Mechanically-adjustable optical phase filters for modifying depth of field, aberration-tolerance, anti-aliasing in optical systems
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United States of America Patent
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Feb 20, 2007
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app pub date -
Mar 25, 2004
filing date -
Mar 28, 2003
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Abstract
An optical system with mechanical adjustment provides for the rotation and/or translation of one or more optical phase filters to variably select an extended depth of field, aberration-tolerance, and/or anti-aliasing properties of an optical imaging system. By adjusting the amount of phase induced on the wavefront, a user may select image quality selectively. The system may further automatically counter change of focus and/or aperture to maintain substantially constant image properties. Typically, two phase filters are used and moved concurrently to achieve desired image properties.
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