Vorrichtung zur zweidimensionalen Abtastung einer Oberflaeche mit einem Lichtstrahl

The description refers to a device for the two-dimensional scanning of a surface by means of a light beam and a mirror (4) rotatable about two axes perpendicular to each other. One axis is an optical axis (A-A) along which a light beam emitted by a light source runs. The rotating movements of the mirror (4) are caused by two drive motors (1, 2), whereby the rotating movement of the mirror is transferred onto the optical axis (A-A) perpendicular to the standing axis (B-B) via a differential gear (5). The differential gear (5) has two intermeshing gear wheels (10, 11). The mirror (4) is arranged in a mirror holder (3) connected to a hollow shaft rotatable about the axis (B-B). One gear wheel (11) of the differential gear (5) is attached to the mirror (4) and the other gear wheel (10) is connected to the drive shaft (12) of the second drive motor (11). The gear wheel (10) intermeshes with the gear wheel (11) arranged on the mirror.