Abstract
The three methods ALOK (Amplitude Time Locus Curves), PHASED ARRAY and LSAFT (Line-Synthetic-Aperture-Focussing-Technique) use the method of synthesizing a large aperture by moving a probe. The result is a high lateral resolution and the capability to focus into the farfield of the probe. As pointed out in Fig.1, a focal probe focusses only in one depth within the near field length. The PHASED ARRAY probe allows to change this focal distance within the near field length electronically. The SAFT-method allows to focus in all depths simultaneously within the near field length which is given not by the probe diameter D but by the synthetic aperture D’.
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© 1985 Plenum Press, New York
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Schmitz, V., Höller, P. (1985). Reconstruction of Defects by Ultrasonic Testing Using Synthetic Aperture Procedures. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9421-5_33
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DOI: https://doi.org/10.1007/978-1-4615-9421-5_33
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