Patents by Inventor Shohei Kikuchi

Shohei Kikuchi 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).

  • Publication number: 20170108680
    Abstract: A zoom lens, including, in order from an object side: a negative first unit being not moved for zooming; a second unit including at least one sub-unit that is moved during zooming, and having a positive refractive power as a whole; a negative third unit including an aperture stop, being not moved for zooming; a fourth unit including at least one sub-unit and being moved during zooming; and a fifth unit being not moved for zooming, at least three sub-units among the sub-units included in the second and fourth units being moved during zooming, in which focal lengths of the first and third units, and a movement amount of a sub-unit that is moved most in the second unit and a movement amount of a sub-unit that is moved most in the fourth unit during zooming from a wide angle end to a telephoto end satisfy predetermined conditions.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 20, 2017
    Inventors: Shohei KIKUCHI, Shoichi TAKEMOTO
  • Patent number: 9310589
    Abstract: Provided is an image pickup apparatus including, in order from an object side: a first lens unit; a stop; a second lens unit having a positive refractive power; and an image pickup element. The second lens unit includes a second lens sub-unit including only at least one positive lens. A refractive index (N2a) at a d-line of every lens included in the second lens sub-unit, an Abbe constant (?2a) and a partial dispersion ratio (?2a) of the every lens, a temperature-related relative refractive index change (dn2a/dTrelative) at the d-line, a focal length (f) of the overall system, a focal length (f2a) of the second lens sub-unit, an overall length (TD) of an image pickup lens, and a distance (BF) from an image-side surface of a lens arranged closest to an image side in the image pickup lens to an image plane of the image pickup element satisfy predetermined relationships.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: April 12, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tsuyoshi Wakazono, Shohei Kikuchi
  • Publication number: 20150362710
    Abstract: A zoom lens including, in order from an object side: a positive first lens unit not moving for zooming; a negative second lens unit moving during zooming; a negative third lens unit moving during zooming; and a fourth lens unit not moving for zooming and including an aperture stop, the fourth lens unit including first and second sub-lens units arranged on object side and image plane side of the aperture stop, respectively, in which a relationship between a maximum height of an axial ray from an optical axis in the first sub-lens unit when focusing at infinity at a wide angle end, and a maximum height of an axial ray at the aperture stop when focusing at infinity at the wide angle end and of full open aperture, and a lateral magnification of the fourth lens unit when focusing at infinity at the wide angle end are appropriately set.
    Type: Application
    Filed: June 8, 2015
    Publication date: December 17, 2015
    Inventor: Shohei Kikuchi
  • Publication number: 20140293123
    Abstract: Provided is an image pickup apparatus including, in order from an object side: a first lens unit; a stop; a second lens unit having a positive refractive power; and an image pickup element. The second lens unit includes a second lens sub-unit including only at least one positive lens. A refractive index (N2a) at a d-line of every lens included in the second lens sub-unit, an Abbe constant (?2a) and a partial dispersion ratio (?2a) of the every lens, a temperature-related relative refractive index change (dn2a/dTrelative) at the d-line, a focal length (f) of the overall system, a focal length (f2a) of the second lens sub-unit, an overall length (TD) of an image pickup lens, and a distance (BF) from an image-side surface of a lens arranged closest to an image side in the image pickup lens to an image plane of the image pickup element satisfy predetermined relationships.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 2, 2014
    Inventors: Tsuyoshi Wakazono, Shohei Kikuchi
  • Publication number: 20090154411
    Abstract: A terminal apparatus includes: a reception unit configured to receive a signal from a base station; a channel estimation unit configured to estimate a state of a channel based on a received signal; a storage configured to store a codebook including channel state values; an index of search number acquisition unit configured to acquire index of search number of candidates to be selected from among the channel state values for a correlation calculation with the estimated state value; a candidate selecting unit configured to select candidates for which the correlation calculation should be performed from among the channel state values according to the index of search number; a correlation calculation unit configured to calculate a correlation between the estimated state value and each of selected candidates; a selection unit configured to select a candidate having a highest correlation value; and a reporting unit configured to report a selected candidate to the base station.
    Type: Application
    Filed: September 15, 2008
    Publication date: June 18, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shohei Kikuchi, Yasuhiko Tanabe
  • Publication number: 20090088174
    Abstract: A wireless communication apparatus performs simultaneous communication with a plurality of communication terminals by using the same frequency band. The apparatus including: a reception unit that receives feedback information from each of the communication terminals; an acquisition unit that acquires a correlation value between the latest feedback information and the feedback information previously stored in a storage unit for each of the communication terminals; a measurement unit that measures a delay time relating to the feedback information; a generation unit that generates a reliability parameter representing degree of error that is allowed in the feedback information based on the correlation value and the delay time; and a selection unit that selects two or more of the communication terminals from among the plurality of the communication terminals based on the reliability parameter.
    Type: Application
    Filed: August 21, 2008
    Publication date: April 2, 2009
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shohei KIKUCHI, Yasuhiko Tanabe
  • Publication number: 20080298441
    Abstract: A radio communications apparatus executing transmit beam forming includes a receiver which receives an estimate value of a propagation path response, a computer which calculates a weighting matrix to be used for the transmit beam forming, in accordance with the estimate value, a correcting unit which corrects a component, of components of the weighting matrix, and a beam forming unit which executes beam forming using the weighting matrix corrected by the correcting unit and executes radio transmission.
    Type: Application
    Filed: March 25, 2008
    Publication date: December 4, 2008
    Inventors: Shohei Kikuchi, Yasuhiko Tanabe