Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK12
Wavelength:
µm
(0.280 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.82673774-0.0136335725λ^{2}+0.0190474212λ^{-2}+0.000204685509λ^{-4}+8.81193052\text{×}10^{-06}λ^{-6}-2.15937861\text{×}10^{-08}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 8.75e-08 1.9e-08 -8.47e-11 4.12e-07 -1.87e-10 0.224
nd: 1.696801
Vd: 56.199825
glass_code: 697562
density: 3.71 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.4e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8e-06 K-1
dPgF: -0.01
climatic_resistance: 1.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)