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Optical constants of OHARA - LAL (Lanthanum, low-index)
S-LAL10
Wavelength:
µm
(0.31 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.52812575λ^2}{λ^2-0.00776817644}+\frac{0.367965267λ^2}{λ^2-0.0272026548}+\frac{1.11751784λ^2}{λ^2-88.86974}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.83e-06 1.07e-08 -3.51e-11 5.85e-07 6.98e-10 0.196
nd: 1.719995
Vd: 50.230564
glass_code: 720502
density: 3.86 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.6e-06 K-1
dPgF: -0.0081
climatic_resistance: 2.0
acid_resistance: 52.2
phosphate_resistance: 3.0
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets