Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK2A
Wavelength:
µm
(0.302–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.914808038λ^2}{λ^2-82.3260698}+\frac{1.00522491λ^2}{λ^2-0.004505044}+\frac{0.803415958λ^2}{λ^2-0.018371342}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -5.16e-06 1.42e-08 -4.62e-11 5.61e-07 5.14e-10 0.155
nd: 1.692110
Vd: 54.539198
glass_code: 692545
density: 3.94 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.7e-06 K-1
dPgF: -0.0048
climatic_resistance: 2.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets