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Review of Progress in Quantitative Nondestructive Evaluation
The transducer-lens system is one major component in the performance of an acoustic microscope. The design criteria for the various types of applications of an acoustic microscope are different. For surface imaging applications, it is desired to have a small spot size and low sidelobe level. For materials characterization and subsurface imaging applications (sue~ as subsurface crack imaging), it is required to have high surface wave excitation efficiency. Several researchers addressed thedoi:10.1007/978-1-4613-1893-4_76 fatcat:j5olbfs3uvcudasfwqk6g3u3sm