Patent Number: 6,252,682

Title: Document sensing device for an image forming apparatus

Abstract: A document sensing device for an image forming apparatus of the present invention is capable of sensing a document stably without being influenced by disturbing light, e.g., light ascribable to fluorescent lamps or similar illuminators illuminating a room. According to one aspect of die invention, optical elements are held by a jig rotatable about an optical axis. According to another aspect of the invention, a light receiving means or a photosensor means has at least four light-sensitive regions.

Inventors: Baba; Nobuyuki (Kanagawa, JP), Kudo; Koichi (Kanagawa, JP), Aoki; Sumiaki (Kanagawa, JP)

Assignee: Ricoh Company, Ltd.

International Classification: G03G 15/00 (20060101); H04N 1/00 (20060101); H04N 001/04 ()

Expiration Date: 06/26/2018