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. 13, 1990
Filed:
Dec. 19, 1988
Claude Bricot, Villejuif, FR;
Thomson-CSF, Puteaux, FR;
Abstract
A method for recording pictures wherein a material to be scanned by a laser beam comprises a first layer laid on a substrate to form a picture zone and a reading zone and a second layer laid on the picture zone only which is capable of absorbing laser radiation. The laser beam is capable of double relative motion with respect to the above material with a first fast motion along a first axis and with a second motion, slow in comparison with the first motion, along a second axis which, for example, may be perpendicular to the first axis. The power of the laser beam is modulated as a function of the information to be recorded in synchronism with the above mentioned first motion. The laser beam is guided by information from the reading zone which describes the picture zone where the picture has to be formed in strips parallel to the first axis by the destruction or non-destruction of the absorbent layer thereon, thus causing the first layer to be revealed or not revealed depending on the power of the laser beam and, therefore, on the information to be recorded. After recording the reading zone is removed.