Method and apparatus to correct for active write length and bow

Details Method and apparatus to correct for active write length and bow Method and apparatus to correct for active write length and bow

1992-11-23

1999-10-26

Yockey, David F.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

359652, 385116, B41J 246, G02B 300, G02B 606

Patent

active

059737182

ABSTRACT:
An image bar printing system, which, in a preferred embodiment, utilizes a plurality of LED arrays to provide a plurality of color images. The print bars are used in conjunction with a plurality of gradient index lens arrays which optically couple and focus the LED outputs onto a photosensitive surface. In order to maintain image-to-image registration, out of spec deviations in active write length of the image bar and scan line bow are identified and compensated for by selective deformation of one or more lens arrays in a specified manner. The lens deformation serves to reorient the position of certain of the lens elements, redirecting the transmitted LED outputs so as to shorten or lengthen the active write length, or to eliminate bow in the scan line.

REFERENCES:
patent: 4427284 (1984-01-01), Dannatt
patent: 4589736 (1986-05-01), Herrigan et al.
patent: 4904049 (1990-02-01), Hegg
Rees, James D. and Smith, Abbott "A Gradient Index Lens Array for Imaging a Curved Object Onto a Planar Image Plane". In: Xerox Disclosure Journal, Jul./Aug. 1984, vol. 9, No. 4, pp. 257-258.

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