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. 18, 2003
Filed:
Sep. 08, 2000
Paul A Manning, Malvern, GB;
Qinetiq Limited, London, GB;
Abstract
An imager is disclosed comprising: one or more detectors, a shutter adapted to open and close periodically to modulate the radiation incident upon the detector element to produce a sequence of alternating open fields and closed fields, said detector being adapted to produce a first pair of output signals V and V comprising an open field and a closed field, and a second pair of output signals V and V comprising an open and a closed field, a reset device adapted to reset the output of the detecting element to a predetermined voltage after the output signals of V , V , V and V have all been obtained, there being no reset of the output of the detecting element between the output signals V , V , V and V , and a processor adapted to process said first and second pairs of output signals to produce a first and a second processed image signal from the detecting element, the first processed image signal corresponding to the first pair of fields and the second processed image signal corresponding to the second pair of fields. The four signals provide sufficient information to produce images,which are free from reset KTC noise whilst removing the effects of ramp voltages produced by current leakage across the detectors.