Patent ID: 6965466
Filing Date: 2005-11-15
Classification: B41J,G02B

Abstract:
1. A multi-beam scanner comprising: a light source for emitting a plurality of light beams; a deflector for deflecting the plurality of light beams emitted from said light source; and a scanning optical system for guiding the plurality of light beams that have been deflected by said deflector onto a scan surface; a first light shielding member for determining one end of a diameter of at least one of the plurality of light beams; a second light-shielding member for determining the other end of the diameter of the at least one of the plurality of light beams; a synchronism detector for detecting synchronism by receiving the plurality of light beams deflected by said deflector; and a synchronism detecting diaphragm for limiting diameters of the plurality of light beams incident upon said synchronism detector, wherein said first light-shielding member and said second light-shielding member are used to limit the diameter of the at least one of the plurality of light beams and are disposed apart from each other in a direction in which the light beams propagate, and wherein said synchronism detecting diaphragm is disposed between said deflector and said synchronism detector.