Optical constants of OHARA - LAL (Lanthanum, low-index)
L-LAL15
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.07959634λ^2}{λ^2-0.00470047543}+\frac{0.731872134λ^2}{λ^2-0.0198615758}+\frac{1.17111107λ^2}{λ^2-87.03599}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 9.24e-06 1.32e-08 -3.57e-11 5.77e-07 5.66e-10 0.206 nd: 1.693040 Vd: 52.930600 density: 3.66 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.4e-06 K-1 dPgF: -0.0091 climatic_resistance: 3.0 acid_resistance: 53.0 phosphate_resistance: 4.0
Comments
Low Softening Temperature
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets