Abstract
Cheap optical transducers (CHOTs) are patterns on the surface of a component activated by lasers to generate and detect ultrasound. Excited optically, with minimal surface impact, and fully customizable, CHOTs provide a simple alternative to conventional piezoelectric transducers, offering wireless, remote operation. Of particular interest is application of CHOTs for in-situ ultrasonic inspection of hard-to reach and complex-geometry components such as those of aero-engines. A suitable fabrication method has been developed to allow in-situ application of CHOTs onto large size and curved components, as well as those already in service, challenging for current laboratory-based micro-patterning methods. This work describes the fabrication of a transferable g-CHOT for generation of ultrasound. The g- CHOT has been made on an SU8 carrier film using a sacrificial polystyrene layer, allowing the transducer to be transferred from the substrate and subsequently delivered and applied to the surface of the sample in-situ. The functionality of the fabricated transducer is demonstrated by detection of the Surface Acoustic Waves (SAW) generated by the g-CHOT transferred onto glass and aluminium samples.
Original language | English |
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Article number | 012010 |
Journal | Journal of Physics: Conference Series |
Volume | 581 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2015 |
Externally published | Yes |
Event | 13th Anglo-French Physical Acoustics Conference, AFPAC 2014 - Selsdon Park Hotel, Croydon, United Kingdom Duration: 15 Jan 2014 → 17 Jan 2014 |
ASJC Scopus subject areas
- General Physics and Astronomy