| 摘要 |
The scanner has a transmission arrangement with a laser and a lens, a light deflector and a receiver arrangement with a lens and optoelectronic photoreceiver. Light from the transmission arrangement passes via the deflector and a front screen to a measurement region. Light reflected by an object passes back to the deflector and to the receiver arrangement. An adjustment device enables variable setting of the size of a received light core shadow. The scanner has a transmission arrangement (16) with a laser (12) and a lens (14), a light deflector (18) and a receiver arrangement (24) containing a reception lens and an optoelectronic photoreceiver. Light from the transmission arrangement passes at various angles via the deflector and a front screen (40) to a measurement region (44). Light reflected by an object passes back to the deflector in the manner of an auto-collimation beam path and then to the receiver arrangement. Received light is at least partly shaded in a core region (50). An adjustment device (64) enables variable setting of the size of the received light core shadow. |
