scerir at libero.it
Sat Apr 26 15:13:24 UTC 2008
... a beam is split, with part going to the object
before hitting a photon-counting detector to capture
light scattered from the object and part going
an equal distance to a digital camera ... where
the object began appearing after about a thousand
coincident pairs of photons were recorded ...
the present experiment
Yanhua Shih et al.
A CCD array is placed facing a chaotic light source
and gated by a photon counting detector that simply
counts all randomly scattered and reflected
photons from an object. A "ghost" image of the object
is then observed in the gated CCD. Differing from
all published ghost-imaging experiments, this setup
captures ghosts from scattered and reflected light
of an object, instead of the transmitted ones.
This new feature is not only useful for practical
applications, but is also important fundamentally.
It further explores the nonclassical interference
nature of thermal light ghost imaging.
the best reviews on quantum imaging
and those past experiments with SPDC
sources and with thermal sources
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