Patents by Inventor Muneo Fujita

Muneo Fujita 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).

  • Rotation information detecting apparatus and scale for use in the same
    Patent number: 5747797
    Abstract: A rotation information detecting apparatus has a scale having a cylinder or a disc member with a grating portion provided over the entire circumference thereof, and a light projecting unit for applying a light beam to the grating portion. The apparatus also includes a fist light receiving unit, having at least one sensor, disposed to receive a light beam from the light projecting unit which has passed through first and second areas of the grating portion or a grating portion provided on another member. The incremental relative rotation information between the scale and a unit including the light projecting unit and the first light receiving unit is obtained by the light reception of the first light receiving unit.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: May 5, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Muneo Fujita