Optical constants of OHARA - LAM (Lanthanum, medium-index)
LAM61
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.706024λ^2}{λ^2-0.009579771}+\frac{0.182716λ^2}{λ^2-0.04044097}+\frac{1.204833λ^2}{λ^2-127.571}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.7708e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.720002
Vd: 46.035166
glass_code: 720460
glass_status: preferred
density: 4.28 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.5e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.6e-06 K-1
dPgF: -0.002
acid_resistance: 53.2
phosphate_resistance: 3.2
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets