Machine Holography.
Abstract
This is the final report of a theoretical and experimental investigation into some properties of holograms. Optical holograms suffer from the existence of complex conjugate terms and nonlinearities which add an unavoidable amount of clutter. Because we were able to perform our experiments using a digital computer (Data General Eclipse), these conjugate terms and nonlinearities were not present. This provided a certain cleanness in the mathematics which will be evident. It also showed that the essential properties of the hologram are not restricted to a wave propagation environment. Thus, we have chosen to provide the general name of Machine Holography for our investigation. The name implies that the principles investigated here may be embodied by diverse types of machinery, not just laser based optical systems. The investigation was divided into two packages. The first explored the ultimate storage capacity of what we have come to call Conventionally Multiplexed Holograms. These are holograms which are multiplexed by a summation process whereby each reference pattern participating is uncorrelated with the other references in the ensemble. The primary goal of the second package of work was to demonstrate that a hologram could be trained to reliably distinguish between two highly correlated (reference) patterns. In an effort to design a training paradigm to demonstrate this prediction, a new kind of machine was discovered. This new machine put a negative feedback loop around the hologram. The hologram then became part of a servo mechanism in which both the controller of the servo and the object of control was the stored hologram.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 30, 1979
- Accession Number
- ADA068638
Entities
People
- Chester L. Richards