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Optical constants of OHARA - LAM (Lanthanum, medium-index)
L-LAM72
Wavelength:
µm
(0.29 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.50483297λ^2}{λ^2-0.0075034233}+\frac{0.433346414λ^2}{λ^2-0.026900952}+\frac{1.2714921λ^2}{λ^2-95.7631272}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
nd: 1.733099
Vd: 48.896607
glass_code: 733489
glass_status: special
density: 3.89 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8e-06 K-1
dPgF: -0.0093
climatic_resistance: 3.0
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