Optical system for measuring orientation with cubic wedge and mask

摘要

The field of the invention is that of optical systems for detecting the posture of a mobile object in space. The system comprises an electro-optical fixed device of known orientation comprising a first point emission source, a telecentric emission/reception optic and a photosensitive matrix sensor. An assembly comprising an optical cubic wedge is disposed on the mobile object. The input face of the cubic wedge comprises a mask in the shape of a parallelogram, each side of the parallelogram comprising a geometric marking making it possible to identify it, the image of the mask projected on the photosensitive matrix sensor, by reflection on the faces of the cubic wedge, being the intersection of the projection of the mask and of the projection of its image inverted with respect to the centeR of the cubic wedge. Analysis of this image makes it possible to determine the orientation of the cubic wedge.

主权项

1. A system for detecting posture of a mobile object in space comprising:
an electro-optical fixed device of known orientation comprising at least one first point emission source and a photosensitive matrix sensor; and an assembly comprising an optical cubic wedge disposed on the mobile object, wherein:
the electro-optical fixed device comprises a telecentric optic comprising a projection objective, a reception objective and a semi-reflecting optical element which are arranged in such a way that the at least one first point emission source is disposed at a focus of the projection objective by reflection or by transmission through the semi-reflecting optical element and that an image of the at least one first point emission source is disposed at a focus of the reception objective by transmission or by reflection through the semi-reflecting optical element;an input face of the optical cubic wedge comprises a mask in a shape of a parallelogram, each side of the parallelogram comprising a geometric marking making it possible to identify each side, an image of the mask on the photosensitive matrix sensor, by reflection on the input face of the optical cubic wedge, being an intersection of a projection of the mask and of a projection of it's the image of the mask by the optical cubic wedge with respect to a centre of the optical cubic wedge.