Abstract: A brushless electric motor which has a rotor magnet, a coil apparatus for electromagnetically driving the rotor magnet, a rotor shaft for transmitting a rotary movement, which is firmly connected to the rotor magnet and runs through a rotation axis of the rotor magnet, and at least one electromagnetic transducer element for detection of the magnetic field of the rotor magnet, in which the at least one electromagnetic transducer element is arranged outside the axial extent of the rotor magnet with respect to the rotation axis, and is arranged essentially within the maximum radial extent of the rotor magnet. The invention also relates to an instrument for a medical, in particular a dental, apparatus having a brushless electric motor such as this.

Abstract: The invention relates to a brushless electric motor which has a rotor magnet, a coil apparatus for electromagnetically driving the rotor magnet, a rotor shaft for transmitting a rotary movement, which is firmly connected to the rotor magnet and runs through a rotation axis of the rotor magnet, and at least one electromagnetic transducer element for detection of the magnetic field of the rotor magnet, in which the at least one electromagnetic transducer element is arranged outside the axial extent of the rotor magnet with respect to the rotation axis, and is arranged essentially within the maximum radial extent of the rotor magnet. The invention also relates to an instrument for a medical, in particular a dental, apparatus having a brushless electric motor such as this.

Abstract: The present invention relates to a laser processing apparatus for plasma-induced ablation having a laser light source for generating a processing laser beam, a focussing means for focussing the processing laser beam and an optical detection device for detecting the plasma radiation generated during an ablation, in which case the laser processing apparatus comprises an evaluation and/or control unit, the optical detection device being designed in such a way that it can output to the evaluation and/or control unit a signal dependent on the intensity of the detected plasma radiation, and the laser processing apparatus is designed in such a way that it can automatically be switched from a processing mode into a quiescent mode and/or from the quiescent mode into the processing mode, in a manner dependent on said signal.

Abstract: The present invention relates to a laser processing apparatus for plasma-induced ablation having a laser light source for generating a processing laser beam, a focussing means for focussing the processing laser beam and an optical detection device for detecting the plasma radiation generated during an ablation, in which case the laser processing apparatus comprises an evaluation and/or control unit, the optical detection device being designed in such a way that it can output to the evaluation and/or control unit a signal dependent on the intensity of the detected plasma radiation, and the laser processing apparatus is designed in such a way that it can automatically be switched from a processing mode into a quiescent mode and/or from the quiescent mode into the processing mode, in a manner dependent on said signal.