Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1998-03-24
2000-08-01
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347233, 347250, 25055929, 359204, B41J 2435
Patent
active
060974184
ABSTRACT:
The present invention eliminates artifacts in an image formed using a plurality of imaging sources. Visible seams in the image are eliminated by randomizing the stitch point between the scan lines produced by each imaging source. The randomization may be optimized by additionally applying a method for relocating the random stitch point based on the data content of the scan line, adjacent scan lines, and other criteria. The present invention further compensates for in-scan and cross-scan errors caused by thermally induced errors, spinner synchronization errors, mechanical misalignment, and other factors associated with the use of a plurality of imaging systems. A photodetector system, comprising a mask having a pair of triangular openings, provides measurements of the in-scan and cross-scan errors.
REFERENCES:
patent: 4940304 (1990-07-01), Hatori
patent: 5570195 (1996-10-01), Honbo
patent: 5583557 (1996-12-01), Yamamoto et al.
patent: 5654817 (1997-08-01), De Loor
patent: 5930019 (1999-07-01), Suzuki et al.
Coppeta David
Larsen David B.
Nolan John F.
Rolfe Norman F.
Agfa Corporation
Le N.
Merecki John A.
Pham Hai C.
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