DISPOSITIF OPTICOELECTRIQUE POUR REALISER UN ALIGNEMENT PRECIS ET POUR MESURER LA LINEARITE

The invention of an "optoelectric arrangement for precision alignment and straightness measurement" relates to the field of optical straightness and flatness measurement. The aim of the invention is an element for measuring orthogonal displacements with respect to a reference straight line defined by laser beams, which has no electrical connection to the evaluation unit, uses the entire beam power for signal processing, reduces the transirradiated air path to a minimum, and is suitable as a supplementary device for laser distance measurement systems having a parallel measurement and reference beam. The object is preferably achieved by arranging for the optical element geometrically to divide the parallel beams defining the reference normal at its optical edges as a function of position. In the further development of the element, one generated component is offset in parallel per beam and guided to near the corresponding part component of the other beam, as a result of which the summation of the two power components is realised in an optical fashion. The beam components thus assigned are guided in parallel to the end of the processing region where they are focused by means of lenses onto photodetectors, and electronic evaluation is performed in a known way. LE DISPOSITIF COMPORTE UN ELEMENT OPTIQUE 10 DONT LES ARETES DIVISENT GEOMETRIQUEMENT DES RAYONS PARALLELES QUI DEFINISSENT LA NORMALE DE REFERENCE. UN COMPOSANT DE RAYONNEMENT CREE POUR CHAQUE FAISCEAU EST DECALE PARALLELEMENT ET APPROCHE DU COMPOSANT CORRESPONDANT DE L'AUTRE FAISCEAU POUR ADDITIONNER PAR VOIE OPTIQUE LES DEUX COMPOSANTS DE PUISSANCE. LES COMPOSANTS DE RAYONNEMENT ASSOCIES SONT CONDUITS PARALLELEMENT VERS LA FIN DE LA ZONE D'EXECUTION DU PROCEDE OU ILS SONT FOCALISES SUR DES ELEMENTS PHOTOSENSIBLES 3 AU MOYEN DE LENTILLES 2 POUR ETRE TRAITES PAR VOIE ELECTRONIQUE.