Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK7
Wavelength:
µm
(0.29–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.23679889λ^2}{λ^2-0.00610105538}+\frac{0.445051837λ^2}{λ^2-0.0201388334}+\frac{1.01745888λ^2}{λ^2-90.638038}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -3.4e-06 1.17e-08 2.38e-11 4.96e-07 4.44e-10 0.107 nd: 1.6516 Vd: 58.52 glass_code: 652585.384 glass_status: standard density: 3.84 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.1e-06 K-1 - temperature_range: 20 300 °C coefficient: 8.2e-06 K-1 dPgF: -0.0021 climatic_resistance: 3.0 stain_resistance: 2.0 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