Location

Seattle, WA

Start Date

1-1-1996 12:00 AM

Description

Synthetic aperture focusing techniques (SAFT) represent a special class of beam steering algorithms [1] that are used to improve the resolution and signal-to-noise ratio (SNR) of ultrasonic images. It has been traditionally performed using focused transducers, with the test material located in a region where the ultrasonic beam diverges beyond the focal point [2,3]. This is to ensure that the transducer collects enough data relating to the defect. Operating in the far-field of the transducer where the spatial field variations are slow minimizes the error.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

15B

Chapter

Chapter 8: Systems, New Techniques and Process Control

Section

New Techniques

Pages

2073-2079

DOI

10.1007/978-1-4613-0383-1_272

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Synthetic Aperture Focusing Techniques in the Near Field of a Focused Transducer

Seattle, WA

Synthetic aperture focusing techniques (SAFT) represent a special class of beam steering algorithms [1] that are used to improve the resolution and signal-to-noise ratio (SNR) of ultrasonic images. It has been traditionally performed using focused transducers, with the test material located in a region where the ultrasonic beam diverges beyond the focal point [2,3]. This is to ensure that the transducer collects enough data relating to the defect. Operating in the far-field of the transducer where the spatial field variations are slow minimizes the error.