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Concept
Rayleigh Range
The
Rayleigh Range
is the
distance along the propagation direction
of a beam from the
beam waist
to the point where the
cross-sectional area
doubles, marking the transition between the near-field and
Far-field region
s. It is a critical parameter in
Gaussian beam optics
, influencing the beam's divergence and
depth of focus
, and is determined by the wavelength and the
waist size of the beam
.
3