FF1 by Hoya

Obsolete Unknown Environmentally Dangerous

FF1 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.511179 and a Vd of 51.02769. It has dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.511179
Abbe Number (Vd) 51.02769
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.24913 - 0.00985791\,\lambda^2 + 0.0113616\,\lambda^{-2} + 0.000730993\,\lambda^{-4} - 5.7945 \times 10^{-5}\,\lambda^{-6} + 4.19079 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FTL8 Ohara 1.511179 51.020607
KF8 Sumita 1.51118 50.9
K-SKF6 Sumita 1.512 52.1
H-KF6 CDGM 1.51742 52.149249
KF6 Sumita 1.51742 52.2
KF6 Schott 1.517421 52.200088
K-SKF6(M) Sumita 1.50847 52.6
NSL36 Ohara 1.517417 52.412251
KF5 Sumita 1.5231 50.9
S-NSL36 Ohara 1.517417 52.430903
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
E-CF6 Hoya 1.51742 52.15
CF6 Hoya 1.517419 52.154512
CF5 Hoya 1.5231 50.951831
CF2 Hoya 1.526296 51.046045
SBF5 Hoya 1.521299 52.780677
SBF2 Hoya 1.52944 51.643052
CF4 Hoya 1.533577 51.545117
E-FEL6 Hoya 1.53172 48.84
FEL6 Hoya 1.53172 48.837531
CF3 Hoya 1.51454 54.628437
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