Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK67
Wavelength:
µm
(0.300–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.7410828-0.016285022λ^{2}+0.015866919λ^{-2}+0.0010819231λ^{-4}-7.7131038\text{×}10^{-05}λ^{-6}+4.033333\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
nd: 1.670003
Vd: 51.758578
glass_code: 670517
density: 3.73 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.4e-06 K-1
dPgF: -0.004
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets