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Penn State researchers receive patent for light-altering acoustic technology Researchers at Penn State have found a way to use ultrasonic and acoustic guided waves to alter how light bounces off of objects, a phenomenon called optical reflection. Image: iStock/@Meindert van der Haven Penn State researchers receive patent for light-altering acoustic technology Tessa M. Pick March 02, 2021 UNIVERSITY PARK, Pa. From navigating ships and submarines using sonar to imaging organs in the human body using ultrasound technology, scientists and engineers have studied the numerous applications of sound waves for decades. Now, researchers at Penn State have found a way to use ultrasonic and acoustic guided waves to alter how light bounces off of objects, a phenomenon called optical reflection. Their technology received a patent on Feb. 2. ....