| 摘要 |
The present invention relates to a light scanner device ( 10 ) for measuring a range and an angular direction of a target object ( 56 ), the device ( 10 ) comprising a pulsed source ( 12 ) adapted to transmit light pulses, a transmitter deflection means ( 20 ) adapted to reflect and sweep the transmitted light pulses in variable sweep directions across a sweep sector in a sweep plane ( 15 ), a photodetection means ( 42 ) adapted to detect received light pulses that have been reflected in the sweep plane ( 15 ), a receiver deflection means ( 24 ) adapted to reflect light pulses that have been reflected in the sweep plane ( 15 ) and to re-direct the reflected light pulses to the photodetection means ( 42 ). The device comprises optical shielding means ( 32 ) adapted to optically shield transmitted light pulses on their trajectory from the pulse source ( 12 ) to the transmitter deflection means ( 20 ) and at least a portion of their trajectory extending from the transmitter deflection means ( 20 ) into the sweep sector from reflected light pulses on their trajectory between the photodetection means ( 42 ) and the receiver deflection means ( 24 ) and at least a portion of their trajectory extending in the sweep sector and ending on the receiver deflection means ( 24 ).
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