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Proceedings Paper

Use Of Holographic Optical Elements As Beam Splitters In Holography Of Weakly Moving Objects
Author(s): E. S. Ebied; D. Courjon; J. Bulabois
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Paper Abstract

The necessity of perfect stability of the object during the holographic recording step is one of the chief problems which limits the use and the development of such an optical coding technique. In this communication, it is shown that the quality of the reconstructed image depends upon several parameters, first of all the object motion, the structure of the object, the type of recording set-up, the nature of the coding and finally the linearity of the transfer intensity → density in the hologram. Taking into account such different parameters, it is then possible to design holographic set-ups characterized by a relative insensitivity to motion and more generally to perturbations of the object during the recording step. The adopted device is based on imagery which ensures optical paths of equal lengths and on the use of holographic optical elements as beamsplitters. Thanks to holographic beamsplitters it is possible to modify the distribution of the object information in the hologram plane. Two holographic codings are studied : i) a small hologram area codes one object point (point to point coding), ii) a small hologram area codes the whole object information (object to point coding). Although the second coding gives a better result than the first in the case of a fixed object, the first one enables us to retrieve images of good quality even for object displacements of a few millimeters. The developed technique should be carried out in holographic microscopy of living cells.

Paper Details

Date Published: 7 July 1983
PDF: 9 pages
Proc. SPIE 0353, Industrial and Commercial Applications of Holography, (7 July 1983);
Show Author Affiliations
E. S. Ebied, Faculte des Sciences et des Techniques (France)
D. Courjon, Faculte des Sciences et des Techniques (France)
J. Bulabois, Faculte des Sciences et des Techniques (France)

Published in SPIE Proceedings Vol. 0353:
Industrial and Commercial Applications of Holography
Milton Chang, Editor(s)

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