Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn14
Wavelength:
µm
(0.340 – 2.000)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=3.2643191-0.016265121λ^{2}+0.03202838λ^{-2}+0.0015271854λ^{-4}-4.7775544\text{×}10^{-05}λ^{-6}+5.7345907\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.04e-06 1.48e-08 -2.22e-10 7.19e-07 7.99e-10 0.248
nd: 1.83400
Vd: 37.3
glass_code: 834373
density: 4.18 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.5e-06 K-1
dPgF: -0.0024
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