25 April 2014 Beam shaping using liquid crystal-on-silicon spatial light modulators for laser ultrasound generation
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Abstract
The application of laser ultrasound for nondestructive testing of carbon fiber–reinforced plastics (CFRP) and carbon fiber–reinforced thermoplastics (CFRTP) is shown. Laser-generated excitation creates a three-dimensional, thermoelastic zone which emits ultrasound waves during expansion and contraction. In order not to exceed the damage threshold of the material to be tested usually only a low-energy density and therefore a weak excitation of ultrasound waves can be achieved. For instance, the use of a YAG laser type with a wavelength around 1
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Michael K. Kalms, Sandra Hellmers, Philipp Huke, Ralf B. Bergmann, "Beam shaping using liquid crystal-on-silicon spatial light modulators for laser ultrasound generation," Optical Engineering 53(4), 044110 (25 April 2014). https://doi.org/10.1117/1.OE.53.4.044110 . Submission:
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