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Optical Engineering

Real-time preprocessing of holographic information
Author(s): Bradley Wade Schilling; Ting-Chung Poon
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Paper Abstract

Optical scanning holography (OSH) is a holographic recording technique that uses active optical heterodyne scanning to generate holographic information pertaining to an object. The holographic information manifests itself as an electrical signal suitable for real-time image reconstruction using a spatial light modulator. The electrical signal that carries the holographic information can also be digitized for computer storage and processing, allowing the image reconstruction to be performed numerically. In previous experiments with this technique, holographic information has been recorded using the interference pattern of a plane wave and a spherical wave of different temporal frequencies to scan an object. However, the proper manipulation of the pupil functions in the recording stage can result in real-time processing of the holographic information of an object during recording. We propose a holographic edge extraction technique as an important example of real-time preprocessing of holographic information that utilizes alternate pupils in the OSH recording stage. We investigate the theory of holographic preprocessing using a spatial frequency-domain analysis based on the recording system's optical transfer function. The theory is reinforced through computer simulation.

Paper Details

Date Published: 1 November 1995
PDF: 7 pages
Opt. Eng. 34(11) doi: 10.1117/12.213592
Published in: Optical Engineering Volume 34, Issue 11
Show Author Affiliations
Bradley Wade Schilling
Ting-Chung Poon, Virginia Polytechnic Institute and State Univ. (United States)

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