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. 25, 1985
Filed:
Mar. 04, 1982
Applicant:
Inventor:
Nobuo Nishimura, Kanagawa, JP;
Assignee:
Fuji Xerox Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 44 ; 369 59 ; 369124 ; 375 87 ;
Abstract
An optical data recordation and reproduction system comprising a first optical means modulates a light beam with digitized data and impacts this modulated light beam onto a photosensitive material, producing discontinuities in the photosensitive material corresponding to the data. A second optical means then directs a beam of unmodulated light onto this photosensitive material, and converts the resulting modulated light into an electric signal. An electric circuit then differentiates and samples the signal, producing the recorded digitized data via self-locking.