Manually operable document reading device for an image forming apparatus
AssigneeNEC Corporation
InventorsShinya Kubo, Tetsuichiro Yamamoto, Yasushi Matsumoto
Life of this patent
Estimating the term…
Abstract
An image reading device, particularly a hand scanner, capable of setting a reading position in the main scanning direction accurately at all times. A stage glass is affixed to the reading surface of the hand scanner. A reference line is printed on the stage glass outside of the valid reading range of a CCD (Charge Coupled Device) image scanner. For the adjustment of the valid reading range, the image sensor and a lens are roughly adjusted such that data representative of the reference line appears at the edge of the valid reading range. Subsequently, the valid reading range is electrically shifted in the main scanning direction such that the reference line disappears.
Claims18
A hand held device for reading image data out of a document, comprising:
- a casing;
- an image sensor attached to said casing;
- a lens for focusing an image adjacent a reading surface to said image sensor;
- a transparent member affixed to said casing to extend in a main scanning direction, and having a fixed mark positioned outside of a valid reading range of said image sensor, wherein said fixed mark is located at a fixed distance from said image sensor along a direction perpendicular to the main scanning direction;
- and
- adjusting means for automatically adjusting said valid reading range of said image sensor on the basis of a position of said fixed mark.
A hand held device for reading image data out of a document, comprising:
- a casing;
- an image sensor attached to said casing;
- a lens for focusing an image adjacent a reading surface to said image sensor;
- a transparent member affixed to said casing to extend in a main scanning direction, and having a fixed mark positioned outside of a valid reading range of said image sensor, wherein said fixed mark is located at a fixed distance from said image sensor along a direction perpendicular to the main scanning direction;
- and
- adjusting means for automatically adjusting, at a time of adjustment of said valid reading range, a position of said image sensor or a position of said lens such that data representative of said fixed mark appears at an edge of said valid reading range;
- and
- shifting means for shifting, after adjustment by said adjusting means, said valid reading range such that said fixed mark disappears from image data.
A hand held device for reading image data out of a document, comprising:
- a casing;
- an image sensor attached to said casing such that said image sensor is movable in one dimension with respect to said casing;
- a lens attached to said casing such that said lens focuses an image to said image sensor;
- a transparent member attached to said casing along a reading surface and extending in a main scanning direction, wherein said transparent member includes a fixed mark thereon positioned outside of a valid reading range of said image sensor, wherein said fixed mark is located at a fixed distance from said image sensor along a direction perpendicular to the main scanning direction;
- a shifting mechanism connected to said image sensor and said lens;
- and
- an adjusting member for automatically adjusting said valid reading range of said image sensor on the basis of a position of said fixed mark.
Dependencies are inferred from the claim text.