Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn1
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.1704478-0.012872124λ^{2}+0.030711328λ^{-2}+0.00091467552λ^{-4}-4.2179151\text{×}10^{-05}λ^{-6}+5.885503\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 6.7e-07 1.3e-08 -3.16e-10 7.17e-07 7.77e-10 0.224
nd: 1.80610
Vd: 40.7
glass_code: 806407
density: 4.17 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8e-06 K-1
dPgF: -0.0087
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