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:
Sep. 21, 1993
Filed:
Sep. 14, 1990
Applicant:
Inventors:
Masatoshi Iwama, Shizuoka, JP;
Akira Morimoto, Tokyo, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358471 ; 358481 ; 358484 ;
Abstract
A scanning optical system has a drawing light source, a rotary scanning deflector, a scanning lens and a detection device for detecting a rotational position of the scanning deflector. The drawing light source is controlled by a timing control signal generated by a timing control device as a function of drawing data. The scanning optical system may have a transmission scale, a scanning light receiving portion and a diffusion plate disposed between transmission scale and scanning light receiving portion and adapted to diffuse the monitor beam made incident to the scanning light receiving portion.