Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK8A
Wavelength:
µm
(0.302 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.13861881λ^2}{λ^2-80.074466}+\frac{0.158050538λ^2}{λ^2-0.0368197669}+\frac{1.73934635λ^2}{λ^2-0.00909531981}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.02e-06 1.82e-08 -1.04e-10 4.87e-07 9.07e-10 0.216
nd: 1.720000
Vd: 50.343857
glass_code: 720503
density: 3.77 g/cm3
thermal_expansion:
- temperature_range: -30 70 ℃
coefficient: 5.3e-06 K-1
- temperature_range: 20 300 ℃
coefficient: 7.2e-06 K-1
dPgF: -0.0086
climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets