E-FD80 by Hoya
Preferred
Very Common
Environmentally Friendly
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) | 1.6896 |
|---|---|
| Abbe Number (Vd) | 31.14 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{2.76598 - 0.0126214\,\lambda^2 + 0.0271565\,\lambda^{-2} + 0.00203894\,\lambda^{-4} - 0.000164854\,\lambda^{-6} + 1.93501 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 10.5 |
|---|---|
| TCE 100/300°C (10-6/K) | 14.3 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-9.78 \times 10^{-6} + 2(7.01 \times 10^{-10})\,\Delta T + 3(-1.58 \times 10^{-11})\,\Delta T^2 + \frac{8.91 \times 10^{-7} + 2(1.03 \times 10^{-9})\,\Delta T}{\lambda - 0.276}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.26 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 3 |
|---|---|
| Stain Resistance | 3 |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Recommended glass type.
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-SFLD8W | Sumita | 1.6891 | 31.2 | |
| H-ZF10 | CDGM | 1.68893 | 31.16057 | |
| SF8 | Schott | 1.688932 | 31.176063 | |
| K-SFLD8 | Sumita | 1.68893 | 31.1 | |
| ZF10 | CDGM | 1.688934 | 31.184753 | |
| PBM28 | Ohara | 1.68893 | 31.082901 | |
| PBM28W | Ohara | 1.68893 | 31.082901 | |
| C89-31 | Corning | 1.689004 | 31.210861 | |
| SF8 | Sumita | 1.68893 | 31.2 | |
| D-ZF10 | CDGM | 1.68893 | 31.077677 |