Optical constants of SCHOTT - LaSF (Lanthanum dense flint)
N-LASF31A
Wavelength:
µm
(0.25–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.96485075λ^2}{λ^2-0.00982060155}+\frac{0.475231259λ^2}{λ^2-0.0344713438}+\frac{1.48360109λ^2}{λ^2-110.739863}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.67e-06 8.9e-09 -8.73e-12 7.47e-07 7.46e-10 0.207
nd: 1.883
Vd: 40.76
glass_code: 883408.551
glass_status: standard
density: 5.51 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.74e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.72e-06 K-1
dPgF: -0.0085
climatic_resistance: 1.0
stain_resistance: 0.0
acid_resistance: 2.3
alkali_resistance: 1.0
phosphate_resistance: 1.0
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets