Gaussian beam

(redirected from Rayleigh range)

Gaussian beam

[′gau̇s·ē·ən ′bēm]
(electromagnetism)
A beam of electromagnetic radiation whose wave front is approximately spherical at any point along the beam and whose transverse field intensity over any wave front is a Gaussian function of the distance from the axis of the beam.
References in periodicals archive ?
The specifications for selecting a laser segment discusses wavelength, coherence length, beam divergence, and Rayleigh range. The beam expander configurations and design segment introduces the uses of beam expanders and considers their differing designs and how they work.
The sheet-forming optics consisted of a single 300 mm focal length cylindrical lens that formed the beam into a horizontal sheet with a 320 [micro]m thickness and 8 mm width; the Rayleigh range was 11 mm, yielding a uniform sheet size in the imaging area shown in Figure 4.