Article

Optical Imaging of a Complex Ultrasonic Field by Diffraction of a Laser Beam

Lockheed Palo Alto Research Laboratory, Palo Alto, California
Journal of Applied Physics (Impact Factor: 2.21). 04/1967; DOI: 10.1063/1.1709800
Source: IEEE Xplore

ABSTRACT First Page of the Article

0 Bookmarks
 · 
29 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: Acoustic microscopy is emerging as an important analytical technique serving the needs of both biomedical and materials technology. Based upon imaging of specimens with elastic waves at VHF and UHF frequencies, acoustic microscopes reveal structural-mechanical properties with high magnification. A review of the techniques and their applications are presented.
    Proceedings of the IEEE 05/1979; · 6.91 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper briefly reviews the field of Bragg-diffraction imaging starting with the history of the investigation of light-sound interaction which led up to the development of the Bragg-diffraction imaging systems. The operation of two different systems are described along with a discussion of their advantages and disadvantages. A rigorous analysis of the imaging principles is presented. The analysis uses a quantum-mechanical approach to illustrate the basic Bragg condition and frequency shift; wave theory based on Maxwell's equations to describe the three-dimensional light-sound interaction; and, ray theory, based on the Eikonal equations, to determine the actual position of the Bragg images and the aberrations present in the imaging process. The application of Bragg-diffraction imaging to medical diagnosis and nondestructive testing is discussed.
    Proceedings of the IEEE 05/1979; · 6.91 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Recent advances in electronics and digital processing techniques have significantly improved conventional ultrasonic imaging systems and allowed the development of new and sophisticated scanning methods. As a result, ultrasonic imaging devices have become an important modality for the clinical radiologist, complimenting the images obtained from X-ray and nuclear cameras. A particular advantage of ultrasonic waves is that they are nonionizing, thus presenting less risk to both patient and examiner. This paper presents some of the basic principles of ultrasonic propagation in tissue and how those principles impact the design of imaging devices. The characteristics of both the B- scan and C-scan techniques are described along with a summary of various scan formats that are currently available. Examples of B-scan and C-scan instruments are presented along with their relative advantages, limitations, and current usage;representative images are presented whenever possible. This paper concludes with a description of some new research developments in this rapidly emerging technology.
    Proceedings of the IEEE 05/1979; · 6.91 Impact Factor