Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK61
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.96883578-0.0137037464λ^{2}+0.0224806873λ^{-2}+0.00013022706λ^{-4}+3.52478352\text{×}10^{-05}λ^{-6}-1.34827056\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.47e-06 1.55e-08 -6.52e-11 4.66e-07 6.39e-10 0.22
nd: 1.740999
Vd: 52.676196
glass_code: 741526
density: 4.1 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.2e-06 K-1
dPgF: -0.0096
climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets