Patents by Inventor Hirofumi Ishiyama

Hirofumi Ishiyama 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).

  • Resin-cemented optical element, mold therefor, fabrication process thereof, and optical article
    Patent number: 7931833
    Abstract: The present invention provides a resin-cemented optical element comprising a base member 10 and a resin layer 11 formed on the surface of the base member; the resin layer 11 being in a thickness of 300 ?m or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge face 17 of the resin layer 11, or a region outside an effective-diameter region), and being in a thickness 12 of 850 ?m or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: April 26, 2011
    Assignee: Nikon Corporation
    Inventors: Akiko Miyakawa, Hirofumi Ishiyama
  • RESIN-CEMENTED OPTICAL ELEMENT, MOLD THEREFOR, FABRICATION PROCESS THEREOF, AND OPTICAL ARTICLE
    Publication number: 20100007036
    Abstract: The present invention provides a resin-cemented optical element comprising a base member 10 and a resin layer 11 formed on the surface of the base member; the resin layer 11 being in a thickness of 300 ?m or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge face 17 of the resin layer 11, or a region outside an effective-diameter region), and being in a thickness 12 of 850 ?m or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.
    Type: Application
    Filed: September 22, 2009
    Publication date: January 14, 2010
    Applicant: Nikon Corporation
    Inventors: Akiko MIYAKAWA, Hirofumi Ishiyama
  • Resin-cemented optical element, mold therefor, fabrication process thereof, and optical article
    Patent number: 7622181
    Abstract: The present invention provides a resin-cemented optical element comprising a base member 10 and a resin layer 11 formed on the surface of the base member; the resin layer 11 being in a thickness of 300 ?m or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge face 17 of the resin layer 11, or a region outside an effective-diameter region), and being in a thickness 12 of 850 ?m or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: November 24, 2009
    Assignee: Nikon Corporation
    Inventors: Akiko Miyakawa, Hirofumi Ishiyama
  • Resin-cemented optical element, mold therefor, fabrication process thereof, and optical article
    Publication number: 20060019070
    Abstract: The present invention provides a resin-cemented optical element comprising a base member 10 and a resin layer 11 formed on the surface of the base member; the resin layer 11 being in a thickness of 300 ?m or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge face 17 of the resin layer 11, or a region outside an effective-diameter region), and being in a thickness 12 of 850 ?m or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.
    Type: Application
    Filed: July 7, 2005
    Publication date: January 26, 2006
    Applicant: Nikon Corporation
    Inventors: Akiko Miyakawa, Hirofumi Ishiyama
  • Resin-cemented optical element, mold therefor, fabrication process thereof, and optical article
    Publication number: 20020064575
    Abstract: NK1717 The present invention provides a resin-cemented optical element comprising a base member 10 and a resin layer 11 formed on the surface of the base member; the resin layer 11 being in a thickness of 300 &mgr;m or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge face 17 of the resin layer 11, or a region outside an effective-diameter region), and being in a thickness 12 of 850 &mgr;m or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.
    Type: Application
    Filed: November 29, 2001
    Publication date: May 30, 2002
    Applicant: Nikon Corporation
    Inventors: Akiko Miyakawa, Hirofumi Ishiyama