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US 7,443,555 B2Granted
Laser scanner
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsAndreas Blug, Claudia Baulig
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AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsAndreas Blug, Claudia Baulig
Estimating the term…
A laser scanner is provided with a transmission optic (20) whose laser pencil beam (18) is oriented coaxially with the axis of rotation (28) of a deflecting mirror (22, 24) and coaxially with the optical axis of the associated detector optic (58). The arrangement is such that light reflected by a distant measuring point (44) can be deflected by the deflecting mirror (22, 24) through the detector optic (58) to a signal detector. The output signal (70) of the signal detector can be evaluated to acquire data, particularly spatial coordinates. The transmission optic (20) is disposed in a shading cylinder (22) that is open to the deflecting mirror (24) and extends from the detector optic (58) coaxially with the axis of rotation (28) of the deflecting mirror (22, 24) into the vicinity of the deflecting mirror (22, 24), in order thereby to shade the detector object particularly against stray light that occurs when the laser pencil beam (18) impinges on the deflecting mirror (22, 24, 26).
A laser scanner comprising a transmission optic (20) whose laser pencil beam (18) is oriented coaxially with an axis of rotation (28) of a rotating deflecting mirror (22, 24) and coaxially with an optical axis of an associated detector optic (58) such that the light reflected by a distant measuring point (44) can be deflected by said deflecting mirror (22, 24) and through said detector optic (58) to a signal detector (68) whose output signal (70) can be evaluated for purposes of data acquisition, characterized in that said transmission optic (20) is disposed in a shading cylinder (62) that is open to said deflecting mirror (24) and that extends from the region of said detector optic (58) coaxially with the axis of rotation (28) of said deflecting mirror (22, 24) into the vicinity of said deflecting mirror (22, 24).
Dependencies are inferred from the claim text.