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:
Feb. 16, 1999
Filed:
Dec. 12, 1994
Claude Tinet, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The present invention concerns an arrangement for reading an optically readable carrier on which data is stored in the form of diffractive elements. The data elements each have a plurality of adjacent tracks on the carrier with data elements being positioned on adjacent tracks. The system utilizes an illumination device for projecting a light onto the carrier in order to obtain diffraction of light along the entire length of each of the data elements with an optical arrangement collecting light emerging from the carrier. The optical arrangement is configured and positioned so that light which emerges from the carrier is selectively collected as a function of the angular direction of light from the carrier. The collected light is converted into a data readout signal.