Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF79
Wavelength:
µm
(0.340 – 2.400)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=2.9216709-0.016405602λ^{2}+0.024564777λ^{-2}+0.0010630152λ^{-4}-3.3184678\text{×}10^{-05}λ^{-6}+4.2899849\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
nd: 1.730774
Vd: 40.525060
glass_code: 731405
density: 3.21 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 9e-06 K-1
- temperature_range: 20 300 °C
coefficient: 1.11e-05 K-1
dPgF: -0.0041
climatic_resistance: 3.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)