Patent ID: 8711369

Claim:
A laser receiver for detecting a relative position of a defined zero point of said laser receiver with respect to an external reference laser beam not from the laser receiver, the laser receiver comprising: a laser light photo sensor having a plurality of photo sensitive elements providing an electrical output when illuminated by said external reference laser beam; circuitry connected to said photo sensor for determination of said relative position; a visible readout for indication of said relative position, wherein the visible readout includes a first laser fan emitter including a laser light source; and at least one fan-generating optical element for projecting a visible laser line onto a target surface, wherein the visible laser line is from a substantially flat planar fan-shaped laser beam emitted from the first laser fan emitter; and a housing, wherein at least said housing, said laser light photo sensor, said circuitry, said visible readout and said first laser fan emitter are assembled as unitary apparatus.