Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK52-25
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.04345567λ^2}{λ^2-0.017366945}+\frac{0.888612736λ^2}{λ^2-0.00301494124}+\frac{1.2310265λ^2}{λ^2-87.1255673}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.8e-06 1.72e-08 -5.24e-11 4.52e-07 1.37e-10 0.229
nd: 1.729240
Vd: 53.851219
glass_code: 729539
density: 4.0 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.8e-06 K-1
dPgF: -0.0084
climatic_resistance: 1.0
Comments
anneal rate:25°C/h
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets