Image reading apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMakoto Ogura, Kenji Nagata, Tatsundo Kawai, Oji Saito, Satoshi Itabashi, Masami Tabata
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Abstract
An image reading apparatus having a light guide unit with a light source for applying light to an image reading surface, and a board provided with a photoelectrical conversion element for photoelectrically converting light reflected from the image reading surface into an electrical signal, wherein the light guide unit is supported by the board by making the light guide unit in contact with the board.
Claims63
An image reading apparatus comprising:
- a light guide unit comprising a light source and a longitudinal light transmitting member including a light incidence surface arranged at a longitudinal end of the longitudinal light transmitting member, to which light emitted from said light source is incident, and a light radiation surface from which light is radiated to an image reading surface, said longitudinal light transmitting member for guiding the incident light with reflection thereof from an inner surface of said longitudinal light transmitting member along the longitudinal direction of said light guide unit;
- and
- a board provided with a photoelectrical conversion element for photoelectrically converting light reflected from the image reading surface into an electrical signal,
- wherein said light guide unit is contacted with said board to thereby support said light guide unit by said board.
An image reading apparatus comprising:
- a light guide unit comprising a light source and a longitudinal light transmitting member including a light incidence surface arranged at a longitudinal end of the longitudinal light transmitting member, to which light is emitted from said light source is incident, and a light radiation surface from which light is radiated to an image reading surface, said longitudinal light transmitting member for guiding the incident light with reflection thereof from an inner surface of said longitudinal light transmitting member along the longitudinal direction of said light guide unit;
- and
- a board provided with a photoelectrical conversion element for photoelectrically converting light reflected from the image reading surface into an electrical signal;
- a frame for holding said light guide unit and said board;
- and
- a light shielding member for preventing light other than image information light reflected from the image reading surface from entering the photoelectrical conversion element,
- wherein said light shielding member is a discrete member different from said frame.
An information processing apparatus according to claim 33, further comprising a frame for supporting said light guide unit and said board, wherein at least a portion of said light guide unit is supported by being squeezed by said frame and said board.
An information processing apparatus according to claim 33, wherein said light guide unit is formed with a projection for supporting said light guide unit, the projection being in contact with said board.
An information processing apparatus according to claim 33, wherein said light guide unit includes a flat surface which is in contact with said board to support said light guide unit.
An information processing apparatus according to claim 33, wherein said light guide unit is formed with an extruded portion which is fixedly inserted into a recess formed in said board.
An information processing apparatus according to claim 33, wherein said board is formed with a projection for supporting said light guide unit, said projection being in contact with said light guide unit.
An information processing apparatus according to claim 33, wherein said light guide unit includes a light guide frame covering the guide member excepting a light radiation output port.
An information processing apparatus according to claim 33, wherein said light guide unit is mounted on said board via a spacer.
An information processing apparatus according to claim 33, wherein said board is a transparent board, and the photoelectrical conversion element is mounted on a surface of the transparent board opposite to the side of said light guide unit.
An information processing apparatus according to claim 33, wherein the light source is mounted on said board.
An, apparatus according to claim 33, wherein said light source includes a plurality of light emitting elements.
An apparatus according to claim 33, wherein the light radiation surface of said light guide unit is a lens-shaped surface.
An information processing apparatus according to claim 33, further comprising drive means for shifting a positional relationship between said original image and said photoelectrical conversion element.
An information processing apparatus comprising:
- an image reader including a light guide unit comprising a light source and a longitudinal light transmitting member, a board provided with a photoelectrical convrsion element for photoelectrically converting light reflected from an original image into an electrical signal, a frame for holding said light guide unit and said board, and a light shielding member for preventing light other than image information light reflected from said original image from entering the photoelectrical conversion element, said longitudinal light transmitting member including a light incidence surface arranged at a longitudinal end of the longitudinal light transmitting member, to which light emitted from said light source is incident, and a light radiation surface from which light is radiated to said original image, said longitudinal light transmitting member for guiding the incident light with reflection thereof from an inner surface of said longitudinal light transmitting member along the longitudinal direction of said light guide unit;
- and
- control means for controlling said image reader,
- wherein said light shielding member is a discrete member different from said frame.
Dependencies are inferred from the claim text.