Document scanning device
AssigneePanasonic Corporation
InventorsTakafumi SANADA, Yuuzou KAWANO, Kohei SUYAMA
Life of this patent
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Abstract
A document scanning device includes a pair of light guides that extend in a main scanning direction of a document and illuminate the document, and a reference plate that is positioned closer to the light guides than the document. Each of the light guides has a first area that illuminates the document and a second area that illuminates the reference plate. Each light guide illuminates the reference plate over a wider area between the light guides in the second area than each light guide illuminates the document in the first area. Therefore, the center of the reference plate is illuminated and a sufficient amount of light is reflected on the reference plate.
Claims20
A document scanning device comprising:
- a pair of light guides that extend in a main scanning direction of a document and illuminate the document;
- and
- a reference plate that is positioned closer to the light guides than the document;
- wherein each of the light guides has a first area that illuminates the document and a second area that illuminates the reference plate, and
- each light guide illuminates the reference plate over a wider area between the light guides in the second area than each light guide illuminates the document in the first area.
Dependencies are inferred from the claim text.