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    Highly-sensitive Displacement-measuring Optical Device

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    7440117.pdf (916.8Kb)
    Date
    10/21/2008
    Author
    Degertekin, Fahrettin Levent
    Hall, Neal Allen
    Lee, Wook
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    Abstract
    Micron-scale displacement measurement devices having enhanced performance characteristics are disclosed. One embodiment of a micron-scale displacement measurement device includes a phase-sensitive reflective diffraction grating for reflecting a first portion of an incident light and transmitting a second portion of the incident light such that the second portion of the incident light is diffracted. The device further includes a mechanical structure having a first region and a second region, the mechanical structure positioned a distance d above the diffraction grating, the second portion of the incident light is reflected off of the first region of the structure such that an interference pattern is formed by the reflected first portion and the reflected second portion of the incident light. The device can further include an electrode extending toward, but spaced a distance away from, the second region of the mechanical structure.
    URI
    http://hdl.handle.net/1853/57760
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