Time of flight camera unit and optical surveillance system

摘要

A time of flight, TOF, camera unit for an optical surveillance system and an optical surveillance system comprising such a TOF camera is disclosed. The TOF camera unit comprises a radiation emitting unit for illuminating a surveillance area defined by a first plane, a radiation detecting unit for receiving radiation reflected from said surveillance area and for generating a three-dimensional image from said detected radiation, and at least one mirror for at least partly deflecting said emitted radiation into at least one second plane extending across to said first plane and for deflecting the radiation reflected from said second plane to the radiation detecting unit. The TOF camera and the at least one mirror may be arranged on a common carrier element.

主权项

1. A time of flight (TOF) camera unit for an optical surveillance system, said TOF camera unit comprising:
a radiation emitting unit for emitting a modulated light along a first optical path and along a second optical path in tandem, wherein the first optical path intersects a first plane of a surveillance area and the second optical path intersects a second plane of the surveillance area; a radiation detecting unit for receiving the modulated light reflected from each of the first plane and the second plane of the surveillance area; and at least one mirror for deflecting the modulated light emitted along the second optical path onto said second plane and for deflecting the modulated light reflected from said second plane back to the radiation detecting unit, wherein the radiation detecting unit is configured to detect a phase shift in the modulated light reflected from each of the first plane and the second plane and to generate a three-dimensional image based on the phase shift detected in the modulated light from the first and second optical paths.