Image sensor IC having linearly and obliquely disposed light receiving elements and contact image sensor using same

A contact image sensor comprising:

• an image sensor IC having light receiving elements disposed linearly adjacent to each other on a surface of a quadrilateral semiconductor substrate having two sets of opposite parallel sides and corresponding sets of opposite vertices, and disposed oblique to said two sets of opposite sides from a first predetermined position adjacent one side of one of the two sets of opposite sides, to be opposed in said semiconductor substrate to a second predetermined position adjacent the other side of said one of the two sets of opposite sides, the first and second predetermined positions being closer to vertices of one set of opposite vertices than the other set of opposite vertices, and an interpolation element provided at an end portion of said one side or said other side on a side of a region in which an angle formed by said linearly disposed light receiving elements and said one side or said other side is obtuse, said interpolation element having an oblique angle to the linearly disposed light receiving elements and receiving light on an outer side of said linearly disposed light receiving elements;
• a lens body disposed along said light receiving elements of said image sensor IC, and converging light reflected by an irradiation subject conveyed in a conveyance direction to cause said image sensor IC to receive said light;
• a sensor substrate on which said image sensor IC is mounted;
• and
• a plurality of said semiconductor substrates arranged at an equal pitch, said light receiving elements and said interpolation elements of the plurality of semiconductor substrates respectively extending in a straight line.