A group of scientists who love quantum optics at the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, developed the world's first laser three-dimensional intensity-related imaging camera (also known as a single-pixel three-dimensional camera abroad) and created the first prototype project. Although this camera has only a single pixel, it is easy to get the holographic image of the subject, in civilian and military fields will show their talents.
It is reported that the results from the research led by Han Shensheng, led by the national "863" project "laser three-dimensional intensity associated imaging technology research" and "passive optical multi-spectral intensity correlation imaging technology research."
Shanghai Optical built by the world's first three-dimensional laser intensity correlation imaging engineering prototype
Han Shen-sheng said that the project has completed the experiment of three-dimensional laser intensity correlation imaging in the actual outdoor typical remote sensing scene for the first time in the world and initially established and verified the basic theoretical system of microwave gaze correlation imaging.
3D camera shows the subject's three-dimensional information principle analysis
Usually we see the camera has a uniform name - optical imaging. What the single-pixel 3D camera does is utilize the random fluctuation nature of light and electromagnetic waves for imaging - the quantum imaging, commonly known as "ghost" imaging.
Traditional optical imaging is a light reflected from the object into the lens, falling on the film or electronic components, one by one arranged together to form an image. However, "ghost" imaging has imagined nature as a quantum field composed of innumerable photons. Photons in this field will continue to fluctuate, each state can be calculated. Therefore, to get the image, it is no longer necessary to rely on light to enter the imaging lens, but only to rely on the detection and calculation of the energy of the reflected lightwave - as if the ghosts could have an insight into everything.
3D camera can display the three-dimensional information of the subject (left: general image right: three-dimensional imaging of the picture)
Holographic imaging using 3D cameras allows stealth fighter "failure"
"In the photos of Google Maps, we often see the clouds cover the ground." Gong Wenlin, a project team member, said: "However, using the method of imaging ghosts, we can penetrate the clouds to a large extent. See clearly. "
Remote sensing imaging is one of the important uses of single-pixel 3D cameras. According to reports, the project team in the international community for the first time a large number of sunny, night, clouds, rain and fog and other typical weather conditions of outdoor remote sensing imaging experiments. Experiments have been carried out to realize the intensity correlation imaging with a resolution of 1 cm and a resolution of more than twice that of the super diffraction limit in the detection range of one kilometer in the field. The three-dimensional imaging capability of the active illumination intensity correlation imaging technology, imaging detection sensitivity, Features and Benefits Compared with Existing Remote Sensing Imaging Technology in Weather Conditions.
According to the 2012 mid-term project evaluation report of Shanghai Institute of Machine Tools, the single-pixel 3D camera with a diameter of only 18mm can shoot targets that a 420mm ordinary optical telescope can not capture in a harsh environment. Due to the significant reduction in size and weight, helicopter-borne remote sensing equipment was originally required, which could be fully loaded onto a small UAV after switching to a single-pixel 3D camera.
In addition, the use of 3D camera holographic imaging, the hospital can directly use ordinary light X-ray visible human soft tissue damage, lesions; radar reconnaissance, it will be able to easily distinguish a small spot into the reconnaissance area is a small bright spot Birds or a plane, whether civilian or military areas, stealth fighters are basically "failure."
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