Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK10
Wavelength:
µm
(0.35 – 2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.72878017λ^2}{λ^2-0.00886014635}+\frac{0.169257825λ^2}{λ^2-0.0363416509}+\frac{1.19386956λ^2}{λ^2-82.9009069}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 4.1e-06 1.23e-08 -7.85e-12 5.08e-07 5.76e-10 0.205 nd: 1.72003 Vd: 50.62 glass_code: 720506.369 glass_status: standard density: 3.689 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 5.68e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 6.83e-06 K-1 dPgF: -0.0072 climatic_resistance: 2.0 stain_resistance: 2.0 acid_resistance: 52.3 alkali_resistance: 1.0 phosphate_resistance: 3.0
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets