Device and method for detecting presence of an object

Research output: Patent

Abstract

The present invention relates to a method (60) and device (2, 40, 50) for detecting presence of an object (52) by means of influencing propagation of light (16) arriving to a detector (14). The device (2, 40, 50) for detecting presence of the object (52) at the device (2, 40, 50) comprises a light source (4), a first redirecting structure (6), a second redirecting structure (10), and a light detector device (14). The light source (4) is adapted to emit light (16) towards the first redirecting structure (6), which is adapted to redirect light (16) from the light source (4) towards the second redirecting structure (10), which is adapted to return light (16) from the first redirecting structure (6) back towards the first redirecting structure (6), which is adapted to redirect light (16) from the second redirecting structure (10) towards the light detector device (14). The device (2, 40, 50) has a sensing zone (18) formed by light (16) propagating between the first redirecting structure (6) and the second redirecting structure (10).
Original languageEnglish
IPCEP2521929
Filing date14/11/2012
Publication statusPublished - 2012

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