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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK1
Wavelength:
µm
(0.290 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.70432455-0.0100067787λ^{2}+0.018102254λ^{-2}-2.16494884\text{×}10^{-05}λ^{-4}+3.81507477\text{×}10^{-05}λ^{-6}-1.57874424\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -5.01e-06 2.49e-08 -4.65e-11 5.72e-07 -7.93e-10 0.06
nd: 1.659500
Vd: 57.385393
glass_code: 660574
density: 3.94 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.7e-06 K-1
dPgF: -0.0037
climatic_resistance: 4.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)