Optical constants of OHARA - LAL (Lanthanum, low-index)
S-LAL20
Wavelength:
µm
(0.300–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.06788467λ^2}{λ^2-0.00518896058}+\frac{0.75873535λ^2}{λ^2-0.0204004357}+\frac{1.02804682λ^2}{λ^2-120.82632}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -6.99e-06 8.4e-09 -7.12e-12 6.14e-07 5.44e-10 0.202 nd: 1.699300 Vd: 51.112184 density: 4.38 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 9e-06 K-1 dPgF: -0.0036 climatic_resistance: 1.0 acid_resistance: 53.1 phosphate_resistance: 4.2
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets