Aspects determine horizontal viewing angles for viewers of a display screen as a function of outer edge visual boundary lines projecting from outer edges of the display screen to different respective viewing locations of the viewers. The aspects determine locations of intersections of outer edge visual boundary lines defining the horizontal viewing angle of a first viewer with the outer edge visual boundary lines defining the horizontal viewing angles of the other viewers, and thereby a masking screen width dimension and spatial location for the first viewer as extending from an intersection location determined on one of the outer edge visual boundary lines defining the first viewer's viewing angle that is closest to the first viewer, to a point on another outer edge visual boundary line defining the first viewer's viewing angle that is outside of the viewing angles of the other viewers.

An ultrasonic holography imaging system and method are provided. The ultrasonic holography imaging system includes an ultrasonic transducer array coupled to an analog processing section. The analog processing section is coupled to a digital processing section. The digital processing section generates digital signals to be converted by the analog processing section into analog signals that are transmitted to individual transceiver elements within the ultrasonic transducer array to cause separate ones of the individual transceiver elements to emit ultrasonic waveforms that are differentiated from each other by one or more parameters, including amplitude, frequency, and phase or modulation thereof.

The invention relates to a method for producing a lens for an ultrasound apparatus, as well as to an apparatus comprising the lens. The method comprises choosing a source point, providing a treatment volume situated inside a bone tissue model, providing a plurality of nodes distributed inside the treatment volume, and simulating the emission of a spherical wave from each of the nodes. Thus, a simulated wave front is created, in which each spherical wave has an amplitude and a phase, there being at least two nodes with different amplitudes and/or phases. The simulated wave front is received on a receiving surface. On the basis of the processed results, a holographic lens surface is designed, which can generate a wave pattern equivalent to the simulated wave.

An ultrasonic apparatus (100) for creating a holographic ultrasound field (1) comprises an ultrasound source device (10) being adapted for creating an ultrasound wave, and a transmission hologram device (20) having a transmission hologram (21) and an exposed acoustic emitter surface (22), said transmission hologram device (20) being acoustically coupled with the ultrasound source device (10) and being arranged for transmitting the ultrasound wave through the acoustic emitter surface (22) and creating the holographic ultrasound field in a surrounding space, wherein the acoustic emitter surface (22) is a smooth surface which do not influence the field distribution of the ultrasound wave. Furthermore, a method of creating a holographic ultrasound field in an object (3), wherein the ultrasonic apparatus (100) is used, and applications of the ultrasonic apparatus (100) are described.

A method of non-destructive testing includes providing a non-destructive tester (NDT), including a first processor and a probe/sensor, and smart glasses including a second processor. During movement of the probe/sensor and a specimen under test (SUT) relative to each other, the probe/sensor outputs an interrogation signal into the SUT and acquires a response of the SUT to the interrogation signal. Data corresponding to the response of the SUT is wirelessly communicated from the first processor to the second processor where the data is processed and produced on a display of the smart glasses as a waveform corresponding to the response. The process can be repeated whereupon a first waveform indicative of no defect in the SUT can be displayed when no defect is detected in the SUT and a second waveform indicative of a defect in the SUT can be displayed when a defect is detected in the SUT.

A method is provided for visualizing, in real time, a signal emitted by a non-destructive testing device including a rigid body, a non-destructive testing sensor connected to the rigid body, and an augmented reality visualization device. The method includes: emitting and receiving the signal by way of the sensor; determining a cut-out of an occlusion inside the mechanical part; determining a signal visualization surface constructed from the paths of the signal; and visualizing a superimposed real view and holographic 3D representation of the mechanical part, of the non-destructive testing sensor, a holographic representation of the cut-out of the occlusion and of the signal visualization surface, which are superimposed on the real view.

An ultrasonic holography imaging system and method are provided. The ultrasonic holography imaging system includes an ultrasonic transducer array coupled to an analog processing section. The analog processing section is coupled to a digital processing section. The digital processing section generates digital signals to be converted by the analog processing section into analog signals that are transmitted to individual transceiver elements within the ultrasonic transducer array to cause separate ones of the individual transceiver elements to emit ultrasonic waveforms that are differentiated from each other by one or more parameters, including amplitude, frequency, and phase or modulation thereof.

Systems and methods of detecting and identifying a leak from a container or building. Acoustic pressure and velocity are measured. Acoustic properties are acquired from the measured values. The acoustic properties are converted to infiltration/leakage information. Nearfield Acoustic Holography (NAH) may be one method to detect the leakages from a container by locating the noise sources.

According to the present disclosure, there is provided a cell stimulation and culture platform using a ultrasonic hologram, including a culture vessel in which a culture well with an open lower portion is formed; a transmission sheet which is installed to cover a lower surface of the culture vessel and where a biological sample is seated; a platform body that is filled with a liquid medium and an open upper end is covered by the transmission sheet; an ultrasonic transducer that is installed inside the platform body in a state of being spaced apart from the biological sample; and an ultrasonic hologram lens that is installed on the ultrasonic transducer, and spatially modulates the phase of the ultrasonic waves using a surface structure designed to have different height distributions to focus the ultrasonic waves in a set pattern shape on a target surface on which the biological sample is located.

A method is provided for calibrating a device for non-destructive inspection of a mechanical part. The device includes an optical movement tracking system to which a reference reference frame is linked, a sensor-holder, a first rigid body, a non-destructive inspection sensor secured to the sensor-holder fixedly linked to the first rigid body, and a computer. The method includes: determination, from three points on a top flat surface of a calibration block, of the length and the width of the calibration block; determination of a first transformation matrix from the reference reference frame to a reference frame of the block linked to the calibration block; disposition of the sensor on the top flat surface of the calibration block; determination, from three points on the first rigid body, of the length and the width of the sensor; and determination of a second transformation matrix making it possible to switch from a reference frame linked to the sensor-holder to a reference frame linked to the sensor.