Optical constants of OHARA - LAH (Lanthanum, high-index)
L-LAH91
Wavelength:
µm
(0.28–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.26144128λ^2}{λ^2-0.00572512582}+\frac{0.782115273λ^2}{λ^2-0.0219829752}+\frac{1.15823645λ^2}{λ^2-88.04822}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 7.54e-06 1.03e-08 1.85e-11 6.57e-07 6.38e-10 0.204 nd: 1.764500 Vd: 49.096913 density: 4.29 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.7e-06 K-1 dPgF: -0.0092 climatic_resistance: 2.0 acid_resistance: 52.2 phosphate_resistance: 2.0
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