| 摘要 |
A device for scanning a biological object, such as a fingerprint, is disclosed. One such device includes an array of acoustic waveguides and a piezoelectric array device. The piezoelectric array devices may be arranged in association with the waveguide array to provide ultrasonic energy in the form of an ultrasonic wave or collection of waves to the waveguide array, and also arranged to receive ultrasonic energy in the form of an ultrasonic wave or collection of waves from the waveguide array. The acoustic energy received by the piezoelectric array from the waveguide array may be energy that has been reflected from the biological object. A waveguide array according to the invention uses internal reflection to transmit the acoustic wave from one end of the waveguide array to another end of the waveguide array.
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