Optical constants of CDGM - ZLAF (Dense lanthanum flint)
H-ZLAF90
Wavelength:
µm
(0.370–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.494167183λ^2}{λ^2-0.0602358038}+\frac{2.31375143λ^2}{λ^2-0.0137149187}+\frac{2.2792987λ^2}{λ^2-148.088436}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.2e-06 1.4e-08 -1.91e-11 1.04e-06 1.38e-09 0.29
nd: 2.000690
Vd: 25.425752
density: 4.74 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.7e-06 K-1
dPgF: 0.0117
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets