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Revision 00 EN - 01/2021
HP-MSM-HB
35,0(6
23
Appendix B: Basis of laser beam diagnosis
23.1
Laser beam parameter
z-axis
z-axis
Raw beam diameter d
σ
Focal length
f
Divergence angle
θ
θ
Focus diameter
d
σ
F
d
σ
F
z
R
Fig. 23.1:
Sketch for the definition of beam parameters