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:
Nov. 06, 1984
Filed:
Jan. 17, 1983
William H Meise, Wrightstown, PA (US);
Robert A Dischert, Burlington, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
Two or more CCD imagers, which have random defects are optically coupled to form a single image. The CCD's are in registry. Because of the random nature of the location of the defects, the defective photosensors of one imager are aligned with good photosensors of another. Memories keep track of which locations of which CCD are defective. The imagers are operated synchronously and the signals from good photosensor locations are summmed for improved signal-to-noise ratio. When a location is addressed at which one imager has a defective photosensor, the respective memory decouples it from the good photosensor of the other imager. The signal level is restored for that pixel by increasing the gain of a preamp by the correct amount. If the imagers are made from the same mask, they may have almost identically corresponding defective photosensors. Then one imager is mounted upside-down relative to the other and scanned backwards so the defects do not coincide.