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
$$n^2-1=\frac{1.63613242λ^2}{λ^2-0.00869769737}+\frac{0.169161636λ^2}{λ^2-0.0295057126}+\frac{0.929984618λ^2}{λ^2-82.4994109}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -5.25e-06 1.39e-08 -3.66e-11 5.03e-07 5.22e-10 0.184
nd: 1.691000
Vd: 54.815309
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 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets