ATF4 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) | 1.653757 |
|---|---|
| Abbe Number (Vd) | 44.723072 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{2.67581 - 0.00953529\,\lambda^2 + 0.0188135\,\lambda^{-2} + 0.00114258\,\lambda^{-4} - 8.90163 \times 10^{-5}\,\lambda^{-6} + 6.81799 \times 10^{-6}\,\lambda^{-8}}$$
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 | |
|---|---|---|---|---|
| BAF51 | Schott | 1.652242 | 44.930457 | |
| N-BAF51 | Schott | 1.65224 | 44.96 | |
| C48-46 | Corning | 1.647747 | 46.227993 | |
| S-BAM12 | Ohara | 1.6393 | 44.872804 | |
| BAM12 | Ohara | 1.6393 | 44.878032 | |
| BAF12 | Sumita | 1.6393 | 45.0 | |
| BAF13 | Schott | 1.668919 | 44.961828 | |
| BAH13 | Ohara | 1.668921 | 44.987354 | |
| BAF13 | Sumita | 1.66892 | 45.0 | |
| K-LCV93(M) | Sumita | 1.66355 | 47.2 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BAF23 | Hoya | 1.652238 | 44.922169 | |
| BAF12 | Hoya | 1.639302 | 45.070071 | |
| BAF13 | Hoya | 1.668916 | 44.911265 | |
| BAF10 | Hoya | 1.67003 | 47.2 | |
| BAFD6 | Hoya | 1.66755 | 41.933458 | |
| BAF9 | Hoya | 1.643278 | 47.941673 | |
| BAF22 | Hoya | 1.682496 | 44.671672 | |
| BAF11 | Hoya | 1.66672 | 48.3 | |
| ADF355 | Hoya | 1.6445 | 40.762285 | |
| BAF20 | Hoya | 1.685777 | 43.901833 |