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Optical constants of OHARA - LAH (Lanthanum, high-index)
S-LAH88
Wavelength:
µm
(0.350 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{2.1284434λ^2}{λ^2-0.0117309815}+\frac{0.405082139λ^2}{λ^2-0.0508706599}+\frac{1.67918461λ^2}{λ^2-107.091456}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.66e-06 1.07e-08 -2.33e-11 9.1e-07 1.07e-09 0.262
nd: 1.916499
Vd: 31.604148
density: 4.74 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.7e-06 K-1
dPgF: 0.0008
climatic_resistance: 1.0
acid_resistance: 3.2
phosphate_resistance: 1.1
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets