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