Method and apparatus for phase correction in a scanned beam...

Details Method and apparatus for phase correction in a scanned beam... Method and apparatus for phase correction in a scanned beam...

2011-06-14

2011-06-14

Safaipour, Houshang (Department: 2625)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S447000, C358S471000, C358S296000

Reexamination Certificate

active

07961362

ABSTRACT:
A method for detecting scanner phase error in a bidirectional scanned beam imager includes obtaining first and second images derived from respective first and second scan directions, comparing apparent image feature positions in the first and second images, and calculating a phase error corresponding to a difference between the apparent image feature positions. The comparison may include multiplying frequency domain transformations of the images.

REFERENCES:
patent: 5121138 (1992-06-01), Schermer et al.
patent: 6084627 (2000-07-01), Cook et al.
patent: 6337162 (2002-01-01), Irie
patent: 2001/0006544 (2001-07-01), Kawasaki et al.
patent: 2003/0178554 (2003-09-01), Zak
patent: 2005/0040513 (2005-02-01), Salmon

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