Some applications of one-dimensional coded apertures

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The 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. Uniformly redundant sequences have also been investigated as possible aperture codes. They can produce filled apertures and result in a decoded image with a uniform background level that can be easily removed by subtraction.

Original languageEnglish (US)
Pages (from-to)71-78
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume106
DOIs
StatePublished - Aug 29 1977

Fingerprint

apertures
Imaging techniques
Optical transfer function
Transfer functions
Imaging
pinholes
Nonlinear Effects
Subtraction
Transfer Function
Reactor
Direction compound
Object
nuclear fuels
point spread functions
subtraction
transfer functions
Background

ASJC Scopus subject areas

  • Applied Mathematics
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Computer Science Applications

Cite this

Some applications of one-dimensional coded apertures. / Simpson, R. G.; Barrett, Harrison H; Kelly, J. G.; Stalker, K. T.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 106, 29.08.1977, p. 71-78.

Research output: Contribution to journalArticle

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