We have developed a very broadband ultrasonic transducer (pulse length up to 20 ns) and are now searching for applications, which can not be solved satisfying by using traditional transducers.
This kind of transducer is much cheaper than traditional construction and his pulse answer is very repeatable. It is possible to use the idea of this transducer to make transducers with longer pulses too.
: This kind of transducer can be used for detecting very : small cracks in materials and for measuring thet : hickness of thin walls or layers.
: Which mean frequency has the transducer? Which bandwidth? Is it an immersion transducer or a contact transducer? For which acoustic impedance is it adapted?
It is possible to make this transducer with mean frequency from at least 1 MHz (but there is no reason, why it couldn´t be even lower), the highest frequency that we achieved was 22 MHz. The standard version that we use for our fingerprint devices has the mean frequency of about 12 MHz and 3 dB bandwith of 4-20 MHz.
We are using them in water, but it is possible to use them also in contact.
You shoud see the information on the following page: http://www.optel.com.pl/manual/english/transd.htm
We are not ready with the development and are also interesting in finding partners, interested in cooperation, using, marketing and so on of this novel kind of transducer.