Optical constants of OHARA - LAH (Lanthanum, high-index)
LAH78
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{2.08122726λ^2}{λ^2-0.011190641}+\frac{0.398632407λ^2}{λ^2-0.0521753272}+\frac{2.21679491λ^2}{λ^2-141.893166}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 7.34e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.901355 Vd: 31.550244 glass_code: 901315 glass_status: preferred density: 4.48 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.4e-06 K-1 dPgF: 0.0042 acid_resistance: 3.0 phosphate_resistance: 1.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets