Fabrication of optical microlenses by a new inkjet printing technique based on pyro-electrohydrodynamic (PEHD) effect

S. Coppola; V. Vespini; I. A. Grimaldi; F. Loffredo; F. Villani; L. Miccio; S. Grilli; P. Ferraro

doi:10.1117/12.922624

8 May 2012 Fabrication of optical microlenses by a new inkjet printing technique based on pyro-electrohydrodynamic (PEHD) effect

S. Coppola, V. Vespini, I. A. Grimaldi, F. Loffredo, F. Villani, L. Miccio, S. Grilli, P. Ferraro

Author Affiliations +

Proceedings Volume 8428, Micro-Optics 2012; 84280O (2012) https://doi.org/10.1117/12.922624
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

Here the pyroelectric functionality of a Lithium Niobate (LN) substrate is used for non-contact manipulation of liquids. In this work we introduced the use of a pyro-electrohydrodynamc (PEHD) dispenser for the manipulation of high viscous polymer materials leading to the fabrication of arrays of microlenses. The set-up used for the experiment is described and the fabricated microlenses are analyzed by means of the Digital Holography (DH) set-up in transmission mode and through profilometric analysis. PMMA based ink was employed for the realization of optical quality microsctructures whose geometrical properties and, hence, the focal lengths were controlled by modifying the printing configuration of the PEHD method. The profilometric results are in agreement with those calculated using the digital holography technique.

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S. Coppola, V. Vespini, I. A. Grimaldi, F. Loffredo, F. Villani, L. Miccio, S. Grilli, and P. Ferraro "Fabrication of optical microlenses by a new inkjet printing technique based on pyro-electrohydrodynamic (PEHD) effect", Proc. SPIE 8428, Micro-Optics 2012, 84280O (8 May 2012); https://doi.org/10.1117/12.922624

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KEYWORDS

Microlens

Polymers

Printing

Liquids

Inkjet technology

Bridges

Microlens array

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