55 research outputs found
Theoretical investigation of the quantum noise in ghost imaging
Ghost imaging is a method to nonlocally image an object by transmitting pairs
of entangled photons through the object and a reference optical system
respectively. We present a theoretical analysis of the quantum noise in this
imaging technique. The dependence of the noise on the properties of the
apertures in the imaging system are discussed and demonstrated with a numerical
example. For a given source, the resolution and the signal-to-noise ratio
cannot be improved at the same time
Transmission area and two-photon correlated imaging
The relationship between transmission area of an object imaged and the
visibility of its image is investigated in a lensless system. We show that the
changes of the visibility are quite different when the transmission area is
varied by different manners. An increase of the transmission by adding the slit
number leads to a decrease of the visibility. While, the change is adverse when
the slit width is widened for a given distance between two slits.Comment: 10 pages, 4 figure
Imaging in scattering media via the second-order correlation of light field
Imaging with the second-order correlation of two light fields is a method to
image an object by two-photon interference involving a joint detection of two
photons at distant space-time points. We demonstrate for the first time that an
image with high quality can still be obtained in the scattering media by
applying the second-order correlation of illuminating light field. The
scattering effect on the visibility of images is analyzed both theoretically
and experimentally. Potential applications and the methods to further improve
the visibility of the images in scattering media are also discussed.Comment: 4 pages, 3 figure
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