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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK59A
Wavelength:
µm
(0.310 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.79972754-0.00873189032λ^{2}+0.0230159159λ^{-2}-0.000850193825λ^{-4}+0.000152864586λ^{-6}-6.91746601\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -5.15e-06 2.29e-08 -1.61e-10 5.25e-07 -6.63e-10 0.169
nd: 1.690999
Vd: 54.859424
glass_code: 691548
density: 3.94 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.2e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.6e-06 K-1
dPgF: -0.0052
climatic_resistance: 3.0
References
CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)