CONTRAST-ENHANCING AND SIGNAL-INTEGRATING IMAGE-INTENSIFIER STORAGE TUBE. VOLUME I. THEORETICAL CONSIDERATIONS,
Abstract
The INTIC tube is an electronic analogy of a photographic camera that accepts a visual image and presents it immediately as an electronic image. During the writing phase of the operation, the optical image is transformed into an electronic image which is accelerated and forms a charge pattern on the storage grid. In the readout phase, the storage grid is exposed to a uniform stream of electrons which passes through the holes of the storage grid at a rate determined by the charges around each hole. This forms a second electronic image which is a replica of the optical image and which can be maintained over a selected time period. The electrons forming the second electronic image are highly accelerated. When focussed on a suitable phosphor screen, each electron causes the emission of a number of light quanta, which results in a visible image corresponding to the image on the photocathode. The contrast on the phosphor screen may be enhanced considerably by changing the potential on the storage grid electrode. Employing preamplifying stages permits the fundamental limitation of contrast enhancement to be reached, as determined by statistical fluctuations in the electronic image. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1968
- Accession Number
- AD0684712
Entities
People
- Daniel R. Charles
- Georg Wendt