Real-time Frequency-translated Holographic Visualization of SAW Interactions with Surface-breaking Defects
A real-time, frequency-translated holographic imaging system has been developed by use of bacteriorhodopsin film. The system provides a capability for imaging surface acoustic waves and has been utilized to detect and characterize surface-breaking defects through near-field ultrasonic scattering effects. Frequency-plane filtering was used to discriminate between ultrasonic standing-wave and near-field scattering features, dramatically enhancing the holographic visualization of the defect sites. A detailed description of the system is presented, along with representative holographic images showing the interaction of surface acoustic waves with surface-breaking cracks and small notches in aluminum and titanium substrates.
Copyright © 2002, Optical Society of America
Optical Society of America
Blackshire, James L.; Sathish, Shamachary; Duncan, Bradley D.; and Millard, Mike, "Real-time Frequency-translated Holographic Visualization of SAW Interactions with Surface-breaking Defects" (2002). Electro-Optics and Photonics Faculty Publications. 19.