Ultrasonic holography imaging device having a macromolecular pie

Details Ultrasonic holography imaging device having a macromolecular pie Ultrasonic holography imaging device having a macromolecular pie

1980-11-04

1983-10-25

Miller, J. D.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

128660, H01L 4100

Patent

active

044121474

ABSTRACT:
An ultrasonic image device such as may be used in a holography system or scanning system and having a piezoelectric transducer in which the conversion efficiency and phase are substantially constant over a wide frequency range. A piezoelectric sheet 5 .mu.m to 1000 .mu.m thick is used for a piezoelectric element. The piezoelectric sheet is constructed of a macromolecular material including polymers and copolymers of polar monomers. A high frequency signal input device applies to the electrodes coupled to the piezoelectric sheet high frequency signals of different frequencies in a range around a fundamental resonance of the piezoelectric sheet of .+-.10 to .+-.70% of the fundamental resonance frequency.

REFERENCES:
patent: 3564904 (1971-02-01), Brenden et al.
patent: 3973235 (1976-08-01), van der Burgt
patent: 3990296 (1976-11-01), Erikson
patent: 4123681 (1978-10-01), Barlow
patent: 4268653 (1981-05-01), Uchidoi et al.
patent: 4296349 (1981-10-01), Nakanishi et al.

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