Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF50-25
Wavelength:
µm
(0.300–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.734700246λ^2}{λ^2-0.022666746}+\frac{1.33716574λ^2}{λ^2-0.006016769}+\frac{1.13513348λ^2}{λ^2-95.7512696}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.53e-06 1.43e-08 -3.83e-11 5.87e-07 4.1e-10 0.222
nd: 1.772880
Vd: 49.519338
glass_code: 773495
glass_status: standard
density: 4.93 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.9e-06 K-1
dPgF: -0.0066
climatic_resistance: 1.0
Comments
anneal rate:25°C/h
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets