R. G. Simpson, H. H. Barrett, J. G. Kelly, K. T. Stalker

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations


One-dimensional coded apertures have been investigated for use in imaging long, narrow objects such as reactor fuel pins. Since coded apertures work better for small, point-like objects, while pinhole apertures work better for large extended objects, a hybrid aperture combining these properties seems attractive for imaging fuel pins. The one-dimensional aperture behaves like a coded aperture in the direction for which the object is small, while it acts like a pinhole in the direction for which the object is extended. A one-dimensional Fresnel zone plate has been investigated, and an iterative nonlinear algorithm has been developed for removing the background produced by extra-core values in the point spread function. The algorithm is shown to have a decidedly nonlinear effect on the effective system transfer function.

Original languageEnglish (US)
Number of pages8
StatePublished - Jan 1 1977
Externally publishedYes
EventUnknown conference - Reston, VA, USA
Duration: Apr 18 1977Apr 21 1977


OtherUnknown conference
CityReston, VA, USA

ASJC Scopus subject areas

  • Engineering(all)

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