FTL8 by Ohara
Obsolete
Unknown
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) | 1.511179 |
|---|---|
| Abbe Number (Vd) | 51.020607 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.3 — 2.4 µm |
$$n(\lambda) = \sqrt{2.24987 - 0.01001\,\lambda^2 + 0.0106863\,\lambda^{-2} + 0.000985106\,\lambda^{-4} - 0.000101387\,\lambda^{-6} + 7.04465 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 10.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.081 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.5 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Similar Glasses (Other Manufacturers)
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| NSL36 | Ohara | 1.517417 | 52.412251 | |
| S-NSL36 | Ohara | 1.517417 | 52.430903 | |
| SSL5 | Ohara | 1.521299 | 52.553447 | |
| SSL2 | Ohara | 1.529441 | 51.722557 | |
| PBL6Y | Ohara | 1.531717 | 48.956017 | |
| PBL6 | Ohara | 1.531717 | 48.904553 | |
| S-TIL6 | Ohara | 1.531717 | 48.840718 | |
| NSL33 | Ohara | 1.514536 | 54.714595 | |
| PBL2 | Ohara | 1.54072 | 47.23368 | |
| S-TIL2 | Ohara | 1.54072 | 47.227127 |