The spot size for our Raman probe is approximately 105um. The standard Raman-probe tip has a working distance is 5mm, but we also have other options available – ask your Application Scientist for more details.
| Focal Length (mm) | Spot Size * (um) |
Approx. Depth of Field (mm) |
Numerical Aperture |
| 2.0 | 50 | 0.5 | 0.60 |
| 5.0 | 105 | 1.0 | 0.40 |
| 7.5 | 158 | 2.2 | 0.27 |
| 10.0 | 210 | Not measured | 0.20 |
| 12.5 | 263 | Not measured | 0.16 |
