FD12 by Hoya
Obsolete
Unknown
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Optical Properties
| Refractive Index (nd) | 1.648308 |
|---|---|
| Abbe Number (Vd) | 33.793909 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{2.64027 - 0.0102475\,\lambda^2 + 0.0238093\,\lambda^{-2} + 0.00153489\,\lambda^{-4} - 9.58913 \times 10^{-5}\,\lambda^{-6} + 9.58391 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | — |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| SF12 | Sumita | 1.64831 | 33.8 | |
| SF12 | Schott | 1.64831 | 33.841187 | |
| S-TIM22 | Ohara | 1.647689 | 33.792803 | |
| PBM22 | Ohara | 1.647689 | 33.802937 | |
| N-SF2 | Schott | 1.64769 | 33.82 | |
| ZF1 | CDGM | 1.647693 | 33.836872 | |
| H-ZF1 | CDGM | 1.64769 | 33.840317 | |
| SF2 | Schott | 1.64769 | 33.85 | |
| H-ZF1A | CDGM | 1.64769 | 33.887993 | |
| SF2 | Sumita | 1.64769 | 33.9 |