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Pinhole imaging in different regions.
Scheme for ghost pinhole imaging with thermal light.
The explanation of ghost pinhole imaging in Fraunhofer region.
(I). The second-order correlation function between two paths. On the left upper side is the correlation of the speckles and the Gaussian curve displays the horizontal section of the image. (II) Images in spatial domain when the object is fixed in different positions with and , (a). the object; (b). ; (c). ; and (d). ; (III) Ghost images obtained by correlation measurement in different transverse sizes of the thermal source when , , and , (a) , ; and (c). .
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