Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK4L
Wavelength:
µm
(0.280 – 2.400)
Derived optical constants
n
k
logX
logY
eV
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_is_absolute: false λ_is_vacuum: false temperature: 20.0 °C coefficients_of_thermal_dispersion: 1.06e-06 1.84e-08 -7.4e-11 2.79e-07 6.19e-10 0.275 n_d: 1.640002 V_d: 60.213997 glass_code: 640602 density: 2.99 g/cm3 coefficient_of_thermal_expansion_1: 6e-06 K-1 coefficient_of_thermal_expansion_2: 7.8e-06 K-1 ΔP_gF: -0.0062 climatic_resistance: 3.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)