Optical constants of OHARA - LAM (Lanthanum, medium-index)
LAM7
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.734192λ^2}{λ^2-0.01110755}+\frac{0.2314896λ^2}{λ^2-0.05153277}+\frac{1.517096λ^2}{λ^2-163.4134}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 4.1859e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.749497 Vd: 35.278026 glass_code: 750353 glass_status: preferred density: 4.55 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.4e-06 K-1 - temperature_range: 20 300 °C coefficient: 9.4e-06 K-1 dPgF: 0.0035 acid_resistance: 5.2 phosphate_resistance: 3.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets