reflected radiation from faraway objects which are of no interest reaches the detector when the detector is deactivated and therefore do not contribute to the intensity detected by the corresponding pixel of the detector a proper choice of the duration b thus can be used to ensure that only reflected radiation from objects within the desired examination range are received during each specific cycle thereby facilitating the interpretation of the intensity image as will readily be appreciated in certain applications different portions of the various objects in the scene may have different reflectivities the different reflectivities result from different colors textures and angles of the various portions of the objects thus two points which are the same distance from the source detector will be detected as having different intensities which could lead to false distance readings which are based on intensities as described above it is possible to readily compensate for differences in reflectivities of different objects or portions of objects being examined as is well known the intensity detected by a pixel of a detector receiving continuous radiation from a specific portion of a scene is directly proportional to the reflectivity of the portion being viewed and inversely proportional to the square of the distance.