Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn8
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.2767321-0.015115573λ^{2}+0.030753445λ^{-2}+0.00078350578λ^{-4}-3.4594495\text{×}10^{-06}λ^{-6}+2.0542573\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.92e-06 1.65e-08 -2.32e-10 6.04e-07 6.91e-10 0.225
nd: 1.83500
Vd: 42.7
glass_code: 835427
density: 4.9 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.4e-06 K-1
dPgF: -0.0093
climatic_resistance: 1.0
acid_resistance: 2.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book