Optical constants of OHARA - FTL
FTL8
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.2498663-0.010009969λ^{2}+0.010686269λ^{-2}+0.00098510593λ^{-4}-0.00010138667λ^{-6}+7.0446543\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -5.081e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.511179 Vd: 51.020607 glass_code: 511510 glass_status: preferred density: 2.5 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 9e-06 K-1 - temperature_range: 20 300 °C coefficient: 1e-05 K-1 dPgF: 0.0058 acid_resistance: 1.0 phosphate_resistance: 1.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets