Multiplexed lenses written onto a liquid crystal display to increase depth of focus

Juan Campos; Octavi López-Coronado; Claudio Iemmi; Juan C. Escalera; Roger Gimeno; María J. Yzuel

doi:10.1117/12.679095

30 August 2006 Multiplexed lenses written onto a liquid crystal display to increase depth of focus

Juan Campos, Octavi López-Coronado, Claudio Iemmi, Juan C. Escalera, Roger Gimeno, María J. Yzuel

Author Affiliations +

Proceedings Volume 6311, Optical Information Systems IV; 63110Q (2006) https://doi.org/10.1117/12.679095
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Juan Campos, Octavi López-Coronado, Claudio Iemmi, Juan C. Escalera, Roger Gimeno, and María J. Yzuel "Multiplexed lenses written onto a liquid crystal display to increase depth of focus", Proc. SPIE 6311, Optical Information Systems IV, 63110Q (30 August 2006); https://doi.org/10.1117/12.679095

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