Patents by Inventor Toyotoshi Hirotani

Toyotoshi Hirotani 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).

  • Pattern indication using laser beam
    Patent number: 4550294
    Abstract: A method of visually representing output data on a screen by deflecting a laser beam in both horizontal and vertical directions for scanning, and an indicating device for performing the above method. The laser beam is first divided into two polarized waves which are, after being modulated in accordance with the output data, combined into a first synthesized laser beam. The two polarized waves are alternately extinguished synchronously with a predetermined simple harmonic oscillation. The synthesized laser beam is then horizontally deflected by means of a sinusoidally oscillating mirror so that the angular displacement of the deflection oscillates in synchronism with the predetermined simple harmonic oscillation. The resultant deflected beam is again divided into two polarized waves, one of which is then inverted. The resulting two polarized waves are combined to obtain a second synthesized laser beam whose angular displacement in deflection is unidirectional at any phase.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: October 29, 1985
    Assignee: Director-General of Agency of Industrial Science and Technology
    Inventors: Yoshiki Kishi, Toyotoshi Hirotani, Tomohiro Ohira, Yukio Fukui