Journal of Nondestructive Evaluation

, Volume 8, Issue 2, pp 69–76

An electro-optic holography system with real-time arithmetic processing

  • K. A. Stetson
  • W. R. Brohinsky
  • Jawed Wahid
  • Thomas Bushman
Article

DOI: 10.1007/BF00565632

Cite this article as:
Stetson, K.A., Brohinsky, W.R., Wahid, J. et al. J Nondestruct Eval (1989) 8: 69. doi:10.1007/BF00565632

Abstract

This paper reports the use of a real-time arithmetic image processor in an electro-optic holography system. A speckle interferometer is used to combine an image of an object, lit by laser light, with a mutually coherent reference beam. A CCD TV camera detects the interference pattern, and the phase of the reference beam is advanced by 90° between frames. An image is generated from each set of four sequential TV frames by subtracting alternate frames, squaring, and adding the two results. The result is improved picture quality compared with the use of binary pixels and compared with electronic speckle pattern interferometry. Experimental results are shown.

Key words

holography holographic interferometry ESPI coherent optical methods speckle interferometry 

Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • K. A. Stetson
    • 1
  • W. R. Brohinsky
    • 1
  • Jawed Wahid
    • 2
  • Thomas Bushman
    • 2
  1. 1.Fiber Optics and Quantum Electronics, MS 92United Technologies Research CenterEast Hartford
  2. 2.Recognition Technologies, Inc.Westborough

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