G - Physics – 01 – S
Patent
G - Physics
01
S
349/35
G01S 15/89 (2006.01) B06B 1/06 (2006.01) G01N 29/00 (2006.01) H04R 17/00 (2006.01)
Patent
CA 1164084
ABSTRACT OF THE DISCLOSURE 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 sub- stantially constant over a wide frequency range. A piezoelectric sheet 5 µm to 1000 µm 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 diff- erent frequencies in a frequency range around a fundamental reson- ance frequency of the piezoelectric sheet of ?10 to ?70% of the fundamental resonance frequency.
365405
Endo Yasushi
Kikuchi Kazushige
Nagura Masato
Obara Hiroshi
George H. Riches And Associates
Kureha Kagaku Kogyo Kabushiki Kaisha
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