There are disclosed systems for calibrating a first position measuring component on an imaging or scanning transducer with respect to the scanning plane. Calibrations are performed by using a calibrating device including an additional or second position measuring component, such that during the calibration...http://www.google.com/patents/US6311540?utm_source=gb-gplus-sharePatent US6311540 - Calibration method and apparatus for calibrating position sensors on scanning transducers
