Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK3
Wavelength:
µm
(0.320–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.27801447λ^2}{λ^2-90.6830082}+\frac{1.19473815λ^2}{λ^2-0.0181704833}+\frac{0.793028102λ^2}{λ^2-0.00108737276}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
nd: 1.746930
Vd: 50.950085
glass_code: 747510
density: 4.08 g/cm3
thermal_expansion:
- temperature_range: -30 70 ℃
coefficient: 6e-06 K-1
- temperature_range: 20 300 ℃
coefficient: 7.4e-06 K-1
dPgF: -0.0085
climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets