Patents by Inventor Yoshishige Wada

Yoshishige Wada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Return optical deflecting element, optical deflecting element and optical scanner
    Patent number: 5170278
    Abstract: Reflecting faces constituting one or more reflecting face pairs are respectively inclined at 45 degrees with respect to the rotational axis of an optical deflecting element. The reflecting faces are opposed to each other such that these reflecting faces are perpendicular to each other. The reflecting face pairs are arranged with axial symmetry with respect to the rotational axis. A light beam is incident to one of the reflecting faces in parallel to the rotational axis. This light beam is sequentially reflected on this one reflecting face and the other reflecting face constituting the reflecting face pairs together with this one reflecting face. Then, the light beam is returned from the other reflecting face in parallel to the rotational axis and is emitted as a deflected light beam. An optical scanner using the return optical deflecting element and an optical deflecting element is also shown.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: December 8, 1992
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshishige Wada, Nobuo Sakuma