Researchers at the University of Science and Technology of China have developed a groundbreaking laser device that can read small text from distances greater than one kilometer, as reported by BGR citing the scientific journal Physical Review Letters. By employing active intensity interferometry, they have managed to overcome traditional limitations of optics and atmospheric disturbances.

Unlike conventional cameras that collect light waves through lenses, this laser device utilizes multiple emitters to create pseudo-thermal illumination. Reflected laser beams are captured by two telescopes, and the acquired data are processed with a specialized algorithm that allows for the reconstruction of images with high detail.

The scientists conducted an experiment where aluminum plates with the letters "USTC" cut out were placed 1.36 km away, with each letter measuring 8×9 mm and a width of only 1.5 mm. The laser system successfully read the text, achieving a resolution that exceeds the theoretical limit of a single telescope by 14 times. The technology operates even when the signal is weak or distorted, including due to weather conditions.

Although this development is still in the research phase, it holds significant potential for applications in remote sensing, non-contact visualization in challenging conditions, and high-precision monitoring. In the future, it could become a vital tool for public safety and disaster monitoring.