Scientists at University of Glasgow's School of Physics and Astronomy discovered a new less expensive technique of creating 3D images. They created a system which makes use of the detectors that have single pixel for sensing the light instead of various pixels used in imaging sensors found in digital cameras.
The detectors have the capability of judging the frequencies beyond visible light, which in turn would help in various new applications for 3D imaging in geography and medicine. The scientists explained that the single pixel detectors will cost just a few pounds in comparison to present systems which amount to thousands of pounds.
The scientists believe that the ability of this system to sense the wavelengths beyond digital cameras’ capabilities, as well as its low cost would result in making it a valuable tool for various industries. Possible applications include use in medical industry for finding tumours.
Prof Miles Padgett, the lead researcher of the team at University of Glasgow's School of Physics and Astronomy explained that single pixel detectors in four locations can be used for detecting the light from data projector, which elucidates objects with the sequence of black-and-white patterns. 3D images were created with the combination of images from four detectors while making use of a technique known as shape from shade.
The 3D computational imaging, also known as ghost imaging produces the detailed images of the objects in merely a few seconds. Conventional 3D imaging systems make use of multiple digital camera sensors for producing 3D image from 2D information. However, there is a need of careful calibration for making sure that multi-megapixel images align properly.
The digital camera sensors have restricted sensitivity beyond spectrum of light, where single pixel detector can be used for capturing information beyond visible reaching wavelengths from the X-ray to TeraHertz.