New Technology Allows Reading Text from 1.36 Kilometers Away
Imagine being able to read tiny text from a distance of 1.36 kilometers – that’s exactly what a groundbreaking new device demonstrated by researchers can do. While most of us struggle to read small text even a few meters away, this innovative technology takes imaging to a whole new level.
Known as intensity interferometry, this device doesn’t rely on conventional cameras to capture images. Instead, it measures how light reflects and interferes with itself to compile an image. In a recent study led by researchers from the University of Science and Technology of China, an instrument emitting eight infrared laser beams was used to scan text from a great distance.
By carefully calibrating the laser beams and using two telescopes to capture light intensity, the researchers were able to reconstruct an image with remarkable clarity and precision. This method allowed them to achieve a resolution enhancement of about 14 times over the diffraction limit of a single telescope.
Long-range cameras using this technology have a wide range of applications, from space telescopes to remote sensors. The method can even handle atmospheric turbulence and imperfections in the camera setup, making it a versatile tool for various imaging purposes.
The researchers were able to read text at a resolution of 3 mm from 1.36 km away, showcasing the potential of intensity interferometry. This technology, originally used in space observatories, is now being applied in various fields on Earth, including advanced physics experiments.
According to the researchers, further improvements can be made in controlling the infrared laser lights and implementing AI algorithms to enhance text and shape recognition accuracy. This advancement in imaging distant objects without emitting light has significant implications for optical imaging and sensing.
Optics researcher Shaurya Aarav from Sorbonne University praised the study, stating that the new technology represents a major technical advancement in high-resolution optical imaging of distant objects. The research findings have been published in Physical Review Letters.
