TAFD37A by Hoya
Preferred
Very Common
Environmentally Dangerous
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) | 1.90043 |
|---|---|
| Abbe Number (Vd) | 37.37 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.49581 - 0.0143424\,\lambda^2 + 0.0378073\,\lambda^{-2} + 0.00141841\,\lambda^{-4} - 4.64703 \times 10^{-5}\,\lambda^{-6} + 6.91944 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.28 \times 10^{-7} + 2(8.14 \times 10^{-9})\,\Delta T + 3(-5.08 \times 10^{-11})\,\Delta T^2 + \frac{8.44 \times 10^{-7} + 2(7.6 \times 10^{-10})\,\Delta T}{\lambda - 0.225}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.9 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Recommended glass type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZLAF78B | CDGM | 1.90069 | 37.050531 | |
| S-LAH92 | Ohara | 1.891899 | 37.134024 | |
| D-ZLAF67 | CDGM | 1.88385 | 37.198899 | |
| S-LAH93 | Ohara | 1.90525 | 35.036826 | |
| D-ZLAF67-25 | CDGM | 1.88259 | 37.185491 | |
| H-ZLAF4LB | CDGM | 1.91082 | 35.282389 | |
| H-ZLAF4LA | CDGM | 1.91082 | 35.25034 | |
| K-LaSFn23 | Sumita | 1.911 | 35.2 | |
| H-ZLAF68N | CDGM | 1.883 | 39.2182 | |
| H-ZLAF68NB | CDGM | 1.883 | 39.235474 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| TAFD37 | Hoya | 1.90043 | 37.37 | |
| MP-TAFD307 | Hoya | 1.88202 | 37.22 | |
| M-TAFD307 | Hoya | 1.88202 | 37.22 | |
| MC-TAFD307 | Hoya | 1.88202 | 37.22 | |
| TAFD35L | Hoya | 1.91082 | 35.25 | |
| TAFD35 | Hoya | 1.91082 | 35.25 | |
| MC-TAFD317 | Hoya | 1.8812 | 37.17 | |
| TAFD17 | Hoya | 1.877999 | 38.197051 | |
| TAFD31 | Hoya | 1.922501 | 35.946005 | |
| TAFD33 | Hoya | 1.881 | 40.14 |