Multiplexed interferometer for ultrasonic imaging applications

Todd W. Murray; Sridhar Krishnaswamy

doi:10.1117/1.1385171

1 July 2001 Multiplexed interferometer for ultrasonic imaging applications

Todd W. Murray, Sridhar Krishnaswamy

Optical Engineering, Vol. 40, Issue 7, (July 2001). https://doi.org/10.1117/1.1385171

A multiplexed laser interferometer is presented that allows for the simultaneous detection of acoustic waves from a number of points on the surface of a specimen. Phase gratings are used to create an array of laser beams that are directed to the specimen. The beams are collected using a lens system, combined with a single reference beam in a photorefractive crystal, and imaged on separate photodetector elements. Detection of surface acoustic waves scattered from a defect in an aluminum specimen is demonstrated using a nine-element receiver. Focusing of the array interferometer, by applying appropriate phase shifts between the detected signals, is also shown. The wide bandwidth and noncontact nature of this receiver make it well suited for phased array detection and ultrasonic imaging applications.

©(2001) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Todd W. Murray and Sridhar Krishnaswamy "Multiplexed interferometer for ultrasonic imaging applications," Optical Engineering 40(7), (1 July 2001). https://doi.org/10.1117/1.1385171

Published: 1 July 2001

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available