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:
Oct. 18, 1977
Filed:
Feb. 20, 1976
John Charles Butler, Centerville, OH (US);
Lysle Dwight Cahill, Dayton, OH (US);
Ernest Warren Drumm, Dayton, OH (US);
Arnold Leroy Fife, Jamestown, OH (US);
Vincent James Paul, Jr, Kettering, OH (US);
The Mead Corporation, Dayton, OH (US);
Abstract
A scanning and printing system scans and digitizes graphical information for recording on magnetic tape and also prints graphical information previously stored in digital form on a magnetic tape. Scanning and printing is accomplished by directing a laser beam through a pinhole in an aperture plate and thence through a set of optics, which collimate the beam and scan it across the surface of a graphic medium. For operation as a printer the laser beam is addressed by an acousto-optic modulator, which is positioned between the laser and the aperture plate. The acousto-optic modulator causes a shifting of the laser beam in accordance with digitized data trains representing positive and negative areas in an image to be reproduced. The laser beam is normally blanked out by the aperture plate and is periodically shifted by the acoustic-optic modulator for direction through the pinhole.