Patents by Inventor Sanae OHKI

Sanae OHKI 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).

  • Image taking optical system and image pickup apparatus equipped with same
    Patent number: 8497931
    Abstract: An image taking optical system includes, in order from the object side, a stop, a first lens having a biconvex shape and having a positive refractive power, a second lens having a concave surface facing the image side and having a negative refractive power, a third lens having a convex surface facing the image side and having a positive refractive power, and a fourth lens having a negative refractive power. The image taking optical system satisfies the conditional expression “0.6<d5/(d5+d6)<0.8”, where d5 is the air distance between the second lens and the third lens on the optical axis, and d6 is the thickness of the third lens.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: July 30, 2013
    Assignee: Olympus Corporation
    Inventor: Sanae Ohki
  • IMAGE TAKING OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS EQUIPPED WITH SAME
    Publication number: 20120069239
    Abstract: An image taking optical system includes, in order from the object side, a stop, a first lens having a biconvex shape and having a positive refractive power, a second lens having a concave surface facing the image side and having a negative refractive power, a third lens having a convex surface facing the image side and having a positive refractive power, and a fourth lens having a negative refractive power. The image taking optical system satisfies the conditional expression “0.6<d5/(d5+d6)<0.8”, where d5 is the air distance between the second lens and the third lens on the optical axis, and d6 is the thickness of the third lens.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 22, 2012
    Applicant: OLYMPUS CORPORATION
    Inventor: Sanae OHKI