FTL8 by Ohara
Obsolete
Unknown
Environmentally Dangerous
FTL8 by Ohara is an obsolete optical glass. It transmits from 0.35 to 0.70 µm with an nd of 1.511179 and a Vd of 51.020607. It has medium thermal expansion (CTE of 9.0×10⁻⁶/K), excellent chemical resistance, and dangerous environmental properties.
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
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) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.081 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| FF1 | Hoya | 1.511179 | 51.02769 | |
| KF8 | Sumita | 1.51118 | 50.9 | |
| K-SKF6 | Sumita | 1.512 | 52.1 | |
| H-KF6 | CDGM | 1.51742 | 52.149249 | |
| E-CF6 | Hoya | 1.51742 | 52.15 | |
| CF6 | Hoya | 1.517419 | 52.154512 | |
| KF6 | Sumita | 1.51742 | 52.2 | |
| KF6 | Schott | 1.517421 | 52.200088 | |
| CF5 | Hoya | 1.5231 | 50.951831 | |
| K-SKF6(M) | Sumita | 1.50847 | 52.6 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| 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 |