Optical constants of OHARA - LAL (Lanthanum, low-index)
S-LAL9
Wavelength:
µm
(0.29–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.16195687λ^2}{λ^2-0.0159659509}+\frac{0.644860099λ^2}{λ^2-0.000505502467}+\frac{1.25062221λ^2}{λ^2-93.8284169}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 3.38e-06 1.14e-08 -3.54e-11 3.51e-07 3.25e-10 0.264 nd: 1.691002 Vd: 54.822578 glass_code: 691548 density: 3.63 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.1e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.4e-06 K-1 dPgF: -0.0079 climatic_resistance: 2.0 acid_resistance: 52.0 phosphate_resistance: 4.0
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets