Miniature optical sensor achieves 25,000

A joint research team led by Professors Sangyoon Han and Jaesok Yu of the Department of Robotics and Mechatronics Engineering at DGIST has developed the world's first miniature optical ultrasonic sensor, thinner than a human hair, using semiconductor fabrication processes. The sensor can precisely detect megahertz (MHz)-range ultrasound transmitted through the air without directly contacting the target object and is expected to revolutionize nondestructive testing technologies for detecting internal defects in semiconductors and secondary batteries. > Warta ini dikurasi secara otomatis dari sindikasi media resmi **Tech Xplore**. Seluruh hak cipta artikel, investigasi, dan naskah penuh merupakan milik penerbit asli. Full investigative context and verified commentary are published by **Tech Xplore**. [Read Full Story on Tech Xplore →](https://techxplore.com/news/2026-09-miniature-optical-sensor-higher-airborne.html)