Fresnel phase plates as reconfigurable microfluidic lenses

Author(s)
Tsikata, Sedina, 1981-
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Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Advisor
Todd Thorsen.
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Abstract
In this study, Fresnel phase plates were tested as reconfigurable lenses. The lenses were constructed from a Fresnel pattern which was transferred to a silicon substrate via photolithography. A layer of PDMS was spin-coated on the substrate and cured to produce the lens. This lens was attached to a PDMS control layer which enabled specific regions of the lens to addressed, via the application of pressure. It was concluded that based on the limitations of the pressure-based Fresnel lenses, liquid-filled flow channels, while possessing slower response times, might be a more promising means of modulating phase.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.
 
Includes bibliographical references (leaf 49).
 
Date issued
2004
URI
http://hdl.handle.net/1721.1/32792
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Publisher
Massachusetts Institute of Technology
Keywords
Mechanical Engineering.
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