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:
Jun. 14, 1994
Filed:
Nov. 02, 1993
Applicant:
Inventors:
Takeshi Mochizuki, Ibaraki, JP;
Susumu Saito, Ibaraki, JP;
Shinichi Nishino, Ibaraki, JP;
Takahiro Kikuchi, Ibaraki, JP;
Akira Arimoto, Tokyo, JP;
Assignees:
Hitachi Koki Co., Ltd., Tokyo, JP;
Hitachi Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; B41J / ;
U.S. Cl.
CPC ...
346108 ; 358298 ;
Abstract
A light scanning device has a light deflector for deflecting in a scanning mode a light beam outputted by a light source; and an optical system for image-forming on a scanning medium the light beam deflected by the light deflecting means, with a convergent or divergent light beam in an optical path between the light source and the scanning medium. A plane-parallel plate is moved into and out of the optical path of the convergent or divergent light beam, so as to change a beam spot diameter on the scanning medium.