Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK51A
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.639398694λ^2}{λ^2-5.67124825\text{×}10^{-05}}+\frac{1.18748481λ^2}{λ^2-0.0158001968}+\frac{1.26545352λ^2}{λ^2-91.097053}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 8.08e-08 1.25e-08 -7.7e-12 4.99e-07 6.1e-10 0.161
nd: 1.696800
Vd: 55.526357
glass_code: 697555
glass_status: standard
density: 3.56 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.1e-06 K-1
dPgF: -0.007
climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets