Optical constants of OHARA - LAH (Lanthanum, high-index)
L-LAH81
Wavelength:
µm
(0.34–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.89927344λ^2}{λ^2-0.0102901828}+\frac{0.270978866λ^2}{λ^2-0.0424227173}+\frac{1.33163819λ^2}{λ^2-100.967566}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 7.78e-06 1.14e-08 -1.69e-11 7.56e-07 7.92e-10 0.241
nd: 1.806100
Vd: 40.400738
glass_code: 806404
glass_status: special
density: 4.53 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.3e-06 K-1
dPgF: -0.0057
climatic_resistance: 2.0
acid_resistance: 51.2
phosphate_resistance: 1.2
Comments
Low Softening Temperature
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets