Utilizing optical and semiconductor fabrication techniques, Imaginant offers RoHS-compliant delay-line ultrasound transducers with center frequencies ranging from 75 MHz to 250 MHz (higher transducer frequencies are available as special orders). Imaginant transducers exhibit high reliability and are available in focused and flat-face models with various characteristics including lightly-damped models for applications requiring maximal sensitivity and highly-damped high-bandwidth models for precision applications requiring a high degree of temporal resolution.
An example of the delay-line echo from an Imaginant high-frequency transducer is shown below left. This well-damped transducer exhibits a 270 MHz peak frequency and broad bandwidth as indicated in the frequency spectrum of the delay line echo shown below right.
Please contact us for details on our high-frequency contact and immersion transducer models, customization options, and lead times. We are happy to consult on a transducer design that will enable your success.
As their name implies, contact transducers are placed into direct contact with test objects with a thin layer of couplant between the transducer and object. The couplant facilitates the transfer of ultrasound from the transducer into the object, but in addition the central region of the transducer's face must make good contact with the surface of the test object. Imaginant's standard contact transducers are flat faced, but customization to other shapes is possible. To optimize the transducer for a specific measurement, the transducer's center frequency, beam diameter, degree of damping, and delay line length must be all be optimized. We welcome the chance to consult with you on your transducer requirements.
Immersion transducers employ a coupling medium such as water to convey ultrasound from the transducer to a test object. These transducers are commonly used in equipment such as scanning acoustic microscopes and often incorporate a lens on the transducer's face to focus the ultrasound beam so as to improve the detection of small features in the test object. The transducer's performance must be optimized for a given application which includes careful selection of the transducer center frequency, beam diameter, degree of damping, lens design, and delay line length. Feel free to contact us to discuss your system and transducer requirements.