Construction laser system comprising rotation laser and laser receiver, with functionality for automatic determination of the laser receiver direction

The construction laser system has a rotating laser (10) for the emission of a rotating laser beam (14) such that the rotating laser beam defines a reference surface, where the rotating laser has a laser unit (11) and a continuously rotatable deflector (12). A storage (17) is provided with multiple rotation angle ranges with respect to the rotation of the deflector. A laser receiver (20) is formed for generating the output signal (24) with information related to an impact time point of the laser beam on the laser beam-detector. Independent claims are included for the following: (1) a method for determining laser receiver-direction; and (2) a computer program product with program code.