Optical constants of OHARA - LAM (Lanthanum, medium-index)
LAM58
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.704423λ^2}{λ^2-0.01024939}+\frac{0.1778568λ^2}{λ^2-0.04576819}+\frac{1.425726λ^2}{λ^2-153.5267}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 7.5415e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.720000
Vd: 41.989859
glass_code: 720420
glass_status: preferred
density: 4.26 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.7e-06 K-1
dPgF: -0.0009
acid_resistance: 5.2
phosphate_resistance: 1.2
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets