Optical device for homogenizing a laser beam
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United States of America Patent
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Jan 11, 2000
Grant Date -
N/A
app pub date -
Jan 21, 1998
filing date -
Aug 11, 1995
priority date (Note) -
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Abstract
An optical device for homogenizing a laser beam is described. Such a device is commonly used in the surface treatment of an object. The device consists of front lenses that are bonded together to form an assembly of lenses that breaks the laser light into multiple beams. This results in the homogenization of the gaussian profile of the beam intensity as viewed perpendicular to the beam's propagation. Advantageously the matrix of lenses is formed using groves or bevels in a manner that minimizes losses resulting from light impinging on glue disposed upon the entire lateral surface of the front lenses. In the invention gaps between front lenses that cause interference with the light path are eliminated. This gap free bonding is accomplished by filling the groves or bevels with glue, inserting a rod or wire into the grove to assemble the front lenses in a support frame, bonding a grill to assembled front lenses, or by using a combination of gluing with a support frame.
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