F4 by Hoya
Obsolete
Unknown
Environmentally Dangerous
F4 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.616589 and a Vd of 36.615561. It has dangerous environmental properties.
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.616589 |
|---|---|
| Abbe Number (Vd) | 36.615561 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{2.54492 - 0.00864477\,\lambda^2 + 0.0224159\,\lambda^{-2} + 0.000776435\,\lambda^{-4} - 1.1954 \times 10^{-5}\,\lambda^{-6} + 3.82572 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| F3 | CDGM | 1.616592 | 36.627394 | |
| F4 | Schott | 1.616592 | 36.628072 | |
| F4 | Sumita | 1.61659 | 36.6 | |
| PBM4 | Ohara | 1.616588 | 36.632973 | |
| H-F3 | CDGM | 1.61659 | 36.651688 | |
| F4GTI | CDGM | 1.62005 | 36.430327 | |
| N-F2 | Schott | 1.62005 | 36.43 | |
| F2HT | Schott | 1.62004 | 36.37 | |
| F2HTi | Schott | 1.62004 | 36.37 | |
| F2 | Schott | 1.62004 | 36.37 |