Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF79
Wavelength:
µm
(0.340–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.26530456λ^2}{λ^2-0.0420844203}+\frac{1.45255299λ^2}{λ^2-117.349274}+\frac{1.65170478λ^2}{λ^2-0.00935611552}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
nd: 1.730770
Vd: 40.508021
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: -0.0047
climatic_resistance: 3.0
Comments
anneal rate:4°C/h
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets