Scanning apparatus

Scanning device for a Optical scanning system consisting of a housing (1), the device-fixed Laser source (12), an oscillating mirror (3) for deflecting the laser beams (4) and receiving means (17) for reflected laser radiation (4 ') comprises further from an evaluation device (31) from the Duration of the laser radiation distance values ​​determined that the respective deflection angles are associated with a further window (2) from a for the laser radiation transparent material that the casing (1) closes and through which the transmit laser beams (4) in the object space exit and the object space reflected beams (4 ') preferably through said window (2) to enter into the device, wherein the window (2) spherical is formed and the center of curvature with the intersection of the two axes of rotation (A1, A2) of the oscillating mirror (3) coincides and correction means (21) in the beam path of the laser beams (4, 4 ') are provided, which the optical effect of the curved window compensate (2).