IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS INCLUDING THE SAME

• Main Authors: IGUCHI KAZUHIRO, NAKANISHI KENJI, IMOTO MASAHIRO, FUKUTOME SHOICHI, SUDO YASUHIRO, KURUMA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 12.01.2016
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CALCULATING; CINEMATOGRAPHY; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To provide an image reading device that can sufficiently prevent stray light while preventing deviation of an optical axis due to interference between a frame and a mirror and vignetting of reading light on a mirror reflection surface side.SOLUTION: In a reflection part that reflects reading light to a reading part, a first light shielding part (81a) is arranged, with a gap, opposite to an end face of a first reflection mirror (51) that reflects light from a document first. This configuration can suppress stray light from entering from the end face of the first reflection mirror (51). Provision of a second light shielding part (81b) between the gap and a second reflection mirror (52) can effectively prevent stray light entered from the gap. 【課題】フレームとミラーとの干渉による光軸ずれやミラー反射面側での読取光のケラレを防止しつつ、十分に迷光を防止することが可能な画像読取り装置及び画像形成装置を提供する。【解決手段】読取光を読取部に向けて反射する反射部のうち、原稿からの光を最初に反射する第１の反射ミラー（５１）の端面に対して、間隙を設けながら第１の遮光部（８１ａ）を対向させて配置する。これにより、第１反射ミラー（５１）の端面から迷光が入り込むことを抑制できる。また、間隙と第２の反射ミラー（５２）との間に第２の遮光部（８１ｂ）を設けることで、間隙から入り込んだ迷光を効果的に防止できる。【選択図】図７