Plasma and Fusion Research

Volume 4, S1012 (2009)

Rapid Communications

Compression of Arago Spot Images for Rapid Position Measurement of Inertial Fusion Energy Targets
Hitoshi SAKAUCHI and Ryusuke TSUJI
Graduate School of Science and Engineering, Ibaraki University, Hitachi 316-8511, Japan
(Received 2 December 2008 / Accepted 25 May 2009 / Published 9 September 2009)

Abstract

A target position measurement method using a compressed Arago spot image is presented for real time data processing. To decrease the amount of data of the Arago spot image, the image is optically compressed into a one dimensional line image by a cylindrical lens. The experimental results for a 5 mm diameter target demonstrated a measurement accuracy of 0.35 µm when the target was 10 m from a charge coupled device (CCD) camera.

Keywords

target position measurement, image compression, Arago spot, real-time data processing

DOI: 10.1585/pfr.4.S1012

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References

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This paper should be cited as follows:

Hitoshi SAKAUCHI and Ryusuke TSUJI, Plasma Fusion Res. 4, S1012 (2009).