[Table of Contents]

Plasma and Fusion Research

Volume 2, S1123 (2007)

Regular Articles

Tomographic Reconstruction of Uniformly Redundant Penumbral Array Camera
Shinya NOZAKI, Kentaro NOGUCHI and Yen W. CHEN1)
Okinawa National College of Technology, Nago, Okinawa 905-2192 Japan
1)
Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
(Received 4 December 2006 / Accepted 17 June 2007 / Published 20 November 2007)

Abstract

Penumbral imaging is a powerful imaging technique for radiations with long mean-free path. Since the reconstruction is based on deconvolution, the technique is sensitive to noise contained in penumbral images. Uniformly redundant penumbral array (URPA) technique can improve the SN ratio of penumbral images. In URPA, the penumbral apertures are arranged in m-sequence. In the reconstruction process from the coded data, penumbral image is obtained by correlation to decoding operator. The reconstructed image can be obtained by use of the Wiener filter. In this article, the three-dimensional reconstruction of the URPA and its tomographic resolution are stated.

Keywords

penumbral imaging, coded aperture imaging, m-sequence, uniformly redundant penumbral array (URPA), tomographic resolution

DOI: 10.1585/pfr.2.S1123

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This paper may be cited as follows:

Shinya NOZAKI, Kentaro NOGUCHI and Yen W. CHEN, Plasma Fusion Res. 2, S1123 (2007).