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Proceedings Paper

Noise And Image Degrading Effects In Image Intensification
Author(s): Herbert K. Pollehn
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Paper Abstract

Over the past years image intensification has come into widespread use to increase detection and recognition capabilities for objects of, or in, radiation of low intensity. The type of radiation, for which image intensification can be used, ranges from x-rays into the near infrared region. The principle of operation is explained through Figure 1. (See also Reference 1.) Radiation from the scene is imaged onto the first stage, where a percentage of the radiation is converted into electrons, forming an electron image. For x-ray intensifiers this stage consists of a phosphor screen and a cathode, whereas for other types of radiation only a cathode is needed. By the intensifier stage, the electron image is transferred to the output, where the electrons--in most cases--are used to generate radiation in a suitable wavelength region and of sufficient intensity. Sufficient intensity is obtained through a gain mechanism.

Paper Details

Date Published: 1 June 1972
PDF: 8 pages
Proc. SPIE 0035, Application of Optical Instrumentation in Medicine I, (1 June 1972); doi: 10.1117/12.953660
Show Author Affiliations
Herbert K. Pollehn, Night Vision Laboratory (United States)

Published in SPIE Proceedings Vol. 0035:
Application of Optical Instrumentation in Medicine I
Paul L. Carson; William R. Hendee; William C. Zarnstorff, Editor(s)

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