Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF50
Wavelength:
µm
(0.300–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.34473873λ^2}{λ^2-0.006036194}+\frac{1.13288204λ^2}{λ^2-95.5213185}+\frac{0.731048914λ^2}{λ^2-0.022706198}$$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: 1.774000
Vd: 49.590362
glass_code: 774496
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: -0.0065
climatic_resistance: 1.0
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