Abstract: A coupling device for transferring a medium from a stationary part to a rotating part, including a stationary first ring, which is fixed in place on a stationary part, a second, rotatable ring, which is fixed in place on a rotatable part and rotates along with the rotatable part, a bearing, which is situated between the first ring and the second ring, an annular gap, which is situated between the first ring and the second ring, a supply line, which is disposed at the first ring for the supply of the medium, a discharge line, which is situated at the second ring for the conveying of the medium, the discharge line rotating along with the second ring, an inner sealing element, which seals the annular gap at a radially inner side, and an outer sealing element, which seals the annular gap at a radially outer side.

Abstract: A coupling device for transferring a medium from a stationary part to a rotating part, including a stationary first ring, which is fixed in place on a stationary part, a second, rotatable ring, which is fixed in place on a rotatable part and rotates along with the rotatable part, a bearing, which is situated between the first ring and the second ring, an annular gap, which is situated between the first ring and the second ring, a supply line, which is disposed at the first ring for the supply of the medium, a discharge line, which is situated at the second ring for the conveying of the medium, the discharge line rotating along with the second ring, an inner sealing element, which seals the annular gap at a radially inner side, and an outer sealing element, which seals the annular gap at a radially outer side.

Abstract: A device for measuring the shape of freeform surfaces of objects includes a point-measuring optical and or interferometric scanning arm which is displaceable along a predefined path line, which device generates a measurement beam focused on the freeform surface to be measured. With reference to the scanning point, the scanning arm is able to rotate in at least one plane, in such a way that the measuring beam impinges upon the freeform surface to be measured in a perpendicular manner or within an acceptance angle of the scanning arm.

Abstract: A device for coupling beam guides of optical systems for unidirectional or bidirectional transmission of beams via a beam transition between the optical systems is provided, the device having a connecting device and mechanical centering means. The connecting device provides a magnetic coupling for implementing a coupling connection in a coupling area. The centering means are situated opposite one another on the optical systems and coupled in such a way to cause the beam guides to self-center due to the attraction caused by the magnetic forces.

Abstract: A device for coupling beam guides of optical systems for unidirectional or bidirectional transmission of beams via a beam transition between the optical systems is provided, the device having a connecting device and mechanical centering means. The connecting device provides a magnetic coupling for implementing a coupling connection in a coupling area. The centering means are situated opposite one another on the optical systems and coupled in such a way to cause the beam guides to self-center due to the attraction caused by the magnetic forces.