The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2003
Filed:
Jun. 26, 2001
Victor C. Wong, Rochester, NY (US);
Badhri Narayan, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A printhead having a plurality of exposure elements ( ) with improved non-uniformity correction. Spatial variance of the energy emitted by the exposure elements ( ) is measured and used to establish spot size characteristics for each exposure element. A sensor ( ) scans multiple points along the pixel area written by each exposure element ( ) and measures a corresponding output power value at each point. The output power values are evaluated to determine a maximum output power value for the exposure element ( ) and to obtain a spot size for the exposure element ( ) based on full-width at half-power values. Both spot size data, which can thus be obtained and stored only once, and output power values are then used to correct for non-uniformity's between the exposure elements ( ).