Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK54
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.20772937λ^2}{λ^2-0.0176389155}+\frac{0.737418371λ^2}{λ^2-0.000666515982}+\frac{1.35749026λ^2}{λ^2-96.9938806}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 5.91e-06 1.71e-08 -2.96e-11 5.65e-07 5.05e-10 0.196
nd: 1.734000
Vd: 51.485829
glass_code: 734515
density: 4.01 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.4e-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