E-FL5 by Hoya
Standard
Rare
Environmentally Friendly
E-FL5 by Hoya is a standard optical glass with a rare melt frequency. It transmits from 0.35 to 1.55 µm with an nd of 1.58144 and a Vd of 40.89. It has medium thermal expansion (CTE of 7.9×10⁻⁶/K) and excellent chemical resistance.
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.58144 |
|---|---|
| Abbe Number (Vd) | 40.89 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{2.44658 - 0.010107\,\lambda^2 + 0.0177591\,\lambda^{-2} + 0.000879703\,\lambda^{-4} - 5.70149 \times 10^{-5}\,\lambda^{-6} + 6.09247 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.75 \times 10^{-6} + 2(1.66 \times 10^{-8})\,\Delta T + 3(-9.67 \times 10^{-11})\,\Delta T^2 + \frac{6.44 \times 10^{-7} + 2(4.37 \times 10^{-10})\,\Delta T}{\lambda - 0.264}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
General glass Type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| LF5HTi | Schott | 1.58144 | 40.89 | |
| H-QF50 | CDGM | 1.58144 | 40.888972 | |
| QF50GTI | CDGM | 1.58144 | 40.885954 | |
| QF50 | CDGM | 1.58144 | 40.885954 | |
| LF5HT | Schott | 1.581483 | 40.913786 | |
| PBL35Y | Ohara | 1.581591 | 40.855991 | |
| LF5 | Schott | 1.58144 | 40.85 | |
| N-LF5 | Schott | 1.58144 | 40.848909 | |
| B81-41 | Corning | 1.581396 | 40.816116 | |
| LF5 | Sumita | 1.58144 | 40.8 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| FL5 | Hoya | 1.581437 | 40.887611 | |
| FL57 | Hoya | 1.576163 | 41.39334 | |
| FL4 | Hoya | 1.578447 | 41.707529 | |
| FL7 | Hoya | 1.57501 | 41.509668 | |
| FL3 | Hoya | 1.58215 | 42.028564 | |
| FL1 | Hoya | 1.573091 | 42.586108 | |
| F8 | Hoya | 1.595514 | 39.221686 | |
| E-F8 | Hoya | 1.59551 | 39.22 | |
| E-FL6 | Hoya | 1.56732 | 42.84 | |
| FL6 | Hoya | 1.567324 | 42.843119 |