In embodiments a sensor includes a carrier material and an insulation layer.

An optical element drive mechanism is provided. The optical element drive mechanism includes an immovable part, a first movable part, and a first drive assembly. The first movable part is connected to a first optical element. The first movable part is movable relative to the immovable part. The first drive assembly drives the first movable part to move relative to the immovable part. The optical element drive mechanism is polygonal, including a first side, a second side, a third side, and a fourth side. The first side is opposite and parallel with the third side. The second side is opposite and parallel with the fourth side. The first drive assembly is disposed on the first side.

A driving mechanism is provided. The driving mechanism includes a fixed portion, a movable portion, a driving assembly, a circuit assembly, and a signal adjusting assembly. The movable portion is movable relative to the fixed portion. The driving assembly is used for driving the movable portion to move relative to the fixed portion. The driving assembly is used for receiving a first signal provided by a control assembly. The driving assembly is electrically connected to the control assembly by the circuit assembly. The signal adjusting assembly is electrically connected to the driving assembly. The signal adjusting assembly is used for adjusting the first signal.

A detecting device includes a plurality of ultrasonic transducers that transmit and receive ultrasonic waves. The detecting device includes a laminate, and a frame layer stacked on at least one face of a first face of the laminate and a second face opposite the first face. The laminate includes a flexible substrate, a circuit layer including a plurality of first electrodes and at least one second electrode, the circuit layer being stacked on the flexible substrate, and a piezoelectric layer stacked on the circuit layer. One of the ultrasonic transducers includes at least one of the first electrodes that is in contact with the piezoelectric layer, and at least one of the second electrodes that is in contact with the piezoelectric layer, and the frame layer has a cavity at a position that overlaps the first electrode in plan view.

An optical system is provided. The optical system includes a first optical module, a fixed portion, and a driving module. The first optical module is used for connecting to a first optical element. The first optical module is movable relative to the fixed portion. The driving module is used for driving the first optical module to move relative to the fixed portion. The fixed portion includes an opening corresponding to the first optical module.

An optical element driving mechanism is provided, including a first movable part, a second movable part, and a third movable part. The first movable part is connected to a first optical element. The second movable part is connected to a second optical element that has an optical axis. The third movable part is connected to a third optical element. The first optical element, the second optical element, and the third optical element are arranged along the optical axis. The second optical element is located between the first optical element and the third optical element when viewed along a direction that is perpendicular to the optical axis.

A device for generating a haptic signal. The device includes a haptic module for generating a vibration, a base plate and a cover plate arranged parallel to each other. The cover plate has an abutment surface facing towards the base plate and a top side facing away from the base plate. The haptic module is arranged between the base cover plates, a first partial area of the haptic module abuts the abutment surface of the cover plate and a second partial area of the haptic module abuts the base plate. A spring-loaded suspension mechanically connects the base plate and the cover plate. The spring-loaded suspension is designed so that the abutment surface of the cover plate is moved towards the base plate when the cover plate is in a neutral position and a force is exerted in the direction of the base plate on any point on the top side of the cover plate.

An optical element drive mechanism is provided. The optical element drive mechanism includes an immovable part, a first movable part, and a first drive assembly. The first movable part is connected to a first optical element. The first movable part is movable relative to the immovable part. The first drive assembly drives the first movable part to move relative to the immovable part. The optical element drive mechanism is polygonal, including a first side, a second side, a third side, and a fourth side. The first side is opposite and parallel with the third side. The second side is opposite and parallel with the fourth side. The first drive assembly is disposed on the first side.

A method for the quality inspection of an ultrasonic transducer and an ultrasonic sensor comprising an ultrasonic transducer and carrying out the quality inspection method are described. The ultrasonic transducer comprises a housing having an electrically conductive layer extending at least over an inner surface of a housing wall of the housing, and a piezoelectric transducer arranged in the housing, the end face of which equipped with an electrode is connected to the electrically conductive layer by means of a dielectric coupling layer. According to the method, at least one quality inspection of the ultrasonic transducer is carried out, in which a capacitance of a capacitor comprising the electrode, the electrically conductive layer serving as the counter electrode, and the dielectric coupling layer as a dielectric is measured and a quality defect of the ultrasonic transducer is determined if the measured capacitance is outside a specified capacitance range.

An additively manufactured multilayered structure including a first ceramic layer, the first ceramic layer including a ceramic powder having piezoelectric characteristics and a second ceramic layer built over the first ceramic layer, the second ceramic layer includes a second layer of ceramic powder has piezoelectric characteristics built on the first layer. At least a portion of the second ceramic layer is sintered and set over the first layer.