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Proceedings Paper

Liquid crystal adaptive lens: operation and aberration
Author(s): Patrick F. Brinkley; Stephen T. Kowel
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Paper Abstract

A possible approach to a volume optical memory system is a page addressed or bit plane architecture. Bit planes of data are stored in the memory medium analogous to pages in a book. Each bit plane consists of a matrix of spots like letters on a page. A two-photon memory mechanism is used and the memory medium is assumed to be in the shape of a cube. Orthogonal beams will be used to locate a point within the cube. The memory architecture would consist of an input spatial light modulator, dynamic focus lens system, optical memory medium and detector array. Both read and write operations require that a bit plane of data be imaged to a specific plane within the memory medium. Read out would be accomplished in a similar way using the dynamic lens, second orthogonal beam and a detector array. The dynamic focus lens used here is the liquid crystal adaptive lens (LCAL). The LCAL focuses light by electrically grading the refractive index across its aperture. By changing voltages of the discrete electrodes the focal length is changed, thereby creating a dynamic lens. This presentation will discuss the LCAL's perfomance as applied to a page addressed volume optical memory.

Paper Details

Date Published: 2 February 1993
Proc. SPIE 1773, Photonics for Computers, Neural Networks, and Memories, (2 February 1993); doi: 10.1117/12.983234
Show Author Affiliations
Patrick F. Brinkley, Univ. of California/Davis (United States)
Stephen T. Kowel, Univ. of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 1773:
Photonics for Computers, Neural Networks, and Memories
Stephen T. Kowel; John A. Neff; William J. Miceli, Editor(s)

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