Location

La Jolla, CA

Start Date

1-1-1991 12:00 AM

Description

Previous studies [1] described a sample scanning heterodyne interferometer which produced contour plots of parameters derived from ultrasonic time domain waveform measurements. Subsequent studies [2] described an alternative design that produced similar contour plots by scanning the image of a stationary sample. This enhancement eliminated the need to continuously realign the system, and increased resolution by providing a stable sample plane. This paper describes a further enhanced system that uses a large aperture, long distance microscope to produce a magnified image with higher resolution than previously obtainable. This image scanning micro-interferometer has been developed for imaging small static and dynamic displacements with high resolution and is particularly useful for studying interfaces in fiber reinforced composites.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

10B

Chapter

Chapter 8: Instruments and Systems

Pages

2069-2075

DOI

10.1007/978-1-4615-3742-7_121

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Scanning Heterodyne Micro-Interferometer for High Resolution Contour Mapping

La Jolla, CA

Previous studies [1] described a sample scanning heterodyne interferometer which produced contour plots of parameters derived from ultrasonic time domain waveform measurements. Subsequent studies [2] described an alternative design that produced similar contour plots by scanning the image of a stationary sample. This enhancement eliminated the need to continuously realign the system, and increased resolution by providing a stable sample plane. This paper describes a further enhanced system that uses a large aperture, long distance microscope to produce a magnified image with higher resolution than previously obtainable. This image scanning micro-interferometer has been developed for imaging small static and dynamic displacements with high resolution and is particularly useful for studying interfaces in fiber reinforced composites.