Optical constants of OHARA - LAH (Lanthanum, high-index)
S-LAH54
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.2126997-0.01535137λ^{2}+0.028440374λ^{-2}+0.00079180171λ^{-4}-1.7032771\text{×}10^{-05}λ^{-6}+2.6219094\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.815e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.815543
Vd: 44.361146
glass_code: 816444
glass_status: preferred
density: 4.54 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.9e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.1e-06 K-1
dPgF: -0.0084
acid_resistance: 4.2
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