Multi-element, capacitive, ultrasonic, air-coupled transducer
OwnerChristine BIATEAU, Michel CASTAINGS +1inventors
InventorsChristine BIATEAU, Michel CASTAINGS, Mathieu RENIER
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Abstract
A multi-element, capacitive, ultrasonic, air-coupled transducer includes a membrane having an electrically conductive face; and a plurality of electrically separate conductive elements, consisting of a central disc and a plurality of rings arranged concentrically with the central disc, the conductive elements each having a face arranged facing the membrane and the faces of the conductive elements being of the same surface area; wherein the central disc has a radius of between 10 mm and 15 mm and wherein the number of conductive elements is between 12 and 18.
Claims5
A multi-element capacitive ultrasonic air-coupled transducer comprising:
- a membrane having an electrically conductive face;
- and
- a plurality of electrically independent conductive elements, consisting of a central disc and a plurality of rings arranged concentrically with the central disc, the conductive elements each having a face arranged facing the membrane and said faces of the conductive elements being of the same surface area;
- wherein the central disc has a radius between 10 mm and 15 mm and wherein the number of the conductive elements is between 12 and 18.
Dependencies are inferred from the claim text.