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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