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. 29, 1986
Filed:
Jan. 23, 1984
Don B Neumann, Laguna Beach, CA (US);
Richard P Eddy, Gardena, CA (US);
Excellon Industries, , CA (US);
Abstract
The image formed by a laser flying spot scanner on a photosensitive medium is subject to error in size and/or position because of deviation of the photosensitive surface from a nominal position. The deviation will occur if the substrate carrying the photosensitive surface does not have a uniform thickness. In a scanning system having a code mask that produces reference signals for controlling timing of writing beam modulation, compensation for the error is provided by maintaining a fixed distance between the code mask and the surface of the medium. The code mask floats freely upon the medium surface to move up and down with height variations of the surface as the medium passes under the code member and under the writing beam. Alternatively, the platen that supports the photosensitive medium is allowed to float and is continuously urged upwardly against spacing or position sensing devices to maintain the medium surface at a fixed distance from the mask.