The present invention describes a system for changing the properties of the lenses to create changes in focus, magnification, and optical stabilization without changing the shape of the lens or moving the lenses. It uses an acoustic wave that when propagated through the lenses, creates a standing wave that changes the diffractive capabilities of the lens. It involves the properties of many materials to change the diffractive properties when subjected to acoustic waves. The acoustic waves are generally accomplished with a piezo electric transducer or modulator. The frequencies used are in the RF range, depending on the substrate. Substrates used include glass and silicon, as well as more esoteric transparent materials. The system described in the present invention involves the development of a lensing mechanism that comprises one or more acoustio-optic modulator(s), a transparent or semi-transparent substrate where the modulation is applied, and a non-parallel standing wave being propagated in the substrate.

A vibration device comprises a vibrating member having at least n (n≥2) piezoelectric elements arranged on a vibrating plate, each of the piezoelectric elements being formed by using a lead-free piezoelectric material and electrodes, wherein if the temperature that maximizes the piezoelectric constant of the piezoelectric material of each of the n piezoelectric elements is expressed as T.sub.m (m being a natural number between 1 and n), at least two of T.sub.1 through T.sub.n differ from each other.

A piezoelectric sensor assembly, a manufacturing method thereof, a display panel and an electronic device including the same are provided. The piezoelectric sensor assembly includes: a base substrate; a plurality of ultrasonic transducers, wherein a spacing area is provided between two adjacent ultrasonic transducers; and an acoustic matching layer, wherein the acoustic matching layer includes a plurality of acoustic matching areas, and an orthographic projection of at least one acoustic matching area on the base substrate falls into an orthographic projection of the ultrasonic transducer corresponding to the acoustic matching area on the base substrate, wherein an isolation cavity is provided between two adjacent acoustic matching areas.

A multi-channel drive system for a piezoelectric actuator having a multiple-frequency resonant mode, the system including multiple signal generators, multiple feedback circuitries, and a processor. The multiple signal generators are configured to generate multiple respective drive signals at multiple respective drive signal frequencies, and to drive the piezoelectric actuator with the multiple drive signals. The multiple feedback circuitries are configured to measure multiple respective feedback signals at the multiple drive signal frequencies. The processor is configured to adaptively maintain the piezoelectric actuator vibrating in the multiple-frequency resonant mode, by adjusting the drive signal frequencies in response to the respective measured feedback signals.

A thermoacoustic transducer integrating at least one piezoelectric element having a first surface and a second surface, a potential electrode that is electrically connected to the second surface, a ground electrode that is electrically connected to the first surface, a switch electrically connected to both the potential electrode and the ground electrode, a timer configured to match a pulse emanating from a radio-frequency emitter, further wherein the potential electrode and the ground electrode are electrically connected through an impedance when the switch is in an active state, further wherein the potential electrode and the ground electrode are not electrically connected when the switch is in an inactive state; and a housing accommodating the at least one piezoelectric element, potential electrode, ground electrode, and switch.

An ultrasonic vibration application tool equipped with a Langevin type ultrasonic vibrator which is suitably employable for ultrasonic processing devices and which efficiently generates ultrasonic vibration includes: a cylindrical housing having a contact face on a lower or bottom part of an inner surface thereof, and a lower screw part of an outer surface thereof; a bolted Langevin type ultrasonic vibrator comprising a front mass, a rear mass and a polarized piezoelectric element arranged between both masses, in which the front mass comprises a cylindrical tool-holder and a disc-shaped bulging part provided with a contact face for fitting to the contact face of the housing; and a ring-shaped counterweight having an upper screw part on an inner peripheral surface which is screwed with the screw part of the housing.

A method for generating a mechanical wave, including generating a high amplitude mechanical pulse; coupling the mechanical pulse in a proximal end of a transmission member; propagating the mechanical pulse into the transmission member from the proximal end and a distal end thereof; and transmitting the mechanical pulse at the distal end.

An intraluminal imaging device includes a flexible elongate member sized and shaped for insertion into a vessel of a patient, the flexible elongate member including a proximal portion and a distal portion; an imaging assembly positioned at the distal portion of the flexible elongate member; and a bridge member at electrical ground and in contact with at least a portion of the imaging assembly to maintain the at least portion of the imaging assembly at electrical ground, wherein the bridge member is disposed in cylindrical configuration. Associated devices, systems, and methods are also provided.

The present disclosure provides an acoustic wave transducer and a driving method thereof, The acoustic wave transducer includes cell groups, at least part of which each include acoustic wave transducer cells configured to perform a same operation, each acoustic wave transducer cell being configured to perform at least one of: converting an acoustic wave signal into an electrical signal and converting an electrical signal into an acoustic wave signal; and array element signal terminals, each of which is coupled to at least two adjacent cell groups, and is coupled to different cell groups through different switch devices, each switch device being configured to control connection and disconnection between the array element signal terminal and the cell group coupled to the switch device, and the cell groups coupled to an array element signal terminal and the cell groups coupled to an adjacent array element signal terminal are partly the same.

A method for generating a mechanical wave, including generating a high amplitude mechanical pulse; coupling the mechanical pulse in a proximal end of a transmission member; propagating the mechanical pulse into the transmission member from the proximal end and a distal end thereof; and transmitting the mechanical pulse at the distal end.