Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK4L
Wavelength:
µm
(0.280 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.64769834-0.0137710798λ^{2}+0.015665045λ^{-2}+9.82676335\text{×}10^{-05}λ^{-4}+2.2112348\text{×}10^{-05}λ^{-6}-1.07455498\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.06e-06 1.84e-08 -7.4e-11 2.79e-07 6.19e-10 0.275
nd: 1.640002
Vd: 60.213997
glass_code: 640602
density: 2.99 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.8e-06 K-1
dPgF: -0.0062
climatic_resistance: 3.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)