Please download the dossier by clicking on the dossier button x
×

Optical scanning apparatus, image forming apparatus, and methods of performing optical scanning using optical scanning apparatus and image forming apparatus

  • US 7,057,632 B2
  • Filed: 12/05/2000
  • Issued: 06/06/2006
  • Est. Priority Date: 12/10/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. An optical scanning apparatus comprising:

  • a laser unit having a laser source and an optical element configured to emit a substantially parallel beam of light;

    an incident optical system arranged to direct the light beam emerging from the laser unit to strike an optical deflector while maintaining a width of the light beam wider than a width of a deflecting surface of the optical deflector in a main scanning direction; and

    an imaging optical system for forming the light beam deflected by the optical deflector into an image on a scanned surface, wherein said laser unit is adapted to be moved in the main scanning direction without changing a direction of an optical axis of said incident optical system so as to make an illuminance distribution of scanning lines on the scanned surface become substantially symmetrical about a scanning central axis.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×