Laser ultrasonic testing includes a laser apparatus; a splitting unit that splits a pulsed laser from the laser apparatus into first and second lasers; a first pulse width conversion unit that converts a pulse width of the first laser; a first optical system that guides the first laser having the converted pulse width to a test object; a second pulse width conversion unit that converts a pulse width of the second laser; a pulse propagation time adjustment unit that adjusts a propagation time of the second laser having the converted pulse width; a second optical system that guides the second laser having the converted pulse width and adjusted propagation time to the test object; and a detection unit that detects a surface displacement change of the test object caused by an ultrasonic wave generated by the first laser when the second laser is reflected by the test object.

A photoacoustic probe includes: a light source which generates light to be irradiated on an object; a probe body including a receiving portion which receives a photoacoustic wave generated from the object in response to irradiation of the light emitted from the light source on the object and a contact portion which contacts the object; and an attachment to which the probe body and the light source are attached, wherein the light source is attachable to and detachable from the attachment from a side different from the object side where the contact portion contacts the object.

Optical fiber based acoustic sensors are provided herein. The optical fiber based acoustic sensors described herein include acoustically responsive optical structures configured to detect and receive acoustic signals, including ultrasound signals, and provide associated optical signals to a system for processing and interpretation to implement tracking, location, and imaging capabilities. Optical fiber based sensors provided herein may be disposed at ends of or along the length of optic fibers. Optical fiber based sensors may be included within various devices, including, for example, medical devices. Optical fiber based sensors may provide a compact technology with high sensitivity to visualize and track objects and provide anatomical imaging.

An ultrasonic transducer comprising a coupling element and a piezo element, wherein a metal disk is arranged between the coupling element and the piezo element, wherein the metal disk is connected with the piezo element or with the coupling element by means of an adhesive layer, characterized in that the adhesive layer is producible, at least in certain regions, by means of a photochemically curable adhesive.

A laser displacement meter includes: a laser array beam source unit including a plurality of lasers emitting beams with different wavelengths; a lens array unit including a plurality of lenses for focusing laser beams; a reflected beam lens array unit including a plurality of focusing lenses for focusing the beam reflected on the surface of the object; an optical filter array unit including a plurality of optical filters through which the reflected beam is selectively transmitted; and a photodetector array unit including a plurality of photodetectors for detecting the beam transmitted through the optical filters.

A system and method for measuring the vibrations of a test object, such as a machine shaft or other rotating equipment. The system includes a probe sensor fitting having an ultrasonic speaker and an ultrasonic microphone. The probe sensor fitting includes a temperature and relative humidity sensor. The system further includes a probe analyzer circuit with a microcomputer that generates vibration analysis data and probe health diagnostics.

A method and assembly are provided in order to inspect a partially cured repair patch prior to installation. For example, an assembly for inspecting a repair patch is provided that includes a partially cured repair patch comprised of a composite material. The assembly also includes an acoustic facilitation layer disposed proximate of the surface of the repair patch through which ultrasonic signals will be introduced. The assembly further includes a vacuum bag surrounding the repair patch and the acoustic facilitation layer. The acoustic facilitation layer has an acoustic impedance that is closer to the respective acoustic impedances of the repair patch and the vacuum bag than the acoustic impedance of air is to the respective acoustic impedances of the repair patch and the vacuum bag.

A non-destructive method for the condition assessment of a turbine component is provided. A pulsed laser is used to excite a desired surface of the turbine component by directing the pulsed laser at the desired surface to couple ultrasonic energy into the surface of the turbine component. A thermographic image of the desired surface under the influence of the ultrasonic is captured by an image receiver. A system for the non-destructive detection of defects in a material utilizing acoustic thermography is also provided. The system includes a pulsed laser to couple ultrasonic energy into the material, an infrared camera to capture the thermographic image, and a processor communicatively coupled to the infrared camera to receive, store, and analyze the thermographic image.

A laser displacement meter includes: a laser array beam source unit including a plurality of lasers emitting beams with different wavelengths; a lens array unit including a plurality of lenses for focusing laser beams; a reflected beam lens array unit including a plurality of focusing lenses for focusing the beam reflected on the surface of the object; an optical filter array unit including a plurality of optical filters through which the reflected beam is selectively transmitted; and a photodetector array unit including a plurality of photodetectors for detecting the beam transmitted through the optical filters.

An imaging system is configured for generating vibration region caused by ultrasound wave thereby to obtain a plurality of optically-sectioned images. In the imaging system, a stage is operable to be moved along a plurality of scanning imaging positions, and applied to deposit an object with at least one scattering material. When the object receives an ultrasound wave, a shear wave is generated to displace the scattering material thereby to form a vibration region. A laser generating device is configured to transmit a laser beam, which penetrates the vibration region to form a speckle pattern and focused at a focusing position. An optical imaging device is set at the focusing position to receive the laser beam to generate a plurality of scanning optically-sectioned images with respect to the scanning imaging positions.