Location

San Diego, CA

Start Date

1-1-1985 12:00 AM

Description

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’.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

4A

Chapter

Chapter 1: Ultrasonics

Section

Imaging and Reconstruction

Pages

297-307

DOI

10.1007/978-1-4615-9421-5_33

Language

en

File Format

Application/pdf

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Jan 1st, 12:00 AM

Reconstruction of Defects by Ultrasonic Testing Using Synthetic Aperture Procedures

San Diego, CA

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’.