Optical constants of SCHOTT - LaSF (Lanthanum dense flint)
N-LASF31
Wavelength:
µm
(0.32–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.71317198λ^2}{λ^2-0.00819172228}+\frac{0.718575109λ^2}{λ^2-0.0297801704}+\frac{1.7233247λ^2}{λ^2-138.461313}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.29e-06 8.93e-09 -1.59e-11 6.52e-07 8.09e-10 0.236
nd: 1.88067E+00
Vd: 4.10100E+01
glass_code: 881410.541
glass_status: preferred
density: 5.41 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.7e-06 K-1
dPgF: -0.0084
climatic_resistance: 1.0
stain_resistance: 0.0
acid_resistance: 2.0
alkali_resistance: 1.0
phosphate_resistance: 1.0
Comments
was replaced by N-LASF31A
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets