Determination of the speed of ultrasound in thin materials by observation in reflection or transmission

U. Amjad; E. T. Ahmed Mohamed; Amro Abdelrahman; W. Grill

doi:10.1117/12.847702

8 April 2010 Determination of the speed of ultrasound in thin materials by observation in reflection or transmission

U. Amjad, E. T. Ahmed Mohamed, Amro Abdelrahman, W. Grill

Proceedings Volume 7650, Health Monitoring of Structural and Biological Systems 2010; 765028 (2010) https://doi.org/10.1117/12.847702
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

With the aid of phase contrast acoustic microscopy, the material properties related to mechanics including the speed of ultrasonic waves can be determined. For this purpose the observed variation of the magnitude and phase with the variations in the thickness of the sample in transmission is complemented by modeling in reflection. The later relates to the observation of interference. In the application presented here involving acoustical waves, also time resolved generation and detection is employed to suppress interferences for sufficiently extended objects. This allows the determination of the desired mechanical properties by first arrival techniques. Both methods, interference and first arrival, are presented and discussed. Applications involve also observations on microscopic scales with a lateral resolution of 1 μm. Some of the principles involved for modeling at the resolution limits are exemplified here also on larger scales to demonstrate the reliability of the developed schemes.

Citation Download Citation

U. Amjad, E. T. Ahmed Mohamed, Amro Abdelrahman, and W. Grill "Determination of the speed of ultrasound in thin materials by observation in reflection or transmission", Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 765028 (8 April 2010); https://doi.org/10.1117/12.847702

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