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Optical constants of OHARA - LAM (Lanthanum, medium-index)
S-LAM55
Wavelength:
µm
(0.35 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.85412979λ^2}{λ^2-0.0108438152}+\frac{0.165450323λ^2}{λ^2-0.051405098}+\frac{1.27255422λ^2}{λ^2-109.986837}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.27e-06 1.14e-08 -3.64e-11 6.01e-07 7.23e-10 0.278
nd: 1.762001
Vd: 40.100176
glass_code: 762401
density: 4.22 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.4e-06 K-1
dPgF: -0.0001
climatic_resistance: 2.0
acid_resistance: 51.2
phosphate_resistance: 1.0
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets