Scanning system and transmitting and receiving device for a scanning system

Abstract

The invention relates to a scanning system (1), having a transmitting path (10), a receiving path (12), a transmitter (11), a receiver (13) and a rotating scanning device (2). The transmitter (11) emits radiation (3), which propagates along an optical axis on the transmitting path (10). The radiation (7) received from the target object (4) is detected by the receiver (13) on the receiving path (12). Furthermore, the rotating scanning device (2) comprises an optical unit (30) and a rotating deflecting unit (33), which deflects the radiation of the transmitting path (10) and of the receiving path (12). The optical unit (30) has a first focusing apparatus (31) and a rotating second focusing apparatus (32). The movements of the rotating deflecting unit (33) and of the rotating second focusingapparatus (32) occur synchronously in order to ensure alignment of the deflected radiation with the second focusing apparatus (32). Furthermore, the first focusing apparatus (31) images the radiation(3) emitted by the transmitter (11) onto the rotating deflecting unit (33) in such a way that the beam diameter at the rotating deflecting unit (33) is reduced. In addition, the rotating deflecting unit (33) deflects the radiation (3) onto the rotating second focusing apparatus (32), and the rotating second focusing apparatus (32) collimates the radiation (3) toward the target object (4). The rotating second focusing apparatus (32) images the radiation (7) received from the target object (4) onto the rotating deflecting unit (33) in such a way that the beam diameter at the rotating deflectingunit (33) is reduced, and the rotating deflecting unit (33) deflects the received radiation (7) to the receiver (13).

Description

technical field [0001] The invention relates to a scanning system comprising transmit and receive paths, a transmitter, a receiver and a rotating scanning device. The invention also relates to a sending device and a receiving device for such a scanning system. Background technique [0002] Scanning systems are known from the prior art which can be used, for example, in automotive lidar systems, building scanning systems or for detecting 3D geometries. The scanning system is based on the fact that a light beam is sent for scanning a target object and the light beam is reflected from the target object back to the receiver. From the signal propagation time and the speed of light, for example, the distance of a target object in the observation range can be ascertained. [0003] Scanning systems can be realized on the basis of various principles and in particular with the aid of movable components. In the embodiment of the scanning system, the distinguishing criterion is wheth...

AI Technical Summary

Problems solved by technology

[0005] If the diameter of the rotating element is chosen too small, this can in some cases result in signal loss and incomplete beam deflection

This will also negatively affect the range of the scanning system

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