Beam homogenizer

Details Beam homogenizer Beam homogenizer

1998-09-25

2000-02-15

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

For synthetically generating a hologram

359 15, 359900, G03H 100

Patent

active

060259388

ABSTRACT:
A beam homogenizer that minimizes undesired intensity variations at the output plane caused by sharp breaks between facets in previous embodiments. The homogenizer includes a hologram made up of irregularly patterned diffractive fringes. An input beam illuminates at least part of the hologram. The hologram transmits a portion of the input beam onto an output plane. In doing so, the energy of the input beam is spatially redistributed at the output plane into a homogenized output beam having a preselected spatial energy distribution at the output plane. Thus, the illuminated portion of the output plane has a shape predetermined by the designer of the homogenizer.

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