OPTICAL COMPONENTS FOR OPTICALLY SCANNING THE SURFACE OF AN OBJECT WHOSE SURFACE IS CAPABLE OF REFLECTING, SCATTERING OR REFRACTING LIGHT

摘要

Optical components for scanning the surface of an object (15, 28) have a first reflecting body (9, 20, 51) provided with an opening (10, 21, 52) through which an object (15, 28) is moved while being exposed to the light from a light source by means of the reflecting body. The reflecting body has a ring-shaped reflecting surface (11, 31) that deflects the light (16, 16', 29, 29') onto the object around its circumference and vice-versa radially to the main axis (14, 22) of the reflecting or refracting body. A second optical body (1, 19, 50) with planar reflecting surfaces (2, 2', 5', 6', 7', 8', 23, 23', 24, 24', 25, 25') located in the direction of the main axis of the first reflecting body also has an opening (4, 21, 52) through which the object can be moved located above the opening of the first reflecting body, as well as an opto-electronic sensor (13, 27) and an electrical evaluating device. Two reflecting surfaces of the second body (1, 19, 50, 54) are designed as wedge-shaped surfaces (2, 2', 23, 23') inclined towards each other and opto-symmetrically arranged with respect to the reflecting surface (11, 31, 57) of the first body (9, 20, 51). The opening (4, 21, 52, 55) in the second body symmetrically crosses both wedge-shaped surfaces, so that the bundle or rays is decomposed into two partial bundles of rays (16, 16', 29, 29') that fall each on one of the wedge-shaped surfaces, opposite to which are arranged further reflecting or refracting surfaces (5', 6', 7', 8', 24, 24', 25, 25'), so that the partial bundles of rays are separately deflected by the wedge-shaped surfaces onto the reflecting or refracting surfaces, are reflected back onto the same wedge-shaped surfaces in the area of the half (61') of the second body opposite the opening, then are reunited into a single bundle of rays by the wedge-shaped surfaces.