Presenter Information

Ken Lakin

Location

La Jolla, CA

Start Date

1980 12:00 AM

Description

This report describes an imaging system employing the digital reconstruction of the near fields of an object using the amplitude and phase of the scattered fields measured on a remote plane in the Fresnel zone. This imaging technique is shown to be significantly different from holographic and phased array systems and basically computationally implements a classical lens system having the reconstruction plane parallel or perpendicular to the measurement plane. The theory of the imaging approach is detailed and the method of obtaining a real-time implementation is described. Test data for the first 64x64 element array using PVDF elements and electronic scanning is presented.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

8. Visualization Procedures

Pages

272-279

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Wavefront Reconstruction Acoustic Imaging Using Two-Dimensional Arrays

La Jolla, CA

This report describes an imaging system employing the digital reconstruction of the near fields of an object using the amplitude and phase of the scattered fields measured on a remote plane in the Fresnel zone. This imaging technique is shown to be significantly different from holographic and phased array systems and basically computationally implements a classical lens system having the reconstruction plane parallel or perpendicular to the measurement plane. The theory of the imaging approach is detailed and the method of obtaining a real-time implementation is described. Test data for the first 64x64 element array using PVDF elements and electronic scanning is presented.