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Proceedings Paper

Recovery of images from two-color pupil-plane speckle data using object-plane root matching and pupil-plane error minimization
Author(s): Richard B. Holmes; Brett A. Spivey; Adlai H. Smith
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Paper Abstract

Coherent light of one color will form laser speckle upon reflection from a rough object. This laser speckle provides information about the shape of an object. Further information can be obtained if two colors are used, and if the colors are sufficiently close in wavelength that the interference is also measurable. The two speckle patterns and the interference can be shown to provide the minimum information sufficient to form a band-limited image of the object using a root-matching technique described herein. This root-matching technique is performed in the far-field or object plane. This technique is relatively slow and sensitive to noise, and so is supplemented with a technique that minimizes error in the pupil plane. A hybrid technique that combines the two approaches is shown to reproduce images effectively with reasonable computation time.

Paper Details

Date Published: 30 September 1999
PDF: 20 pages
Proc. SPIE 3815, Digital Image Recovery and Synthesis IV, (30 September 1999); doi: 10.1117/12.364141
Show Author Affiliations
Richard B. Holmes, Nutronics, Inc. (United States)
Brett A. Spivey, Thermo Trex Corp. and Litel Instruments, Inc. (United States)
Adlai H. Smith, Litel Instruments, Inc. (United States)


Published in SPIE Proceedings Vol. 3815:
Digital Image Recovery and Synthesis IV
Timothy J. Schulz; Paul S. Idell, Editor(s)

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