Ghost imaging

Ghost imaging is a quantum mechanical technique that allows an special digital camera to produce an image of an object which the camera cannot itself see . It utilizes paired photons generated by the same source to build up an image of the unseen object. The quantum effect is known as "two-photon interference". One of the photons stikes the object , the other follows a different path to the camera's lens. The camera is constructed to only record pixels from photons that hit simultaneously at the object and the camera's image plane.

References

• Quantum camera snaps objects it cannot 'see' by Belle Dume, New Scientist, 02 May 2008. Accessed July 2008
• Air Force Demonstrates 'Ghost Imaging' By Sharon Weinberger , Wired, 03 June 2008. Accessed July 2008