Steerable ultrasonic source using low-power laser sources and fiber optic delivery

Colin I. Swift; S. Gareth Pierce; Brian Culshaw

doi:10.1117/12.436575

16 August 2001 Steerable ultrasonic source using low-power laser sources and fiber optic delivery

Colin I. Swift, S. Gareth Pierce, Brian Culshaw

Proceedings Volume 4327, Smart Structures and Materials 2001: Smart Structures and Integrated Systems; (2001) https://doi.org/10.1117/12.436575
Event: SPIE's 8th Annual International Symposium on Smart Structures and Materials, 2001, Newport Beach, CA, United States

Abstract

Low power laser diode sources were used in conjunction with electronically controllable time delays and fiber optic delivery arranges as a phased array to produce an electronically steerable ultrasonic source. Delays between the array elements of up to 520nS allowed steering of the fundamental longitudinal mode to be achieved at angles of up to 18 degree(s), whilst low pulse powers of 3.6(mu) J ensured that the testing mechanism was non-destructive. Beamsteering has been demonstrated for aluminium plates demonstrating great potential as a tool for structural assessment.

Citation Download Citation

Colin I. Swift, S. Gareth Pierce, and Brian Culshaw "Steerable ultrasonic source using low-power laser sources and fiber optic delivery", Proc. SPIE 4327, Smart Structures and Materials 2001: Smart Structures and Integrated Systems, (16 August 2001); https://doi.org/10.1117/12.436575

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