Image reader with optional automatic document feeder

Image analysis – Image sensing

Patent

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Details

358496, 399110, G06K 920, G06K 700

Patent

active

057684480

ABSTRACT:
An image reader is provided with a reader body, an optional unit optionally and detachably attached to the reader body, an image sensor including a light receiving area on which a light is received, the light receiving area having a first light receiving area portion on which a light reflected on the original is received and a second light receiving area portion, the second light receiving area portion being arranged on the remaining portion of the light receiving area other than the first light receiving area portion, and control unit connected to the image sensor, for reading the image impression based on the detected result from the first light receiving area portion and for detecting the attachment of the optional unit to the reader body based on the detected result from the second light receiving area portion.

REFERENCES:
patent: 3824546 (1974-07-01), Kawasaki et al.
patent: 5311004 (1994-05-01), Kusaka
patent: 5323219 (1994-06-01), Hamanaka et al.
patent: 5436715 (1995-07-01), Yamada et al.
patent: 5555349 (1996-09-01), Miyasaka et al.
Japanese Patent Laid-Open Publiction HEI 04-264876, published Sep. 21, 1992 .

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