Optical constants of CDGM - ZLAF (Dense lanthanum flint)
D-ZLAF61-25
Wavelength:
µm
(0.340–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.384732155λ^2}{λ^2-0.0355326885}+\frac{1.8424092λ^2}{λ^2-0.00916902591}+\frac{1.21280764λ^2}{λ^2-95.9091697}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.38e-06 1.46e-08 -1.77e-11 7.39e-07 6.32e-10 0.229
nd: 1.821310
Vd: 42.674895
glass_code: 821427
density: 4.92 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.5e-06 K-1
dPgF: -0.0068
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