Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK33B
Wavelength:
µm
(0.3 – 2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.42288601λ^2}{λ^2-0.00670283452}+\frac{0.593661336λ^2}{λ^2-0.021941621}+\frac{1.1613526λ^2}{λ^2-80.7407701}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 2.77e-06 1.24e-08 1.22e-11 5.19e-07 6.02e-10 0.184 nd: 1.755 Vd: 52.3 glass_code: 755523.422 glass_status: standard density: 4.221 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 5.83e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 7.06e-06 K-1 dPgF: -0.0085 climatic_resistance: 1.0 stain_resistance: 1.0 acid_resistance: 51.3 alkali_resistance: 1.0 phosphate_resistance: 2.0
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets