Optical constants of SCHOTT - LaSF (Lanthanum dense flint)
LASFN9
Wavelength:
µm
(0.365–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.97888194λ^2}{λ^2-0.0118537266}+\frac{0.320435298λ^2}{λ^2-0.052738177}+\frac{1.92900751λ^2}{λ^2-166.25654}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 9.44e-07 1.14e-08 -1.87e-11 9.22e-07 1.22e-09 0.255
nd: 1.85025
Vd: 32.17
glass_code: 850322.444
glass_status: preferred
density: 4.44 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.4e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.4e-06 K-1
dPgF: 0.0036
climatic_resistance: 2.0
stain_resistance: 0.0
acid_resistance: 2.0
alkali_resistance: 1.0
phosphate_resistance: 1.0
Comments
was replaced by N-LASF9
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets