F2 by Hoya
Obsolete
Unknown
Environmentally Dangerous
F2 by Hoya is an obsolete optical glass. It transmits from 0.32 to 1.55 µm with an nd of 1.62004 and a Vd of 36.303385. It has medium thermal expansion (CTE of 8.3×10⁻⁶/K), excellent chemical resistance, and dangerous environmental properties.
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) | 1.62004 |
|---|---|
| Abbe Number (Vd) | 36.303385 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.25 — 1.55 µm |
$$n(\lambda) = \sqrt{2.55283 - 0.00753255\,\lambda^2 + 0.02413\,\lambda^{-2} + 0.000395033\,\lambda^{-4} + 4.12449 \times 10^{-5}\,\lambda^{-6} + 1.24639 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.3 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.96683 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| F2 | Sumita | 1.62004 | 36.3 | |
| C20-36 | Corning | 1.62001 | 36.30126 | |
| PBM2Y | Ohara | 1.620041 | 36.269263 | |
| S-TIM2 | Ohara | 1.620041 | 36.263378 | |
| H-F4 | CDGM | 1.62005 | 36.345886 | |
| PBM2 | Ohara | 1.620041 | 36.256658 | |
| F4 | CDGM | 1.620047 | 36.35673 | |
| F2HTi | Schott | 1.62004 | 36.37 | |
| F2HT | Schott | 1.62004 | 36.37 | |
| F2 | Schott | 1.62004 | 36.37 |