CORRECTION OF DIFFRACTION EFFECTS IN AN ULTRASONIC SENSOR

摘要

It is disclosed embodiment for correcting the diffraction effect of the ultrasonic sensor. In one embodiment, the ultrasonic sensor is a piezoelectric receiver layer configured to receive an ultrasonic transducer, a reflected wave of ultrasound that is configured to transmit an ultrasonic wave, the reflected wave is, the piezoelectric including a plurality of images of a fingerprint with a plurality of phase in the time sequence It may comprise a platen layer configured to protect the receiver layer, and an ultrasonic transmitter and receiver piezoelectric layer. The ultrasonic sensor may further include an ultrasonic sensor array, and the processor such that the processor of summing a plurality of images is multiplied by the complex phase factor to form a complex image of the integrated, and integration to form a complex image of the sorted complex image pre - to computing a maximum energy image for aligning the selected phase, and determining a maximum energy phase using a complex image aligned to, and express a fingerprint based, at least in part, to the complex image alignment in the maximum energy phase It is configured.