Optical constants of CDGM - ZLAF (Dense lanthanum flint)
D-ZLAF81-25
Wavelength:
µm
(0.340–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.90958888λ^2}{λ^2-0.0102182926}+\frac{0.266893034λ^2}{λ^2-0.0421328894}+\frac{1.26585975λ^2}{λ^2-97.0733228}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 5.18e-06 1.52e-08 1.59e-10 5.99e-07 9.97e-11 0.282
nd: 1.807570
Vd: 40.973340
glass_code: 808410
density: 4.55 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: -0.006
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