Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK53A
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.21007394λ^2}{λ^2-0.00521679919}+\frac{1.19495815λ^2}{λ^2-83.5557501}+\frac{0.806533246λ^2}{λ^2-0.02008035}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.86e-06 1.36e-08 -2.33e-11 5.16e-07 5.98e-10 0.185
nd: 1.755000
Vd: 52.320574
glass_code: 755523
density: 4.39 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.2e-06 K-1
dPgF: -0.0087
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets