Optical: systems and elements – Diffusing of incident light
Reexamination Certificate
2005-01-25
2005-01-25
Juba, Jr., John (Department: 2872)
Optical: systems and elements
Diffusing of incident light
C359S015000, C359S025000, C355S067000, C355S071000
Reexamination Certificate
active
06847485
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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Feldman Michael R.
Kathman Alan D.
Digital Optics Corp.
Jr. John Juba
Morse Susan S.
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