Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF050-25
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.22950343λ^2}{λ^2-87.307119}+\frac{0.641767823λ^2}{λ^2-0.023765216}+\frac{1.41136391λ^2}{λ^2-0.006459327}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.01e-06 1.55e-08 -3.41e-11 5.74e-07 4.46e-10 0.215
nd: 1.767090
Vd: 49.197491
glass_code: 767492
density: 4.51 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.4e-06 K-1
dPgF: -0.0095
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