Patents by Inventor Yuzuru Yuasa

Yuzuru Yuasa 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).

  • Laser scanning unit and image forming apparatus including the same
    Patent number: 9456104
    Abstract: A laser scanning unit includes a scanning lens, a control portion, and a storage portion. The control portion controls a light amount of a light beam emitted from a light source. The storage portion stores therein aberration characteristics representing a relationship between image heights of the scanning lens and a wavefront aberration amount, which have been obtained in advance. The control portion, when the scanning is performed, controls the light amount of the light beam in accordance with the aberration characteristics, such that the light amount is set to a predetermined first light amount, at a point of a first image height where the wavefront aberration amount has a first value, and the light amount is set to a second light amount larger than the first light amount, at a point of a second image height where the wavefront aberration amount has a second value larger than the first value.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: September 27, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yuzuru Yuasa
  • LASER SCANNING UNIT AND IMAGE FORMING APPARATUS INCLUDING THE SAME
    Publication number: 20160127595
    Abstract: A laser scanning unit includes a scanning lens, a control portion, and a storage portion. The control portion controls a light amount of a light beam emitted from a light source. The storage portion stores therein aberration characteristics representing a relationship between image heights of the scanning lens and a wavefront aberration amount, which have been obtained in advance. The control portion, when the scanning is performed, controls the light amount of the light beam in accordance with the aberration characteristics, such that the light amount is set to a predetermined first light amount, at a point of a first image height where the wavefront aberration amount has a first value, and the light amount is set to a second light amount larger than the first light amount, at a point of a second image height where the wavefront aberration amount has a second value larger than the first value.
    Type: Application
    Filed: October 27, 2015
    Publication date: May 5, 2016
    Inventor: Yuzuru Yuasa