An imaging device having a signal-processing section, an imaging section, and X- and Y-direction angle wire drivers. The imaging section sequentially form images of an object. The signal-processing section obtains X- and Y-direction displacements of the imaging section with respect to an object, from...http://www.google.de/patents/US5506912?utm_source=gb-gplus-sharePatent US5506912 - Imaging device capable of tracking an object
