Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK70
Wavelength:
µm
(0.280 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.73281949-0.0114137973λ^{2}+0.0202755954λ^{-2}-0.000478308953λ^{-4}+0.000110158258λ^{-6}-5.30283301\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.85e-06 2.21e-08 -1.31e-10 4.54e-07 5.36e-10 0.235
nd: 1.669102
Vd: 55.402300
glass_code: 669554
density: 3.35 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.1e-06 K-1
dPgF: -0.006
climatic_resistance: 1.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)