Image reading apparatus, image reading method, and image forming apparatus
AssigneesToshiba Tec Kabushiki Kaisha, Kabushiki Kaisha Toshiba
InventorsHiroyuki Shiraishi, Mitsuru Hatano, Sueo Ueno, Katsuya Nagamochi, Yusuke Hashizume, Naoya Koseki
Life of this patent
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Abstract
According to one embodiment, an image reading apparatus includes an original document table on which an original document is placed, a detection light source configured to be disposed above the original document table, an irradiation optical system configured to irradiate the original document table with light from the detection light source from a lower surface side of the original document table, and a light guiding optical system configured to guide light reflected from the original document table toward a light detector.
Claims19
An image reading apparatus comprising:
- an original document table on which an original document is placed;
- a detection light source configured to be disposed above the original document table;
- an irradiation optical system configured to irradiate the original document table with light from the detection light source from a lower surface side of the original document table;
- and
- a light guiding optical system configured to guide light reflected from the original document table toward a light detector.
An image reading method comprising:
- forming a detection light source above an original document table on which an original document is placed;
- irradiating the original document table with light from the detection light source from a lower surface side of the original document table by an irradiation optical system;
- and
- guiding light reflected from the original document table toward a light detector by a light guiding optical system.
An image forming apparatus comprising:
- an original document table on which an original document is placed;
- a detection light source configured to be disposed above the original document table;
- an irradiation optical system configured to irradiate the original document table with light from the detection light source from a lower surface side of the original document table;
- a first light guiding optical system configured to guide light reflected from the original document table toward a light detector;
- an exposure lamp configured to expose the original document table;
- a carriage configured to move the exposure lamp along the original document table;
- a second light guiding optical system configured to guide the light reflected from the original document table to the light detector with the exposure and movement of the exposure lamp;
- and
- an image forming unit configured to form an image corresponding to an image signal output from the light detector on an image-formed medium.
Dependencies are inferred from the claim text.