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:
Jan. 16, 1979
Filed:
Mar. 12, 1973
Hartwig Ruell, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A method for coded, sequential, non-coherent, redundant, optical data storage wherein a number of one-dimensional holograms is recorded in a timed succession upon a light-sensitive tape through the utilization of a pulse amplitude-modulated light beam and a correction light beam of the light-sensitive tape is separately effected from the signal beam with respect to space and time in such a way that the entire exposure resulting from the signal exposure beam and the correction exposure beam is constant during each recordation, and wherein either the pulse amplitude- modulated light beam or the correction exposure beam are modulated with a noise intensity with respect to time in such a way that the contrast of the individual recorded holograms varies statistically.