Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn21
Wavelength:
µm
(0.360–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.3040338-0.016019748λ^{2}+0.037645989λ^{-2}+0.0021532464λ^{-4}-0.00020498123λ^{-6}+2.7623217\text{×}10^{-05}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.35e-06 1.38e-08 -2.07e-11 8.23e-07 1.31e-09 0.268
nd: 1.85000
Vd: 32.4
glass_code: 850324
density: 3.99 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.6e-06 K-1
dPgF: 0.0085
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