3D ghost imaging. Left: conventional telephoto image; right: 3D ghost image with distance (790 to 1008 meters)
represented by color (credit: Wenlin Gong et al.)

First 3D ghost images from a single pixel

January 29, 2013

Shanghai Institute of Optics and Fine Mechanics in China physicists have designed and built a remote-sensing “ghost imaging” device that uses a single pixel to record three-dimensional images, MIT Technology Review reports.

Ghost imaging is the extraordinary technique of bouncing a laser beam off an object and making high quality images from the reflected light using a single pixel. This single pixel is used to record data points over a series of time slices; the data is then stitched together to create the image.

There is no scanning involved. Instead, the data from the single pixel is compared against the intensity of the original laser beam, which must be randomized by passing it through frosted glass. Then any correlations between the original and reflected beam reveal information about the object in the image.

It is these correlations that physicists use to assemble the picture, known as a ghost image.

Read more: First 3D ghost images from a single pixel | KurzweilAI.

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