| 摘要 |
A device for scanning a biological object, such as a fingerprint, is disc losed. One such device includes an array of acoustic waveguides and a piezoe lectric array device. The piezoelectric array devices may be arranged in ass ociation with the waveguide array to provide ultrasonic energy in the form o f 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 b y the piezoelectric array from the waveguide array may be energy that has be en reflected from the biological object. A waveguide array according to the invention uses internal reflection to transmit the acoustic wave from one en d of the waveguide array to another end of the waveguide array.
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