Optical constants of OHARA - LAH (Lanthanum, high-index)
S-LAH55
Wavelength:
µm
(0.320–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.95615766λ^2}{λ^2-0.00979338965}+\frac{0.319216215λ^2}{λ^2-0.0376836296}+\frac{1.39173189λ^2}{λ^2-94.8775271}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.4e-06 1.26e-08 -2.98e-11 6.81e-07 8.19e-10 0.211 nd: 1.834807 Vd: 42.713673 glass_code: 835427 glass_status: preferred density: 4.73 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.2e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.6e-06 K-1 dPgF: -0.0082 acid_resistance: 4.0 phosphate_resistance: 1.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets