Use Of Holographic Optical Elements As Beam Splitters In Holography Of Weakly Moving Objects

E. S. Ebied; D. Courjon; J. Bulabois

doi:10.1117/12.933950

7 July 1983 Use Of Holographic Optical Elements As Beam Splitters In Holography Of Weakly Moving Objects

E. S. Ebied, D. Courjon, J. Bulabois

Proceedings Volume 0353, Industrial and Commercial Applications of Holography; (1983) https://doi.org/10.1117/12.933950
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

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.

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E. S. Ebied, D. Courjon, and J. Bulabois "Use Of Holographic Optical Elements As Beam Splitters In Holography Of Weakly Moving Objects", Proc. SPIE 0353, Industrial and Commercial Applications of Holography, (7 July 1983); https://doi.org/10.1117/12.933950

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KEYWORDS

Holography

Holograms

3D image reconstruction

Image quality

Beam splitters

Image compression

Microscopy

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