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:
Jan. 07, 1992
Filed:
Aug. 03, 1989
Naoki Kawawada, Tokyo, JP;
Seiko Instruments Inc., , JP;
Abstract
A laser beam scanning device is comprised of a laser beam source for emitting a laser beam, a polygon mirror rotatable for reflecting the laser beam to deflect the same linearly in primary scanning direction and a main motor for rotating the polygon mirror. An optically converging system converges the laser beam reflected from the polygon mirror onto a photosensitive medium. A secondary scanning system includes a driving source having a pulse motor for shifting the laser beam relative to the photosensitive medium in secondary scanning direction substantially perpendicular to the primary scanning direction to thereby scan the laser beam two-dimensionally on the photosensitive medium. A controlling circuit produces a common clock signal for controlling and driving the main motor and the pulse motor according to the common clock signal.