Piezoelectric acoustic transducer with spherical lens

Details Piezoelectric acoustic transducer with spherical lens Piezoelectric acoustic transducer with spherical lens

1980-04-30

1983-05-17

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310337, 29 2535, H01L 4108

Patent

active

043842313

ABSTRACT:
An acoustic spherical lens wherein a hemispherical hole is formed from a bubble which appears owing to the expansion of resudual gases in a lens material employing silica, and the hemispherical hole is used as a lens surface.

REFERENCES:
patent: 2949772 (1960-08-01), Kritz
patent: 3958559 (1976-05-01), Glenn et al.
patent: 4001766 (1977-01-01), Hurwitz
patent: 4044273 (1977-08-01), Kanda et al.
patent: 4097835 (1978-06-01), Green
patent: 4184094 (1980-01-01), Kopel

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