Patents by Inventor Ryouji Hirai

Ryouji Hirai 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).

  • Optical scanning device and image forming apparatus
    Patent number: 7817177
    Abstract: An optical scanning device includes a light source, a deflector that deflects a light beam from the light source, a first optical system that guides the light beam to the deflector, a second optical system that guides the light beam from the deflector to a surface to be scanned, and a housing that holds the light source and the deflector. At least one optical element included in the first optical system or the second optical system is attached to the housing via an intermediate member. The optical element is adjustable with respect to the intermediate member. The number of directions in which the optical element can be adjusted is two or more.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: October 19, 2010
    Assignee: Ricoh Company, Limited
    Inventors: Yoshinori Hayashi, Tomoya Ohsugi, Kenichiroh Saisho, Yasuhiro Naoe, Hiroyuki Okuwaki, Ryouji Hirai
  • Optical scanner and image forming apparatus
    Patent number: 7643191
    Abstract: An optical scanner that performs scanning by deflecting plural light beams using a single deflector. The optical scanner includes plural pre-scanning optical systems configured to emit the plural light beams and each including a light source. A first of the pre-scanning optical systems emits a first of the light beams to be deflected by the deflecting unit. A second of the pre-scanning optical systems emits a second of the light beams and is disposed in the position different from a position of the first pre-scanning optical system in a rotational axis direction of the deflector.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: January 5, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Okuwaki, Yasuhiro Naoe, Ryouji Hirai, Shinichi Ozaki, Jun Ando
  • OPTICAL SCANNER AND IMAGE FORMING APPARATUS
    Publication number: 20080130078
    Abstract: An optical scanner that performs scanning by deflecting plural light beams using a single deflector. The optical scanner includes plural pre-scanning optical systems configured to emit the plural light beams and each including a light source. A first of the pre-scanning optical systems emits a first of the light beams to be deflected by the deflecting unit. A second of the pre-scanning optical systems emits a second of the light beams and is disposed in the position different from a position of the first pre-scanning optical system in a rotational axis direction of the deflector.
    Type: Application
    Filed: October 16, 2007
    Publication date: June 5, 2008
    Inventors: Hiroyuki Okuwaki, Yasuhiro Naoe, Ryouji Hirai, Shinichi Ozaki, Jun Ando
  • OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS
    Publication number: 20060284968
    Abstract: An optical scanning device includes a light source, a deflector that deflects a light beam from the light source, a first optical system that guides the light beam to the deflector, a second optical system that guides the light beam from the deflector to a surface to be scanned, and a housing that holds the light source and the deflector. At least one optical element included in the first optical system or the second optical system is attached to the housing via an intermediate member. The optical element is adjustable with respect to the intermediate member. The number of directions in which the optical element can be adjusted is two or more.
    Type: Application
    Filed: May 10, 2006
    Publication date: December 21, 2006
    Inventors: Yoshinori Hayashi, Tomoya Ohsugi, Kenichiroh Saisho, Yasuhiro Naoe, Hiroyuki Okuwaki, Ryouji Hirai