Patents by Inventor Chang S. Jegal

Chang S. Jegal 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).

  • Iris recognition lens system
    Patent number: 9864179
    Abstract: An iris recognition lens system including a first lens and a second lens disposed on an optical axis and sequentially from an object to take an image of an iris and a pupil. A front part of the first lens includes a reflecting area in a central portion and a transmitting area in a circumferential portion. A rear part of the first lens includes a concave transmitting area in a central portion and a reflecting area in a circumferential portion. The second lens is disposed at a rear of the transmitting area in the central portion of the rear part of the first lens. A plurality of reflecting areas and a plurality of transmitting areas are provided in a single lens in order to reduce the length of the lens and increase a focal length, thereby reducing the length of the entire iris recognition lens system.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: January 9, 2018
    Assignee: SEKONIX CO., LTD.
    Inventors: Soon Chul Choi, Chang S. Jegal, Yang S. Kim, Young J. Lee
  • IRIS RECOGNITION LENS SYSTEM
    Publication number: 20160187631
    Abstract: An iris recognition lens system including a first lens and a second lens disposed on an optical axis and sequentially from an object to take an image of an iris and a pupil. A front part of the first lens includes a reflecting area in a central portion and a transmitting area in a circumferential portion. A rear part of the first lens includes a concave transmitting area in a central portion and a reflecting area in a circumferential portion. The second lens is disposed at a rear of the transmitting area in the central portion of the rear part of the first lens. A plurality of reflecting areas and a plurality of transmitting areas are provided in a single lens in order to reduce the length of the lens and increase a focal length, thereby reducing the length of the entire iris recognition lens system.
    Type: Application
    Filed: April 10, 2015
    Publication date: June 30, 2016
    Applicant: Sekonix Co., Ltd.
    Inventors: Soon Chul Choi, Chang S. Jegal, Yang S. Kim, Young J. Lee