Electro-optical processor for measuring displacement employing the Talbot and the nonsteady-state photo-electromotive force effects

We present a device for measuring displacement based on the Talbot and the nonsteady photo-electromotive force effects. The proposed device does not require any numerical signal processing since its output signal is, in appropriate regions, linearly related to the measured displacement. The proposed...

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Bibliographic Details
Published inOptics letters Vol. 39; no. 1; p. 104
Main Authors Rodriguez-Montero, P, Sánchez-de-la-Llave, D, Mansurova, S
Format Journal Article
LanguageEnglish
Published United States 01.01.2014
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Summary:We present a device for measuring displacement based on the Talbot and the nonsteady photo-electromotive force effects. The proposed device does not require any numerical signal processing since its output signal is, in appropriate regions, linearly related to the measured displacement. The proposed system requires an illuminating field with a sinusoidal amplitude distribution and low fringe visibility. The dynamic range can be adjusted according to the illuminating field spatial period or wavelength. Displacements with an estimated resolution better than 10 μm in a dynamic range of 1.5 mm were detected using a sinusoidal amplitude grating with a period d=100 μm.
ISSN:1539-4794
DOI:10.1364/OL.39.000104