Optical constants of OHARA - LAL (Lanthanum, low-index)
L-LAL12
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.28516283λ^2}{λ^2-0.00641062082}+\frac{0.478333797λ^2}{λ^2-0.0214815099}+\frac{1.21605301λ^2}{λ^2-100.243378}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 3.27e-07 8.14e-09 -3.58e-11 5.41e-07 7.88e-10 0.181 nd: 1.677900 Vd: 54.887440 glass_code: 678549 glass_status: special density: 3.48 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.6e-06 K-1 - temperature_range: 20 300 °C coefficient: 9e-06 K-1 dPgF: -0.0069 climatic_resistance: 3.0 acid_resistance: 53.2 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