E-FDS1-W by Hoya
Preferred
Very Common
Environmentally Friendly
E-FDS1-W by Hoya is a preferred optical glass with a very common melt frequency. It transmits from 0.38 to 1.55 µm with an nd of 1.92286 and a Vd of 20.88. It has low thermal expansion (CTE of 6.0×10⁻⁶/K) and good 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
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) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.37 \times 10^{-6} + 2(1.1 \times 10^{-8})\,\Delta T + 3(-2.29 \times 10^{-11})\,\Delta T^2 + \frac{1.06 \times 10^{-6} + 2(1.516 \times 10^{-9})\,\Delta T}{\lambda - 0.311}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 2 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Recommended glass type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| 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 |