E-FDS1 by Hoya
Standard
Rare
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) | 1.92286 |
|---|---|
| Abbe Number (Vd) | 20.88 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.50446 - 0.0203338\,\lambda^2 + 0.0538027\,\lambda^{-2} + 0.00628742\,\lambda^{-4} - 0.000569222\,\lambda^{-6} + 7.35594 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.37 \times 10^{-6} + 2(1.1 \times 10^{-8})\,\Delta T + 3(-2.29 \times 10^{-11})\,\Delta T^2 + \frac{1.06 \times 10^{-6} + 2(1.516 \times 10^{-9})\,\Delta T}{\lambda - 0.311}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.94 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 2 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
General glass Type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| N-SF66 | Schott | 1.92286 | 20.88 | |
| SF66 | Schott | 1.92286 | 20.88 | |
| H-ZF62GT | CDGM | 1.92286 | 20.879915 | |
| H-ZF62 | CDGM | 1.92286 | 20.879915 | |
| PBH21 | Ohara | 1.922861 | 20.884172 | |
| PBH71 | Ohara | 1.922864 | 21.288699 | |
| REALVIEW_1.9_LIGHTWEIGHT | Schott | 1.922002 | 21.44 | |
| SF58 | Schott | 1.917613 | 21.51112 | |
| PBH72 | Ohara | 1.915356 | 21.171926 | |
| K-PSFn5 | Sumita | 1.9211 | 22.4 |