Optical constants of SCHOTT - LaK (Lanthanum crown)
LAKL12
Wavelength:
µm
(0.32–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.28115389λ^2}{λ^2-0.00636439821}+\frac{0.482607607λ^2}{λ^2-0.0213764262}+\frac{1.16553538λ^2}{λ^2-93.2771532}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.26e-06 1.05e-08 -8.4e-12 4.57e-07 5.86e-10 0.21 nd: 1.6779 Vd: 54.92 glass_code: 678549.332 glass_status: preferred density: 3.32 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.8e-06 K-1 - temperature_range: 20 300 °C coefficient: 8e-06 K-1 dPgF: -0.0062 climatic_resistance: 3.0 stain_resistance: 3.0 acid_resistance: 53.3 alkali_resistance: 2.2 phosphate_resistance: 3.3
Comments
was replaced by N-LAK12
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets