THE RELATIVE IMPORTANCE OF PHASE AND AMPLITUDE IN ACOUSTICAL HOLOGRAPHY.
Abstract
The paper contains a description of experiments in which conventional holograms are compared with 'phase only' holograms, in which the object wave amplitude was normalized to a constant quantity. These experiments revealed that there is no significant difference between the quality of the reconstructed images from the two types of holograms. To explain these results, mathematical consideration is given to the question of the relative importance of phase alone versus phase plus amplitude. It is shown that the amplitude term in the hologram plane acts only on the overall amplitude of the object points and not on their relative amplitudes. The same result is seen from a qualitative physical argument. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0674762
Entities
People
- A. F. Metherell
Organizations
- Douglas