Patent ID: 8134755

Claim:
An image reading apparatus comprising: a first reading device which includes a first imaging unit and a first light receiving sensor, the first imaging unit for imaging light reflected from a first image surface of a document on to the first light receiving sensor, the first light receiving sensor for performing a photoelectric conversion of the imaged light by the first imaging unit; and a second reading device which includes a second imaging unit and a second light receiving sensor, the second imaging unit for imaging light reflected from a second image surface of the document on to the second light receiving sensor, the second light receiving sensor for performing a photoelectric conversion of the imaged light by the second imaging unit, wherein the first imaging unit and the second imaging unit include an off-axial reflecting surface having a curvature, and wherein an incident direction of a reference axis light beam differs from an outgoing direction of the reference axis light beam in the first imaging unit and the second imaging unit; and wherein the first imaging unit and the second imaging unit are respectively disposed in the first reading device and the second reading device so that an incident position is located below an outgoing position.