Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF53-25
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.32239317λ^2}{λ^2-0.00606224219}+\frac{0.646347208λ^2}{λ^2-0.0234824415}+\frac{1.17507569λ^2}{λ^2-87.8164211}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 7.67e-06 2.36e-08 -1.95e-10 6.35e-07 3.67e-10 0.208
nd: 1.742100
Vd: 49.246024
glass_code: 742493
density: 4.26 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.2e-06 K-1
dPgF: -0.009
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