FEL1 by Hoya

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.25–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.25–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.300–1.550 µm
Optical Properties
Refractive Index (nd) 1.548136
Abbe Number (Vd) 45.822169
Dispersion Formula Schott
Wavelength Range 0.25 — 1.55 µm
$$n(\lambda) = \sqrt{2.35166 - 0.00881526\,\lambda^2 + 0.014774\,\lambda^{-2} + 0.000768792\,\lambda^{-4} - 5.96261 \times 10^{-5}\,\lambda^{-6} + 4.52894 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.4
TCE 100/300°C (10-6/K) 99.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.54487 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.93
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
H-QF1 CDGM 1.54814 45.820011
N-LLF1 Schott 1.54814 45.851572
S-TIL1 Ohara 1.548141 45.784277
PBL1 Ohara 1.548141 45.781144
QF1 CDGM 1.5481 45.886233
LLF1HT Schott 1.548144 45.888593
LLF1 Schott 1.54814 45.75
LLF1 Sumita 1.54814 45.9
LLF1HTi Schott 1.54815 45.9
PBL1Y Ohara 1.548141 45.733282
Similar Glasses (Hoya)
Glass Manufacturer nd Vd
E-FEL1 Hoya 1.54814 45.82
FEL7 Hoya 1.54883 45.439785
FEL2 Hoya 1.540718 47.198247
E-FEL2 Hoya 1.54072 47.2
FEL4 Hoya 1.561379 45.226718
FEL3 Hoya 1.560125 47.090971
FF2 Hoya 1.532561 45.942878
SBF1 Hoya 1.551151 49.517289
FEL6 Hoya 1.53172 48.837531
E-FEL6 Hoya 1.53172 48.84
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