Patent ID: 7434322
Filing Date: 2008-10-14
Classification: A63C,G01C,Y10S

Abstract:
1. Reference beam generator, for guiding a field marker movable relative to the reference beam generator and intended for producing ground markings, comprising: a positionable and fixable support element defined relative to the Earth's surface, the support element having a geometry with two limbs arranged at right angles; a source of electromagnetic radiation; beam guidance means for emitting a first and second fan-like emission of the radiation and for defining a first emission direction and orientation of the beam cross-section, the beam guidance means being configured to adjust and fix the first emission direction and orientation for achieving a defined alignment to at least one reference target, and the beam guidance means defining a second emission direction with a predefined angle relative to the first emission direction or being configured to adjust and fix the second emission direction and orientation for achieving a defined alignment to a second reference target, wherein components of the beam guidance means are arranged so as to be longitudinally displaceable relative to the limbs; and an optical detection component for detecting the radiation reflected by the at least one reference target and displaying said radiation in a manner visible to the human eye.