Optics: measuring and testing – By light interference – Having wavefront division
Reexamination Certificate
2008-07-29
2008-07-29
Connolly, Patrick J (Department: 2877)
Optics: measuring and testing
By light interference
Having wavefront division
C356S484000, C356S450000
Reexamination Certificate
active
07405834
ABSTRACT:
An imaging method and associated system for producing high-resolution images. The method includes illuminating an object or scene with coherent radiation such as beams from a laser and then, collecting scattered light with a plurality of subapertures rather than a single large aperture. The method continues with coherently detecting, such as with heterodyne detection, the scattered light to measure the complex amplitude incident on each subaperture and digitally reconstructing images from the coherently detected light for the subapertures. Then digital co-phasing is performed on the subapertures using an image sharpness or quality metric to form an image having the resolution of the total subaperture area. The method may also include determining an aimpoint in the formed image, calculating a phase screen, directing laser beams through the subapertures towards the aimpoint, and co-phasing the laser beams by applying the phase screen to form a single beam.
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Embry Carl W.
Marron Joseph C.
Oien AnnMarie
Smith Duane D.
Thomson J. Alex
Connolly Patrick J
Lockheed Martin Corporation
McDermott Will & Emery LLP
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