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US 2006/0132523 A1Published application
2 Dimensional laser-based optical printer encoder
OwnerTong Xie, Marshall DePueinventors
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Abstract
The present invention is a printer that includes an optical encoder that accurately represents the actual motion of the paper in both X and Y directions. The optical encoder uses a coherent or quasi-coherent illumination source. A detector may be used to capture images produced from the reflected light off the print media.
Claims18
A printer comprising:
- a media transport assembly receiving print media, including a 2D optical encoder positioned proximate to the print media, generating a signal indicative of the print media position;
- and
- a print control engine, receiving the signal and generating a response;
- the media transport assembly receiving the response.
1 more element
A method comprising:
- moving media in a printer;
- applying a light source towards a surface of the media, the source is one of a coherent and quasi-coherent source;
- detecting a pattern corresponding to a reflection of the surface;
- and
- analyzing the pattern to determine actual position of the media.
2 more elements
Dependencies are inferred from the claim text.