Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK22
Wavelength:
µm
(0.31–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.14229781λ^2}{λ^2-0.00585778594}+\frac{0.535138441λ^2}{λ^2-0.0198546147}+\frac{1.04088385λ^2}{λ^2-100.834017}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 1.36e-06 1.49e-08 -1.29e-11 3.41e-07 2.09e-10 0.262 nd: 1.65113 Vd: 55.89 glass_code: 651559.377 glass_status: standard density: 3.768 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.6e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.4e-06 K-1 dPgF: -0.0031 climatic_resistance: 2.0 stain_resistance: 2.0 acid_resistance: 51.2 alkali_resistance: 1.0 phosphate_resistance: 2.3
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets