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 language | English (US) |
|---|---|
| Pages | 133-136 |
| Number of pages | 4 |
| State | Published - 1976 |
| Event | Proc of ERDA Symp on X- and Gamma-Ray Sources and Appl - Ann Arbor, MI, USA Duration: May 19 1976 → May 21 1976 |
Other
| Other | Proc of ERDA Symp on X- and Gamma-Ray Sources and Appl |
|---|---|
| City | Ann Arbor, MI, USA |
| Period | 5/19/76 → 5/21/76 |
ASJC Scopus subject areas
- Engineering(all)