Optical constants of OHARA - LAM (Lanthanum, medium-index)
LAM51
Wavelength:
µm
(0.365–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.830675-0.01254193λ^{2}+0.01928173λ^{-2}+0.00113639λ^{-4}-8.838415\text{×}10^{-05}λ^{-6}+5.822869\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.8618e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.699998
Vd: 48.078869
glass_code: 700481
glass_status: preferred
density: 4.09 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.8e-06 K-1
dPgF: -0.0016
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets