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:
Dec. 09, 2008
Filed:
Aug. 07, 2006
Felix Lustenberger, Cham, CH;
Thierry Oggier, Zurich, CH;
Guido Becker, Losheim am See, DE;
Laurent Lamesch, Reichlange, LU;
Felix Lustenberger, Cham, CH;
Thierry Oggier, Zurich, CH;
Guido Becker, Losheim am See, DE;
Laurent Lamesch, Reichlange, LU;
Mesa Imaging AG, Zurich, CH;
IEE, Luxembourg, LU;
Abstract
The method serves for canceling errors caused by mismatch of different signal paths in a photodetector with a plurality (k) of storage elements for the photogenerated signals, as typically used in phase-measurement systems. The signal-capturing process is performed in at least two measurement cycles (j) . A first cycle (j=1) is executed with the conventional setup with no phase delay in the control signals. It is followed by further measurement cycles (j=2, 3, 4) which use control signals shifted by a constant phase shift (90°). Corresponding signals are read out through different signal paths. At the end, the signals corresponding to a certain phase (Φ) are added, thus canceling possible offset values.