Optical constants of OHARA - LAM (Lanthanum, medium-index)
LAM59
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.626945λ^2}{λ^2-0.008757497}+\frac{0.1906681λ^2}{λ^2-0.03779724}+\frac{1.281079λ^2}{λ^2-123.7784}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -5.171e-07 0.0 0.0 0.0 0.0 0.0 nd: 1.697002 Vd: 48.535864 glass_code: 697485 glass_status: preferred density: 4.06 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.5e-06 K-1 - temperature_range: 20 300 °C coefficient: 9e-06 K-1 dPgF: -0.0019 acid_resistance: 53.2 phosphate_resistance: 3.2
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets