Abstract: An optical element (100) suitable for guiding infrared radiation onto an infrared sensor (210) for detecting movements has a first region (110), in which a plurality of first lenses (112) having an aperture from a first aperture range and a focal length from a first focal length range are arranged, and has a second region (120), which lies within the first region (110) and has at least one second lens (122) having an aperture from a second aperture range having values which are greater than the values of the first aperture range, and/or having a focal length from a second focal length range having values which are greater than the values of the first focal length range.

Abstract: The invention relates to a method and a system for regulating the brightness of target zone lighting means that illuminate an interior target zone of an interior. The method comprises the following steps: optically mapping at least part of the interior to an interior image by means of spatially resolved brightness sensor means; determining a present brightness value vector, the components ?i(t) of which correspond to present integrated brightness values of an i-th interior image zone; determining a target zone brightness control value from the scalar product of the present brightness value vector and a target zone calibration vector associated with an interior target zone; and regulating the target zone brightness control value to a target zone brightness setpoint value by adapting the illumination intensity of the target zone lighting means.

Abstract: The invention relates to a hot-air fan including a fan device for generating an air flow, a heating device for heating the air flow, and a control unit connected to the fan device and to the heating device. In this process, the control unit is designed to control the fan device in such a manner that, when the heating device is switched on, the fan device generates a starting air flow that is reduced to an operating air flow. The invention also relates to a method for operating the hot-air fan, including the steps of switching on the heating device and generating a starting air flow that is reduced to an operating air flow.

Abstract: The invention relates to a method and a system for regulating the brightness of target zone lighting means that illuminate an interior target zone of an interior. The method comprises the following steps: optically mapping at least part of the interior to an interior image by means of spatially resolved brightness sensor means; determining a present brightness value vector, the components ?i(t) of which correspond to present integrated brightness values of an i-th interior image zone; determining a target zone brightness control value from the scalar product of the present brightness value vector and a target zone calibration vector associated with an interior target zone; and regulating the target zone brightness control value to a target zone brightness setpoint value by adapting the illumination intensity of the target zone lighting means.

Abstract: A portable control apparatus (100) for controlling a motion sensor (200), comprising communication means (110), display means (120) and input means (130). The communication means (110) allow wireless communication with a motion sensor (200) and are suitable for receiving a detection signal, currently generated in the motion sensor (200), from the motion sensor (200) while the control apparatus (100) is in a detection region (210) of the motion sensor (200). The display means (120) allow this detection signal to be displayed. The input means (130) allow the adjustment of a detection threshold at which a movement is detected by the motion sensor (200), on the basis of the displayed detection signal. The adjusted detection threshold is transferred to the motion sensor (200) by the communication means (110) and set there as the applicable detection threshold.

Abstract: A heating element (18) for a heating element carrier (10) of an electrically operated heat gun (100). The heating element carrier (10) is designed to receive the heating elements (18). The heating elements comprise a resistance wire (34) with a cross-sectional surface A and a cross-sectional perimeter U, where (4?A)U2<1.

Abstract: The invention relates to an electrical, pistol-like handheld tool. The handheld tool includes a tool body for electrically activated machining of a workpiece, a grip part connected to the tool body at an angle thereto, an actuation device for manually activating and/or deactivating the handheld tool, which actuation device is arranged on the tool body or the grip part, and an unlocking device for manually unlocking and/or locking the actuation device. The unlocking device is arranged on the tool body or the grip part such that unlocking is effected by the handheld tool being supported in stable equilibrium on one of the fingers of a user's hand when the grip part is gripped by a user.

Abstract: The invention relates to a hot-air fan including a fan device for generating an air flow, a heating device for heating the air flow, and a control unit connected to the fan device and to the heating device. In this process, the control unit is designed to control the fan device in such a manner that, when the heating device is switched on, the fan device generates a starting air flow that is reduced to an operating air flow. The invention also relates to a method for operating the hot-air fan, including the steps of switching on the heating device and generating a starting air flow that is reduced to an operating air flow.

Abstract: An ultrasonic doppler motion sensor device includes a transmitter (10, 12) for emitting a continuous ultrasonic transmission signal in a detection space, an ultrasonic receiver (20, 22) for detecting the ultrasonic transmission signal reflected by the detection object as a receive signal, and a mixer and detector (14, 18) for mixing the ultrasonic transmission signal or a signal derived therefrom with the receive signal and/or for demodulating the receive signal and for generating a motion detection signal therefrom, wherein the mixer and detector are assigned a system (14) for the adjustable generation of a phase shift greater than 0° between a phase of the ultrasonic transmission signal and a periodic impulse signal at the mixer or detector for scanning and mixing the receive signal.