FEL3 by Hoya

Obsolete Unknown Environmentally Dangerous

FEL3 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.560125 and a Vd of 47.090971. 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) 1.560125
Abbe Number (Vd) 47.090971
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.39178 - 0.010682\,\lambda^2 + 0.0131235\,\lambda^{-2} + 0.0012012\,\lambda^{-4} - 0.000109301\,\lambda^{-6} + 6.56748 \times 10^{-6}\,\lambda^{-8}}$$
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
BAF1 Sumita 1.5569 48.5
LLF4 Sumita 1.56138 45.3
LLF1HTi Schott 1.54815 45.9
LLF1 Sumita 1.54814 45.9
LLF1HT Schott 1.548144 45.888593
QF1 CDGM 1.5481 45.886233
N-LLF1 Schott 1.54814 45.851572
H-QF1 CDGM 1.54814 45.820011
QF70GFI CDGM 1.547 48.161896
S-TIL1 Ohara 1.548141 45.784277
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
FEL4 Hoya 1.561379 45.226718
FEL1 Hoya 1.548136 45.822169
E-FEL1 Hoya 1.54814 45.82
FEL7 Hoya 1.54883 45.439785
E-FEL2 Hoya 1.54072 47.2
FEL2 Hoya 1.540718 47.198247
BAF2 Hoya 1.56965 49.392725
SBF1 Hoya 1.551151 49.517289
BAF3 Hoya 1.58267 46.462286
FF2 Hoya 1.532561 45.942878
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