}+\frac{1.01438282λ^2}{λ^2-100.530943}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.34e-06 2.38e-08 -5.5e-11 4.75e-07 6.18e-11 0.228
nd: 1.664610
Vd: 54.612239
glass_code: 665546
density: 4.02 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.2e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.8e-06 K-1
dPgF: -0.0025
climatic_resistance: 3.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets