Optical system for measuring orientation and position without image formation with point source and mask

摘要

The general field of the invention is that of systems for the optical detection of the orientation and the position of a mobile object in space. The system comprises a fixed electro-optical device comprising a transmission point source, image analysis means and an optical cube corner disposed on the mobile object. The input surface of the cube corner comprises a polygonal-shaped mask, the sides of which comprise a geometric marking to identify them. The fixed electro-optical device comprises photosensitive means close to the point source and disposed in two different recording planes and recording two luminous shapes in perspective of the mask obtained by reflection on the surfaces of the cube corner. The image analysis means comprise means for determining the vanishing points of the two luminous shapes in the two recording planes, the knowledge of the four vanishing points enabling the determination of the position and orientation of the optical cube corner in relation to the fixed electro-optical device.

主权项

1. System for detecting the position of a mobile object in space, comprising a fixed electro-optical device of known orientation, comprising at least a first transmission point source, image analysis means and a unit comprising an optical cube corner disposed on the mobile object, wherein:
the input surface of the cube corner comprises a polygonal-shaped mask, each side of the polygon comprising a geometric marking to identify it, the image of the mask obtained by reflection on the surfaces of the cube corner being the intersection of the projection of the mask and the projection of its image by the cube corner in relation to the center of the cube corner; the fixed electro-optical device comprises optical means for implementing a luminous shape in perspective in a first recording plane and a second luminous shape in perspective in a second recording plane optically offset from the first recording plane, photosensitive means being disposed in said recording planes; and the image analysis means comprising means for determining the two first vanishing points of the first luminous shape in the first recording plane and the two second vanishing points of the second luminous shape in the second recording plane, the knowledge of said four vanishing points enabling the position and orientation of the optical cube corner in relation to the fixed electro-optical device to be determined.