Retroreflector with sensor

A reflector arrangement for position determination or marking target points, the reflector arrangement comprising:

• at least one retroreflector, which
• provides position determination for the reflector arrangement by means of parallel measurement beam reflection, and
• provides a passage surface for at least a part of measurement radiation entering the retroreflector, and
• at least one sensor arrangement, arranged downstream of the retroreflector in relation to a measurement beam incidence direction, the sensor arrangement having a sensor for recording measurement radiation passing through the passage surface, the sensor defining an optical axis oriented orthogonally with respect to its detection surface,
• wherein:
• the sensor arrangement includes a code element having a code pattern, and
• the retroreflector, the code element, and the sensor being arranged such that:
• the code element is arranged between the retroreflector and the sensor, and
• an angle-dependent position with respect to the optical axis of a projection of the code pattern onto the detection surface can be determined by means of the sensor,
• wherein the retroreflector is configured as a prism, and the prism comprises:
• a light entry surface forming a triangle and,
• as an aperture, the passage surface opposite the light entry surface,
• wherein the reflector arrangement is configured as a 360° retroreflector having a multiplicity of retroreflector and sensor arrangement pairs, each having a retroreflector and a sensor arrangement as specified above, with
• the multiplicity of retroreflectors being arranged next to one another and being configured as prisms,
• the multiplicity of retroreflectors numerically corresponding to the number of sensor arrangements, and
• each sensor arrangement being assigned to a retroreflector,
• wherein:
• the multiplicity of retroreflector and sensor arrangement pairs are arranged annularly, and
• the 360° retroreflector defines an overall azimuth field of view of 360°, each of the retroreflector and sensor arrangement pairs covering a part of the overall field of view,
• wherein:
• a central axis A defined by the annular arrangement of the prisms extends orthogonally with respect to the optical axes of the sensors, and
• the optical axes of at least two prisms have a common point of intersection with the central axis A, the position of an optical axis of a prism being defined by the respective midpoints of its light entry surface and of its passage surface.