Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK6-25
Wavelength:
µm
(0.300–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.22299893λ^2}{λ^2-94.0859262}+\frac{0.471209941λ^2}{λ^2-0.0227830104}+\frac{1.33928922λ^2}{λ^2-0.00665285316}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.33e-06 1.27e-08 -2.36e-11 5.62e-07 7.08e-10 0.199
nd: 1.692810
Vd: 53.049215
glass_code: 693531
density: 3.5 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.5e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.5e-06 K-1
dPgF: -0.0083
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