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:
Mar. 06, 1979
Filed:
May. 28, 1976
Applicant:
Inventors:
Claude Bricot, Paris, FR;
Jean C Lehureau, Paris, FR;
Assignee:
Thomson-Brandt, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; G11B / ;
U.S. Cl.
CPC ...
358128 ; 1791 / ;
Abstract
The present invention relates to systems for the optical read-out, by reflection, of a data carrier. The present invention provides a read-out system in which two spots are projected which straddle the track being read-out. This method of projection makes use of a projection objective lens associated with an optical deflecting element in the form of a prism or a plate with parallel faces. The beam illuminating the track is split into two halves by a plane section containing the optical axis of the objective lens. The invention may be used for reading out data carriers upon which television signals are recorded.