Patents by Inventor Sanae OKI

Sanae OKI 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 pickup optical system and image pickup apparatus using the same
    Patent number: 8964309
    Abstract: An image pickup optical system includes in order from an object side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power. An aperture stop is disposed nearest to the object side, and the first lens has a biconvex shape. An image-side surface of the third lens has in a peripheral portion, an area of which, a refractive power becomes weaker as compared to a refractive power of a central portion thereof. An object-side optical function surface of the fourth lens has a concave shape, and an object-side surface of the fifth lens has a concave shape.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: February 24, 2015
    Assignee: Olympus Corporation
    Inventors: Yoshihiro Uchida, Sanae Oki
  • IMAGE PICKUP OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS USING THE SAME
    Publication number: 20130242412
    Abstract: An image pickup optical system includes in order from an object side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power. An aperture stop is disposed nearest to the object side, and the first lens has a biconvex shape. An image-side surface of the third lens has in a peripheral portion, an area of which, a refractive power becomes weaker as compared to a refractive power of a central portion thereof. An object-side optical function surface of the fourth lens has a concave shape, and an object-side surface of the fifth lens has a concave shape.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 19, 2013
    Applicant: OLYMPUS CORPORATION
    Inventors: Yoshihiro UCHIDA, Sanae OKI