Optical constants of OHARA - LAL (Lanthanum, low-index)
LAL58
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.53415λ^2}{λ^2-0.008014497}+\frac{0.2744946λ^2}{λ^2-0.03023701}+\frac{1.210527λ^2}{λ^2-118.7442}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 25.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: -1.2389e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.693495 Vd: 50.807634 glass_code: 694508 glass_status: preferred density: 4.11 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 7.8e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 9.1e-06 K-1 dPgF: -0.0036 acid_resistance: 53.2 phosphate_resistance: 4.2
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets