Optical constants of OHARA - LAH (Lanthanum, high-index)
S-LAH67
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.1439609-0.015541721λ^{2}+0.026648169λ^{-2}+0.00077813143λ^{-4}-1.9462248\text{×}10^{-05}λ^{-6}+2.4668548\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.95e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.794997
Vd: 45.293967
glass_code: 795453
glass_status: preferred
density: 4.29 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 6.9e-06 K-1
dPgF: -0.0083
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