Patents by Inventor Tatsuo Saimi

Tatsuo Saimi 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).

  • Recording and/or reproduction apparatus
    Patent number: 6738324
    Abstract: A recording and/or reproduction apparatus, for an information medium including a substrate having concave and convex portions and a plurality of recording layers, includes a light source for emitting a light beam; an optical system for diffracting the light beam emitted by the light source so as to output a first diffracted light beam and a plurality of second diffracted light beams; and a driving section for driving the optical system. The optical system outputs the first diffracted light beam and the second diffracted light beams, such that when one of the second diffracted light beams is converged to and reflected by one of the concave and convex portions, the first diffracted light beam is converged to one of the recording layers. The driving section drives the optical system, such that the one of the second diffracted light beams is converged to the one of the concave and convex portions.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: May 18, 2004
    Assignee: Matsushita Electric Industrial Co.
    Inventors: Tatsuo Saimi, Teruhiro Shiono, Hiroaki Yamamoto
  • Recording and/or reproduction apparatus
    Publication number: 20020181352
    Abstract: A recording and/or reproduction apparatus, for an information medium including a substrate having concave and convex portions and a plurality of recording layers, includes a light source for emitting a light beam; an optical system for diffracting the light beam emitted by the light source so as to output a first diffracted light beam and a plurality of second diffracted light beams; and a driving section for driving the optical system. The optical system outputs the first diffracted light beam and the second diffracted light beams, such that when one of the second diffracted light beams is converged to and reflected by one of the concave and convex portions, the first diffracted light beam is converged to one of the recording layers. The driving section drives the optical system, such that the one of the second diffracted light beams is converged to the one of the concave and convex portions.
    Type: Application
    Filed: May 20, 2002
    Publication date: December 5, 2002
    Inventors: Tatsuo Saimi, Teruhiro Shiono, Hiroaki Yamamoto