Ultrasonic transducer
US10743757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2018 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Mar 12, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic transducer includes a piezoelectric element in round shape, an acoustic lens, and an acoustic matching layer. The piezoelectric element generates an ultrasonic sound wave. The acoustic matching layer decreases a reflection of the ultrasonic sound wave from a subject. The piezoelectric element has a center having a hole through which an optical fiber that guides a light of a light source passes. The ultrasonic transducer transmits and receives the ultrasonic sound wave while emitting the light. The acoustic lens has a material using a resin with a withstand voltage, mainly polymethylpentene. The acoustic matching layer has a thickness set to λ/4 by not applying a polyparaxylylene coating for ensuring the withstand voltage on the acoustic matching layer. The optical fiber has a distal end configured not to pass through the acoustic lens. The piezoelectric element and the acoustic matching layer have shapes in a planar surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.