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. 06, 1993
Filed:
Dec. 27, 1990
Applicant:
Inventors:
Jiro Egawa, Yokosuka, JP;
Naoaki Ide, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ; G03G / ;
U.S. Cl.
CPC ...
346108 ; 250205 ; 372 31 ;
Abstract
In an apparatus for adjusting the intensity of a light beam, the light beam from a semiconductor laser is deflected to scan a photosensitive drum and is detected to generate a positional signal by a photodetector outside of the drum. The intensity of the light beam is also detected by a monitor detector and compared with a predetermined value. The comparison result is latched in a latch circuit in accordance with the positional signal and the semiconductor laser is controlled depending on the latched comparison result.