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US 6,320,681 B1Granted
Image reading apparatus
AssigneeCanon Kabushiki Kaisha
InventorAkihiko Yushiya
Life of this patent
Estimating the term…
Abstract
There is disclosed an image reading apparatus having a plurality of illuminating packages and an optical guide member for guiding lights from the plurality of illuminating packages and reflecting in the direction of an object, thereby irradiating the object in a line shape, wherein three or more illuminating packages are arranged at positions in the optical guide member which are symmetrical for a reflecting portion of the optical guide member and an image can be read at a high picture quality.
Claims84
An image reading apparatus comprising:
- a plurality of groups of illuminators, constructed from a plurality of packages, each of which having a plurality of light emitting elements enclosed as one package;
- an optical guide, arranged to guide the light from said plurality of groups of illuminators and reflect it in a direction of an object, thereby irradiating said object in a line shape;
- and
- a photoelectric convertor, arranged to photoelectrically convert the light reflected from said object to output an image signal,
- wherein said plurality of groups of illuminators are arranged at positions which are symmetrical with respect to a reflecting portion of the optical guide when viewed along a longitudinal direction of said optical guide.
2 more elements
An image reading apparatus comprising:
- a plurality of illuminators of different sizes in each of which a plurality of light sources are packaged;
- and
- an optical guide, arranged to guide light emitted from said plurality of illuminators and to reflect it in a direction of an object, thereby illuminating said object in a line shape,
- wherein a small package among said plurality of packages is arranged at a position near a reflecting portion of said optical guide and a large package is arranged at a position far from said reflecting portion.
1 more element
An illuminating apparatus comprising:
- a plurality of groups of illuminators, constructed from a plurality of packages, each of which having a plurality of light emitting elements enclosed as one package;
- and
- an optical guide arranged to guide lights from said plurality of groups of illuminators and to reflect the guided lights in a direction of an object so as to illuminate said object in a line shape,
- wherein said plurality of groups of illuminators are arranged at a position which is symmetrical with respect to a reflection portion of said optical guide when viewed along a longitudinal direction of said optical guide.
1 more element
An image reading system comprising:
- a plurality of groups of illuminators, constructed from a plurality of packages, each of which having a plurality of light emitting elements enclosed as one package;
- an optical guide arranged to guide light from said plurality of groups of illuminators and to reflect the guided light towards an object to illuminate the object in a line shape,
- a photoelectric converter, arranged to photoelectrically convert light from the object into an image signal;
- and
- a positional shifter, arranged to shift the relative position of the object with respect to said photoelectric converter,
- wherein said plurality of groups of illuminators are arranged at a symmetrical position with respect to the reflection portion of the optical guide when viewed along a longitudinal direction of said optical guide.
3 more elements
An image reading system comprising:
- a plurality of groups of illuminators, constructed from a plurality of packages, each of which having a plurality of light emitting elements enclosed as one package;
- an optical guide arranged to guide light from said plurality of groups of illuminators and to reflect the guided light towards an object to illuminate the object in a line shape,
- a photoelectric converter, arranged to photoelectrically convert light from the object into an image signal;
- and
- a signal processor, arranged to perform predetermined processing on the image signal,
- wherein said plurality of groups of illuminators are arranged at a symmetrical position with respect to the reflection portion of the optical guide when viewed along a longitudinal direction of said optical guide.
3 more elements
An image reading system comprising:
- a plurality of groups of illuminators, constructed from a plurality of packages, each of which having a plurality of light emitting elements enclosed as one package;
- an optical guide arranged to guide light from the plurality of groups of illuminators and to reflect the guided light towards an object to illuminate the object in a line shape,
- a photoelectric converter, arranged to photoelectrically convert light from the object into an image signal;
- and
- a controller, arranged to control the driving of the illuminators and the photoelectric converter,
- wherein said plurality of groups of illuminators are arranged at a symmetrical position with respect to the reflection portion of the optical guide when viewed along a longitudinal direction of the optical guide.
3 more elements
Dependencies are inferred from the claim text.