Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK12
Wavelength:
µm
(0.32–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.17365704λ^2}{λ^2-0.00577031797}+\frac{0.588992398λ^2}{λ^2-0.0200401678}+\frac{0.978014394λ^2}{λ^2-95.4873482}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -5.67e-06 8.27e-09 1.27e-12 5.25e-07 6.3e-10 0.162 nd: 1.6779 Vd: 55.2 glass_code: 678552.410 glass_status: standard density: 4.1 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.6e-06 K-1 - temperature_range: 20 300 °C coefficient: 9.3e-06 K-1 dPgF: -0.0024 climatic_resistance: 3.0 stain_resistance: 1.0 acid_resistance: 53.3 alkali_resistance: 3.3 phosphate_resistance: 4.3
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets