Ghost “pinhole” imaging in Fraunhofer region

Gong, Wenlin; Pengli Zhang; Xia Shen; Shensheng Han
August 2009
Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p071110
Academic Journal
For an aperture with transverse size D, Fraunhofer region is named when the distance between the aperture and the detector is larger than D2/λ, where λ is the wavelength of the illuminating light. For a lensless system, when both reference detector and the object are located in Fraunhofer region relative to the thermal source, we demonstrate that a ghost “pinhole” camera with magnification M=z/z1 can be obtained by the second-order correlation of two light fields even if the test detector is a single pointlike detector. Effects determining the quality of ghost pinhole imaging and its potential applications are also discussed.


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