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. 25, 1995
Filed:
Nov. 09, 1992
Hiroto Watanabe, Tokyo, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A light beam scanning system for use as a laser beam scanner in a laser beam printer has a polygonal mirror for deflecting a light beam emitted from a laser diode to scan a photosensitive drum with a scanning light beam. The scanning light beam is reflected by a mirror to a photodetector. In response to the reflected scanning light beam, the photodetector produces an output signal which is processed into a horizontal scanning signal to determine the timing to start writing information on the photosensitive drum with the scanning light beam. The photodetector has a detecting surface for receiving the reflected scanning fight beam. The detecting surface is oriented to prevent reflections therefrom of the reflected scanning light beam from traveling back to the light beam source through the mirror and the polygonal mirror.