An electro-optic holography system with real-time arithmetic processing
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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.
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- An electro-optic holography system with real-time arithmetic processing
Journal of Nondestructive Evaluation
Volume 8, Issue 2 , pp 69-76
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers-Plenum Publishers
- Additional Links
- holographic interferometry
- coherent optical methods
- speckle interferometry
- Industry Sectors
- Author Affiliations
- 1. Fiber Optics and Quantum Electronics, MS 92, United Technologies Research Center, 06108, East Hartford, Connecticut
- 2. Recognition Technologies, Inc., 160 East Main Street, 01581, Westborough, Massachusetts