Method and apparatus for correcting a visible light beam using a wire-grid polarizer
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United States of America Patent
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May 20, 2008
Grant Date -
Jul 7, 2005
app pub date -
Nov 24, 2004
filing date -
Mar 27, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
An optical system and method for providing a visible light beam with a desired characteristic includes a visible light source producing a visible light beam defining an optical train. An optical element is disposed in the optical train to create a modified beam, and that is capable of introducing an undesired characteristic that continuously transitions across at least a portion of the modified beam. A wire-grid polarizer is disposed in the optical train, and has a plurality of elongated elements with at least a portion that continuously transitions to a different characteristic. The wire-grid polarizer is positioned and oriented in the optical train with the different characteristic corresponding to the undesired characteristic of the modified beam to obtain a visible light beam with a desired characteristic substantially across the visible light beam.
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