Improved LIDAR optical system developed by China University of Science and Technology. It can capture people in the city’s smog conditions from the great distances.
According to the Technology Review, physicists at China University of Science and Technology in Shanghai invented a new optical system, which helps people take pictures at great distances.
Specifically, this device was built by physicist Zheng-Ping Li and his colleagues. It can take many pictures from a distance of 45 km even when obscured by haze. This achievement stems from a combination of ultra-sensitive photon sensors and image processing algorithms.
Super sensitive camera system is arranged on the 20th floor of a building at Chongming Island (Shanghai) and the lens is directed to Pudong Civil Aviation building across the river, 45 km away.
The optical technique is based on LIDAR principle – irradiation of objects with lasers and image recognition through reflected light rays. This technique only records photon streams reflected from the object itself. Therefore, it is not affected by photons from other light sources.
The entire improved optical system is only as big as a shoe box. In the future, it can be applied in many areas such as distance positioning or object detection.
Previously, taking photos from a long distance on the earth was a big challenge. The problem is mainly due to limitations in the operating distance of devices that record light reflected from objects.
In addition, environmental factors such as fog or smoke in the city also hinder this problem. In the past, researchers have continued to develop many ultra-sensitive image sensors. Each of these ultra-sensitive devices is capable of recording a photon reflected from the object at distances of up to 10 km. The single data will be aggregated into a complete picture.