M-TAFD405 by Hoya
Special
Very Rare
Precision Molding
Environmentally Friendly
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) | 1.9515 |
|---|---|
| Abbe Number (Vd) | 29.83 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.65424 - 0.0156883\,\lambda^2 + 0.0480941\,\lambda^{-2} + 0.00264981\,\lambda^{-4} - 0.000139719\,\lambda^{-6} + 1.95812 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.6 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[8.14588 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 5.45 |
|---|---|
| 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 | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Not in a position to accept new order because of discontinuation.
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| N-LASF55 | Schott | 1.9538 | 30.56 | |
| H-ZLAF89LA | CDGM | 1.95375 | 32.276235 | |
| H-ZLAF89L | CDGM | 1.95375 | 32.30879 | |
| S-LAH98 | Ohara | 1.953749 | 32.324727 | |
| CAWO4-E | Generic Birefringent | 1.937211 | 33.304949 | |
| S-LAH88 | Ohara | 1.916499 | 31.604148 | |
| SRMOO4-E | Generic Birefringent | 1.913456 | 28.381356 | |
| CAMOO4 | Generic Birefringent | 1.992539 | 28.832428 | |
| LASF18A | Schott | 1.913482 | 32.364492 | |
| SRMOO4 | Generic Birefringent | 1.908806 | 29.94765 |