Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK9
Wavelength:
µm
(0.3–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.46231905λ^2}{λ^2-0.00724270156}+\frac{0.344399589λ^2}{λ^2-0.0243353131}+\frac{1.15508372λ^2}{λ^2-85.4686868}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.11e-06 1.11e-08 1.82e-12 4.74e-07 -3.47e-10 0.146 nd: 1.691 Vd: 54.71 glass_code: 691547.351 glass_status: standard density: 3.51 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.3e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.5e-06 K-1 dPgF: -0.0071 climatic_resistance: 3.0 stain_resistance: 3.0 acid_resistance: 52.0 alkali_resistance: 1.2 phosphate_resistance: 4.3
Comments
step 0.5 available
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets