Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn9
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.2184433-0.014906369λ^{2}+0.02692619λ^{-2}+0.00087409748λ^{-4}-4.0331281\text{×}10^{-05}λ^{-6}+3.1677745\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.34e-06 2.13e-08 -1.52e-10 5.8e-07 6.95e-10 0.204
nd: 1.81600
Vd: 46.7
glass_code: 816467
density: 4.96 g/cm3
thermal_expansion:
- temperature_range: -30 70 ℃
coefficient: 6.3e-06 K-1
- temperature_range: 20 300 ℃
coefficient: 7.6e-06 K-1
dPgF: -0.0086
climatic_resistance: 1.0
acid_resistance: 3.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book