Patents by Inventor Hatsuichi Takeyasu

Hatsuichi Takeyasu 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).

  • Micro-Molding Equipment and Micro-Molding Method
    Publication number: 20080067704
    Abstract: The micro-molding equipment contains a preform molding equipment 10 taking a single-cavity of a preform material 3 corresponding to a small precision optical component to be molded with a runnerless mold, and a precision compression molding equipment 40 for after molding the preform material 3 by primary compression molding in a vacuum state, cooling the preform material to a temperature near a glass transition point, and then re-softening a surface layer of the preform material and molding the same by secondary compression molding to transfer the small precision optical component thereto.
    Type: Application
    Filed: October 18, 2005
    Publication date: March 20, 2008
    Applicants: RIKEN, THE NEXSYS CORPORATION, SAN SEIMITSU KAKO LAB., LTD., IKEGAMI MOLD ENGINEERING CO., LTD., ASTOM R&D
    Inventors: Hitoshi Ohmori, Yoshihiro Uehara, Weimin Lin, Hatsuichi Takeyasu, Masao Washio, Keizo Ikegami, Takeya Shoji, Tomoaki Ando, Yukihiro Shirataki
  • Polygonal mirror
    Patent number: 5517365
    Abstract: A polygonal mirror according to the present inventio is provided with a mirror body, a plurality of reflection faces formed to side surfaces of the mirror body, and reinforcing ribs integrally formed to both the upper and lower surfaces of the mirror body, respectively. Each of the reinforcing ribs has an outer circumference that is larger than the outer circumference of the mirror body.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: May 14, 1996
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Hatsuichi Takeyasu
  • Polygonal mirror
    Patent number: 5361170
    Abstract: A polygonal mirror according to the present invention is provided with a mirror body, a plurality of reflection faces formed to side surfaces of the mirror body, and reinforcing ribs integrally formed to both the upper and lower surfaces of the mirror body, respectively. Each of the reinforcing ribs has an outer circumference that is larger than the outer circumference of the mirror body.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: November 1, 1994
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Hatsuichi Takeyasu
  • Polygonal mirror and method of making same
    Patent number: 4884856
    Abstract: A polygonal mirror comprising a mirror body in the form of a regular prism. A plurality of side faces of the regular prism are formed respectively into reflecting faces. During rotation of the mirror body about its central axis, the reflecting faces successively deflect an indicent light ray to cause the deflected light ray to carry out scanning. A flange is integrally provided on the mirror body, and has a size at least equal to a circle circumscribing the regular prism in a plane perpendicular to the central axis.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: December 5, 1989
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Hatsuichi Takeyasu, Kenichi Sakata, Fumitoshi Yura