Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK1
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.964886701λ^2}{λ^2-91.193933}+\frac{0.468480585λ^2}{λ^2-0.0205810529}+\frac{1.23722796λ^2}{λ^2-0.00608509423}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -5.01e-06 2.49e-08 -4.65e-11 5.72e-07 -7.93e-10 0.06 nd: 1.659500 Vd: 57.347260 glass_code: 660574 density: 3.94 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.7e-06 K-1 - temperature_range: 20 300 °C coefficient: 8.7e-06 K-1 dPgF: -0.0021 climatic_resistance: 4.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets