Tophat beam

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In optics, a tophat (or top-hat) beam is a laser beam with a near-uniform fluence (energy density) within a circular disk. It is typically formed by diffractive optical elements from a Gaussian beam. Tophat beams are often used in industry, for example for laser drilling of holes in printed circuit boards. They are also used in very high power laser systems, which use chains of optical amplifiers to produce an intense beam.

[edit] See also

• Laser beam profiler
• Bessel beam
• Top hat
• Example of company providing diffractive elements for the production of tophat beams