The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2005
Filed:
Jan. 12, 2001
Koji Ito, Motosu-gun, JP;
Ryota Kato, Nagoya, JP;
Yasuo Tamaru, Nagoya, JP;
Yutaka Hattori, Kuwana, JP;
Koji Ito, Motosu-gun, JP;
Ryota Kato, Nagoya, JP;
Yasuo Tamaru, Nagoya, JP;
Yutaka Hattori, Kuwana, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A laser beam scanner converges a laser beam by using a first fθ lens and a second fθ lens in a main-scanning direction and in a sub-scanning direction, respectively, onto a photosensitive medium, thereby forming a scanning line on the photosensitive medium along the main-scanning direction. Before scanning the photosensitive medium, the laser beam that has passed through and been converged by the first fθ lens, but not passed through the second fθ lens, is guided to a beam detector and converged by a cylinder lens in the sub-scanning direction so that the laser beam falls within a detection area of the beam detector. The beam detector determines a scan start time by detecting the laser beam.