Patent ID: 7589826

Claim:
A laser scanner operating on the basis of the elapsed light transmission time principle comprising a pulsed laser ( 13 ) adapted to direct successive light pulses ( 10 ) into a monitored region, a light receiving arrangement ( 17 ) for receiving light pulses ( 10 ) reflected by an object ( 12 ) in the monitored region and directing corresponding received electric signals to an evaluation unit ( 16 ) which generates a distance signal reflecting a time difference between an emission and a receipt of the lightpulse ( 10 ) and the speed of light and which is representative of a distance between the laser scanner ( 1 ) and the object, a light diverting unit ( 5 ) arranged between the pulsed laser ( 13 ) and the monitored region which continuously changes a direction of the light pulses ( 10 ) directed into the monitored region, a light source emitting light measuring signals ( 9 ) of a reduced strength arranged so that the light diverting unit ( 5 ) also continuously changes a direction of the light measuring signals directed into the monitored region, the light receiving arrangement ( 17 ) being positioned to receive light measuring signals ( 9 ) reflected by the object in the monitored region and configured to generate a reflection signal that is representative of the reflection of the light measuring signals ( 9 ) by the object, and wherein the light pulses ( 10 ) or the received electric signals are variable in dependency of the reflection signal.