Laser scanner

Details Laser scanner Laser scanner

2006-09-06

2008-10-28

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

C356S004010

Reexamination Certificate

active

07443555

ABSTRACT:
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).

REFERENCES:
patent: 7030968 (2006-04-01), D'Aligny et al.
patent: 2004/0222366 (2004-11-01), Frick
patent: 10216405 (2003-10-01), None

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