From the aerospace to semiconductor industries, technical ceramics are gaining traction in many areas of modern manufacturing. Acoustic emission process control holds great potential for the ceramic industry, but conventional sensors face serious challenges in the field. A non-contact ultrasound sensor was recently introduced that addresses these challenges.
Based on a purely optical detection scheme, the sensor combines true impulse response and high sensitivity. This optical microphone, free of moving parts, is suited for on-line quality control of high-value ceramic processes, as well as precision sound field measurements.