Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK52
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.648528792λ^2}{λ^2-0.000165816179}+\frac{1.28450424λ^2}{λ^2-0.0158113883}+\frac{1.23774593λ^2}{λ^2-85.7406109}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 6.32e-07 1.75e-08 -2.89e-11 5e-07 3.79e-10 0.163 nd: 1.729160 Vd: 54.684737 glass_code: 729547 glass_status: standard density: 4.02 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 5.6e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 7.2e-06 K-1 dPgF: -0.0078 climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets