Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK7A
Wavelength:
µm
(0.280 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.20674811λ^2}{λ^2-84.3499012}+\frac{1.06717731λ^2}{λ^2-0.004381895}+\frac{0.811229515λ^2}{λ^2-0.018982889}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 1.82e-06 1.41e-08 -1.49e-11 4.32e-07 7.94e-10 0.207 nd: 1.713000 Vd: 53.832974 glass_code: 713538 glass_status: standard density: 3.74 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 5.5e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 7.3e-06 K-1 dPgF: -0.0088 climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets