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. 20, 1982
Filed:
Jul. 14, 1980
Applicant:
Inventors:
Hiroshi Oono, Asaka, JP;
Masahiro Ohnishi, Asaka, JP;
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346108 ; 358302 ;
Abstract
In a laser beam recording system in which a laser beam is modulated by an acousto-optic modulator and the zero-order diffraction light beam is used to scan a recording material two-dimensionally for recording information, the zero-order diffraction light beam is vertically deflected to a light shielding mask located outside the recording area in the non-recording period. Thus, the horizontal scanning line is moved to the light shielding mask during the non-recording period and the recording material is prevented from being exposed to the attenuated zero-order diffraction light beam.