Optical constants of CDGM - ZLAF (Dense lanthanum flint)
H-ZLAF55D
Wavelength:
µm
(0.320–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.227765275λ^2}{λ^2-0.0412221798}+\frac{2.04686906λ^2}{λ^2-0.010748949}+\frac{1.20888928λ^2}{λ^2-87.8518998}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.05e-06 1.59e-08 -2.67e-11 6.94e-07 2.64e-10 0.221
nd: 1.834810
Vd: 42.725177
glass_code: 835427
glass_status: standard
density: 4.56 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.4e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.1e-06 K-1
dPgF: -0.0086
climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets