Patents by Inventor Kyu Takada

Kyu Takada 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).

  • Optical scanner
    Patent number: 5600476
    Abstract: An optical scanner for use in laser beam printers and the like which is particularly satisfactory in imaging characteristics. A light beam from a semiconductor laser passes through a collimator lens, an aperture diaphragm and a cylindrical lens. The beam is then deflected by a rotating lens mirror and subjected to the focusing action of an imaging lens so that it is focused to form a beam spot, which scans over a scan surface as the beam is deflected. The imaging lens has aspheric surfaces in the main-scanning cross section and is designed so that the rate of change in its curvature and other relevant parameters satisfy a predetermined equation so as to lie within a predetermined range.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: February 4, 1997
    Assignee: Seiko Epson Corporation
    Inventors: Kyu Takada, Nozomu Inoue, Takashi Hama, Yujiro Nomura
  • Single element beam scanning apparatus having entrance and exit faces and a reflecting face therebetween
    Patent number: 5528279
    Abstract: To enable scanning by a light beam with a single unit of rotating optics, a light beam issuing from semiconductor laser 1 is launched into rotating lens mirror 3 through entrance face S.sub.1, thence directed to reflecting face S.sub.2, whereby it is deflected to leave the lens mirror 3 through exit face S.sub.3 and form a spot that scans over the imaging plane.
    Type: Grant
    Filed: June 23, 1993
    Date of Patent: June 18, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Suzuki, Yujirou Nomura, Nozomu Inoue, Kyu Takada