603410 Disclosed is a device for locating an object (2) in space. The device comprises an array (10) of sensors (3/4, 3a/4a, 3b/4b, 3c/4c). Each sensor (3/4, 3a/4a, 3b/4b, 3c/4c) in the array (10) includes a transmitter (4, 4a, 4b, 4c) and a receiver (3, 3a, 3b, 3c). Each transmitter (4, 4a, 4b, 4c) is capable of transmitting a transmission beam (6) having a spread greater than zero degrees and up to 10 degrees to space. Each receiver (3, 3a, 3b, 3c) is capable of establishing a field of detection (5) in space. The transmitter (4, 4a, 4b, 4c) and receiver (3, 3a, 3b, 3c) of each sensor (3/4, 3a/4a, 3b/4b, 3c/4c) are arranged within the array (10) such that a detection zone (7) in space is generated at the intersection between the transmission beam (6) and the field of detection (5). The detection zone (7) of each sensor (3/4, 3a/4a, 3b/4b, 3c/4c) is generated at a place in space where a reflection of the transmission beam (6) from the object (2) strikes directly the receiver (3, 3a, 3b, 3c). The receiver (3, 3a, 3b, 3c) is capable of generating an output signal in response to the reflected beam from the object (2) within the detection zone (7). The object (2) is located in space when all or substantially all of the receivers (3, 3a, 3b, 3c) in the array (10) generate an output signal substantially simultaneously in response to the object (2) within their respective detection zones (7).
