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:
Jul. 02, 2002
Filed:
Jul. 27, 2000
Nobuyuki Hori, Saitama-ken, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A multi-beam scanning device is provided with a plurality of light sources that emit a plurality of light beams, respectively, a scanning system that deflects each of the plurality of light beams to scan within a predetermined scanning range, a modulating system that modulates the plurality of light beams at a plurality of frequencies, respectively, and a beam detector positioned with in the scanning range to receive the plurality of light beams respectively modulated at different frequencies. The beam detector outputs a signal representing intensity of received light beams. A separating system is provided to separate the output signal of the beam detector, on a basis of the plurality of frequencies, into a plurality of component signals, and a synchronizing signal generating circuit that generates a plurality of synchronizing signals respectively corresponding to the plurality of light beams based on the plurality of component signals.