7 July 2005 Optoelectronic device for the measurement of the absolute linear position in the micrometric displacement range
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Abstract
In this work, an optoelectronic device that provides the absolute position of a measurement element with respect to a pattern scale upon switch-on is presented. That means that there is not a need to perform any kind of transversal displacement after the startup of the system. The optoelectronic device is based on the process of light propagation passing through a slit. A light source with a definite size guarantees the relation of distances between the different elements that constitute our system and allows getting a particular optical intensity profile that can be measured by an electronic post-processing device providing the absolute location of the system with a resolution of 1 micron. The accuracy of this measuring device is restricted to the same limitations of any incremental position optical encoder.
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Tomas Morlanes, Jose Luis de la Pena, Luis Miguel Sanchez-Brea, Jose Alonso, Daniel Crespo, Jose Bienvenido Saez-Landete, Eusebio Bernabeu, "Optoelectronic device for the measurement of the absolute linear position in the micrometric displacement range", Proc. SPIE 5840, Photonic Materials, Devices, and Applications, (7 July 2005); doi: 10.1117/12.628135; https://doi.org/10.1117/12.628135
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