Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK33A
Wavelength:
µm
(0.32–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.44116999λ^2}{λ^2-0.00680933877}+\frac{0.571749501λ^2}{λ^2-0.0222291824}+\frac{1.16605226λ^2}{λ^2-80.9379555}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.63e-06 1.11e-08 -3.92e-12 5.02e-07 5.08e-10 0.188
nd: 1.75393
Vd: 52.27
glass_code: 754523.422
glass_status: special
density: 4.216 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.02e-06 K-1
dPgF: -0.0086
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 51.0
alkali_resistance: 1.0
phosphate_resistance: 2.0
Comments
inquiry glass
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets