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:
Apr. 09, 1985
Filed:
Sep. 14, 1982
Applicant:
Inventor:
Jean-Pierre Lazzari, Montfort l'Amaury, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360114 ; 360137 ;
Abstract
An optoelectronic device for reading data contained on the magnetic surface f a carrier comprises a source (SLP.sub.i) for emitting a beam of polarized light and means (MDK.sub.i) for detecting the angle of rotation of the polarization plane of the light. An optical focusing lens is provided for focusing onto a large observation field to enable simultaneous viewing of a plurality of tracks and a plurality of data on each track. Projection lenses (MPROJ.sub.i) enable projection of the image of the surface viewed by the optical means onto a plane P where optoelectronic transducers (TRPE.sub.ij) have been set up. The transducers may be arranged in a matrix or along a straight line.