Overview

• Researchers at the University of Science and Technology of China used intensity interferometry with eight infrared laser beams and two telescopes to capture fine details at long range.
• The device achieved a 3 mm resolution—14 times sharper than the diffraction limit of a comparable single telescope—from 1.36 km in an outdoor urban test.
• It successfully imaged letter-shaped targets as small as 1.5 mm in width, demonstrating super-resolution capabilities beyond conventional optical systems.
• Active illumination of the target is required, limiting its use for covert surveillance but fitting applications in remote sensing and non-invasive imaging.
• Team members and external experts foresee that incorporating AI algorithms could refine image reconstruction and improve shape recognition accuracy.