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Sound, sculpted in glass
Laser-engraved glass can shape megahertz ultrasound with far lower losses than 3D-printed polymer holograms. The authors show how refracto-vibrometry measures the sound field directly inside the glass and …
10 min
Resonant frequency and damping analysis of high-temperature materials
At high temperatures, increasing damping pushes microphone-based RFDA to its limits. Learn how IMCE combines RFDA with Polytec's QTec laser Doppler vibrometry to measure elastic properties reliably, even u…
5 min
Making ultrasound visible
Sound at higher frequencies that is inaudible to the human ear is commonly referred to as “ultrasound.” Nevertheless, ultrasound can be made visible to the human eye with the aid of optical measurement tec…
6 min