TRANSMISSION IMAGING WITH A CODED SOURCE.

W. W. Stoner, J. P. Sage, M. Braun, D. T. Wilson, H. H. Barrett

Research output: Contribution to conferencePaper

Abstract

Spatial modulation of the source distribution provides a way to introduce detailed structure in the transmission images cast by large area sources, and this permits the recovery of high resolution images, in spite of the source diameter. The spatial modulation is deliberately chosen to optimize recovery of image structure; the modulation pattern is therefore called a ″code″ . A variety of codes may be used; the essential mathematical property is that the code possess a sharply peaked autocorrelation function, because this property permits the decoding of the raw image cast by the coded source. This paper is restricted to the case of the Fresnel zone pattern code, which has the unique additional property of generating raw images analogous to Fresnel holograms. Because the spatial frequency of these raw images are extremely coarse compared with actual holograms, a photoreduction step onto a holographic plate is necessary before the decoded image may be displayed with the aid of coherent illumination.

Original languageEnglish (US)
Pages133-136
Number of pages4
StatePublished - Jan 1 2017
EventProc of ERDA Symp on X- and Gamma-Ray Sources and Appl - Ann Arbor, MI, USA
Duration: May 19 1976May 21 1976

Other

OtherProc of ERDA Symp on X- and Gamma-Ray Sources and Appl
CityAnn Arbor, MI, USA
Period5/19/765/21/76

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Stoner, W. W., Sage, J. P., Braun, M., Wilson, D. T., & Barrett, H. H. (2017). TRANSMISSION IMAGING WITH A CODED SOURCE.. 133-136. Paper presented at Proc of ERDA Symp on X- and Gamma-Ray Sources and Appl, Ann Arbor, MI, USA, .