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Proceedings Paper

Feedback-generated holograms and their tolerance to aberration
Author(s): Edward G. S. Paige; Ranulf Howell Scarbrough
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Paper Abstract

We report on the generation of optical holograms by electronic feedback between intensity detectors in the output plane of the system and an electronically variable hologram. The holographic component is a spatial light modulator (SLM) acting in binary, phase-only, mode. Feedback is via a computer which determines pixel states using an iterative optimization algorithm. The results show optimal (correct to a single pixel) and near optimal SLM pixel patterns and near diffraction limited output. Similar performance is achieved when a strong phase aberrator is introduced into the system demonstrating the tolerance of the feedback generated holograms to aberration and providing a new means of determining phase aberration. Breaking of inversion symmetry as a consequence of introducing the aberrator is demonstrated. Results will be presented showing the effect of combining the feedback determined aberration correction with computer generated holograms.

Paper Details

Date Published: 5 August 1994
PDF: 4 pages
Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); doi: 10.1117/12.182063
Show Author Affiliations
Edward G. S. Paige, Univ. of Oxford (United Kingdom)
Ranulf Howell Scarbrough, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 2321:
Second International Conference on Optoelectronic Science and Engineering '94
Wang Da-Heng; Anna Consortini; James B. Breckinridge, Editor(s)

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