Mechanically-adjustable optical phase filters for modifying...

Details Mechanically-adjustable optical phase filters for modifying... Mechanically-adjustable optical phase filters for modifying...

2007-02-20

2007-02-20

Harrington, Alicia (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S708000

Reexamination Certificate

active

10810446

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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Plummer, et al. “Photographic Optical Systems With Nonrotational Aspheric Surfaces” Applied Optics, vol. 38, No. 16, pp. 3572-3592, Jun. 1, 1999.

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