Laser scanning and sensing device for detection around automatic doors
First Claim
1. A light scanner device (10) for measuring a range and an angular direction of a target object (56), the device (10) comprising:
- a pulse source (12) adapted to transmit light pulses, a transmitter deflection means (20) adapted to sweep the transmitted light pulses in variable sweep directions across a sweep sector, a photodetection means (42) adapted to detect received light pulses that have been reflected in the sweep sector, a receiver deflection means (24) adapted to re-direct light pulses that have been reflected in the sweep plane (15) to the photodetection means (42), further comprising 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), wherein the transmitter deflection means (20) and the receiver deflection means (24) both comprise a multi-facet mirror comprising a plurality of at least one facet that is/are substantially parallel to each other, and wherein the multi-facet mirror of the transmitter deflection means (20) and the multi-facet mirror of the receiver deflection means (24) are adapted to be rotated in synchronism with each other on a common rotation axis (38), wherein the multi-facet mirror of the transmitter deflection means (20) and the multi-facet mirror of the receiver deflection means (24) form a split multi-facet mirror comprising a groove adapted to optically separate the multi-facet mirror of the transmitter deflection means (20) and the multi-facet mirror of the receiver deflection means (24).
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Accused Products
Abstract
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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Citations
30 Claims
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1. A light scanner device (10) for measuring a range and an angular direction of a target object (56), the device (10) comprising:
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a pulse source (12) adapted to transmit light pulses, a transmitter deflection means (20) adapted to sweep the transmitted light pulses in variable sweep directions across a sweep sector, a photodetection means (42) adapted to detect received light pulses that have been reflected in the sweep sector, a receiver deflection means (24) adapted to re-direct light pulses that have been reflected in the sweep plane (15) to the photodetection means (42), further comprising 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), wherein the transmitter deflection means (20) and the receiver deflection means (24) both comprise a multi-facet mirror comprising a plurality of at least one facet that is/are substantially parallel to each other, and wherein the multi-facet mirror of the transmitter deflection means (20) and the multi-facet mirror of the receiver deflection means (24) are adapted to be rotated in synchronism with each other on a common rotation axis (38), wherein the multi-facet mirror of the transmitter deflection means (20) and the multi-facet mirror of the receiver deflection means (24) form a split multi-facet mirror comprising a groove adapted to optically separate the multi-facet mirror of the transmitter deflection means (20) and the multi-facet mirror of the receiver deflection means (24). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30)
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28. Usage of a light scanner device (10) in a door sensor system (90) for detecting a target object (56) in and/or near a door comprising a door opening (96), and at least one movable door element (76;
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76-1, 76-2, 76-3, 76-4), the device (10) comprising;
a pulse source (12) adapted to transmit light pulses, a transmitter deflection means (20) adapted to sweep the transmitted light pulses in variable sweep directions across a sweep sector, a photodetection means (42) adapted to detect received light pulses that have been reflected in the sweep sector, a receiver deflection means (24) adapted to re-direct light pulses that have been reflected in the sweep plane (15) to the photodetection means (42), wherein the device (10) is arranged such that the scanned area (59) is in a vertical or nearly vertical direction.
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76-1, 76-2, 76-3, 76-4), the device (10) comprising;
Specification