Device for measuring the relative position of two objects moving in relation to each other
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United States of America Patent
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Oct 27, 2015
Grant Date -
Apr 3, 2014
app pub date -
Aug 30, 2013
filing date -
Sep 28, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a device for measuring the relative position of two objects moving relative to each other along an axis or around a rotating axis (D), with a transmitter (12) which emits unpolarized light, and with a polarizer (20), and with at least one receiver (16) which measures the luminosity of the light passing through the polarizer (20) in order to create a position-dependent signal, such that a polarizing filter is positioned in front of the receiver (16), and the receiver (16) and the polarizer (20) move relative to each other as a function of the relative position of the two objects, and such that the polarizer (20) has at least two different polarizing directions.
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