Patent ID: 7251086

Claim:
An apparatus for positioning an optical element in a structure, the optical element being connected to the structure via fastening elements, and it being possible to set the position of the optical element by means of adjusting fasteners, wherein said fastening elements are arranged in such a way and said adjusting fasteners can be adjusted in such a way that the optical element can be rotationally moved through three mutually independent axes and can additionally be moved laterally in one axial direction: a) said fastening elements blocking the movement along one axis, and all the axes of the movements blocked by said fastening elements lie in a plane that is defined by the tilt axes along which the optical element cannot be moved laterally, b) the axes of the movements blocked by said fastening elements lying perpendicular to the axial direction in which the optical element can be moved laterally, and c) the axes of the movements being blocked by said fastening elements intersect one another at a point on an axis along which the optical element can be moved laterally.