Image sensor

An image sensor includes a light source (2a) ; a bar-shaped light-guiding element (2) having a first light-emitting section (3a), which propagates light from the light source (2a) and irradiates an document (1) from an oblique direction, and a second light-emitting section (4a) emitting light in a c...

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Bibliographic Details
Main Authors Ota, Akira, Fujiuchi, Akiko
Format Patent
LanguageEnglish
French
German
Published 10.09.2008
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:An image sensor includes a light source (2a) ; a bar-shaped light-guiding element (2) having a first light-emitting section (3a), which propagates light from the light source (2a) and irradiates an document (1) from an oblique direction, and a second light-emitting section (4a) emitting light in a carrying direction of the document (1) ; a lens (6) converging the light reflected from the document (1); a sensor (7) receiving the light passed through the lens (6); a reflector (23) disposed on the opposite side of the light-guiding element (2), by reflecting the light from the second light-emitting section (4a) such that an optical path of the light emitted from the second light-emitting section (4a) is located between the lens (6) and the document (1), and irradiating the document (1) from an oblique direction; and first and second light-scattering layers formed in areas opposed to the first and the second light-emitting sections (3a,4a), respectively, in the light-guiding element (23).
Bibliography:Application Number: EP20070119954