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
$$n^2-1=\frac{0.964886701λ^2}{λ^2-91.193933}+\frac{0.468480585λ^2}{λ^2-0.0205810529}+\frac{1.23722796λ^2}{λ^2-0.00608509423}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_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: 57.347260
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: -0.0021
climatic_resistance: 4.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets