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:
Feb. 16, 1993
Filed:
Mar. 14, 1991
Applicant:
Inventors:
Koji Tanimoto, Kawasaki, JP;
Kazuo Sasama, Kawasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; H04N / ;
U.S. Cl.
CPC ...
346108 ; 355200 ;
Abstract
According to this invention, optical the path lengths from two semiconductor laser oscillators to a photosensitive body are different from each other. Oscillation is switched between the two semiconductor laser oscillators to change the beam shape of a laser beam on the photosensitive body. Since the beam shape of the laser beam can be controlled at accurate timings, a good image can be obtained, and a thin line and a high quality gradation image can be reproduced on a single image. An image having no gradation levels and an image having gradation levels can be simultaneously formed both with high quality.