| 摘要 |
The invention relates to a laser receiver (1) for detecting a relative position of a defined zero point (22) of said laser receiver (1) with respect to a reference laser beam (11) - in particular a reference laser beam of a rotating construction laser (20). Therefore, the laser receiver (1) comprises a laser light photo sensor (2) having a plurality of photo sensitive elements (3) providing an electrical output when illuminated by said reference laser beam (11), a circuitry (4) connected to said photo sensor (2) for determination of said relative position and a visible readout (5) for indication of said relative position, in particular for indicating if said zero point (22) is on-grade with respect to said reference laser beam (11). According to the invention, at least a first laser fan emitter (6) - with a laser light source (8) and at least one fan-generating optical element (9) - is provided for projecting a visible laser line (10) onto a target surface, particularly in order to re-project a sharp marking-line through the vertical center of the reference laser beam (11). |
