Patents by Inventor Hiroyuki Tuda

Hiroyuki Tuda 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 signal processing circuit and method of producing same
    Patent number: 7116852
    Abstract: A novel two-dimensional optical signal processing circuit which becomes possible only by the introduction of a concave, flat or convex reflecting structure; and a method of producing the same. Disposed on an optical wave-guiding circuit board (50) formed with an output wave-guiding path (13) and an input wave-guiding path (14) are the optical axes of the input coupling end (I) and output coupling end (U) of a coupling circuit (15) such that the optical axes pass through the same point (Q) on a reflection structure (16), the reflection structure (16) being fabricated by using a laser ablation device (30).
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: October 3, 2006
    Assignee: Keio University
    Inventor: Hiroyuki Tuda
  • Optical signal processing circuit and method of producing same
    Publication number: 20040047561
    Abstract: A novel two-dimensional optical signal processing circuit which becomes possible only by the introduction of a concave, flat or convex reflecting structure; and a method of producing the same. Disposed on an optical wave-guiding circuit board (50) formed with an output wave-guiding path (13) and an input wave-guiding path (14) are the optical axes of the input coupling end (I) and output coupling end (U) of a coupling circuit (15) such that the optical axes pass through the same point (Q) on a reflection structure (16), the reflection structure (16) being fabricated by using a laser ablation device (30).
    Type: Application
    Filed: June 30, 2003
    Publication date: March 11, 2004
    Inventor: Hiroyuki Tuda