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Proceedings Paper

Multiplexed lenses written onto a liquid crystal display to increase depth of focus
Author(s): Juan Campos; Octavi López-Coronado; Claudio Iemmi; Juan C. Escalera; Roger Gimeno; María J. Yzuel
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Paper Abstract

In this work we propose different types of combination of several diffractive lenses written onto a single programmable liquid crystal display (LCD) in order to increase the depth of focus (DOF) of the imaging system. Each lens is designed in such a way that lenses with consecutive focal lengths provide amplitude distributions along the axis that overlap. The lenses are spatially multiplexed onto the LCD following different schemes: by sectors, by rings and randomly. We compare experimentally the Point Spread Function (PSF) in transversal planes along the optical axis with a single lens and with the designed multiplexed lenses. The intensity profiles are also compared. The random multiplexing is the combination technique that brings the best results in terms of DOF.

Paper Details

Date Published: 30 August 2006
PDF: 9 pages
Proc. SPIE 6311, Optical Information Systems IV, 63110Q (30 August 2006); doi: 10.1117/12.679095
Show Author Affiliations
Juan Campos, Univ. Autónoma de Barcelona (Spain)
Octavi López-Coronado, Univ. Autónoma de Barcelona (Spain)
Claudio Iemmi, Univ. de Buenos Aires (Argentina)
Juan C. Escalera, Univ. Autónoma de Barcelona (Spain)
Roger Gimeno, Univ. Autónoma de Barcelona (Spain)
María J. Yzuel, Univ. Autónoma de Barcelona (Spain)


Published in SPIE Proceedings Vol. 6311:
Optical Information Systems IV
Bahram Javidi; Demetri Psaltis; H. John Caulfield, Editor(s)

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