Back to results
US 8,264,750 B2Granted
Image reading apparatus
AssigneeFuji Xerox Co., Ltd.
InventorHideo Takeuchi
Life of this patent
Estimating the term…
Abstract
There is provided an image reading apparatus including: a light source with arrayed light emitting elements; a light guide unit that scatters light emitted from the light source such that the light intensity is greater at end portions than at the central portion in the array direction of the light emitting elements, and guides the light to a reading position of a medium to be read; and an optical system that guides the light reflected at the reading position to a light detection unit that detects the light intensity.
Claims8
An image reading apparatus comprising:
- a light source with arrayed light emitting elements;
- a light guide unit that scatters light emitted from the light source such that the light intensity is greater at end portions than at the central portion in the array direction of the light emitting elements, and guides the light to a reading position of a medium to be read;
- and
- an optical system that guides the light reflected at the reading position to a light detection unit that detects the light intensity,
- wherein the light guide unit comprises:
- a light guide member that guides the light emitted from the light source to the reading position of the medium to be read;
- and
- recesses and projections that scatter the light, the recesses and projections being formed to a film body bonded to a light emitting face of the light guide member, and disposed with coarser intervals at the end portions than at the central portion in the array direction of the light emitting elements.
5 more elements
An image reading apparatus comprising:
- a light source with arrayed light emitting elements;
- a light guide unit that scatters light emitted from the light source such that the light intensity is greater at end portions than at the central portion in the array direction of the light emitting elements, and guides the light to a reading position of a medium to be read;
- and
- an optical system that guides the light reflected at the reading position to a light detection unit that detects the light intensity,
- wherein the light guide unit comprises:
- a light guide member that guides the light emitted from the light source to the reading position of the medium to be read;
- and
- recesses and projections that scatter the light, the recesses and projections being formed to at least one of a light emitting face and a light incident face of the light guide member, and disposed with coarser intervals at the end portions than at the central portion in the array direction of the light emitting elements.
5 more elements
Dependencies are inferred from the claim text.