Temperature compensated piezoelectric transducer and lens assemb

Details Temperature compensated piezoelectric transducer and lens assemb Temperature compensated piezoelectric transducer and lens assemb

1983-03-08

1985-11-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, 29 2535, H01L 4108, H04R 1700

Patent

active

045516472

ABSTRACT:
An ultrasonic transducer for use in a high temperature environment and method for fabricating the same. A disk-shaped piezoelectric crystal is weakened in at least one surface in accordance with a predetermined line pattern relative to a first direction in that surface. The crystal is bonded to a thin lens material with a coefficient of thermal expansion dissimilar in this first direction. The predetermined line pattern is adapted to relieve stress in this first direction created by unequal rates of expansion or contraction of the crystal and the lens.

REFERENCES:
patent: 3387604 (1968-06-01), Erikson
patent: 3546012 (1970-12-01), Dixon et al.
patent: 3973152 (1976-08-01), Karplus
patent: 4184094 (1980-01-01), Kopel
patent: 4217516 (1980-08-01), Iinuma et al.
patent: 4384231 (1983-05-01), Ishikawa et al.
patent: 4385255 (1983-05-01), Yamaguchi et al.

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