54 research outputs found
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
The effect of spatial transverse coherence property of a thermal source on Ghost imaging and Ghost imaging via compressive sampling
Both ghost imaging (GI) and ghost imaging via compressive sampling (GICS) can
nonlocally image an object. We report the influence of spatial transverse
coherence property of a thermal source on GI and GICS and show that, using the
same acquisition numbers, the signal-to-noise ratio (SNR) of images recovered
by GI will be reduced while the quality of reconstructed images will be
enhanced for GICS as the spatial transverse coherence lengths located on the
object plane are decreased. Differences between GI and GICS, methods to further
improve the quality and image extraction efficiency of GICS, and its potential
applications are also discussed.Comment: 7 pages, 5 figure
Ghost imaging lidar via sparsity constraints
For remote sensing, high-resolution imaging techniques are helpful to catch
more characteristic information of the target. We extend pseudo-thermal light
ghost imaging to the area of remote imaging and propose a ghost imaging lidar
system. For the first time, we demonstrate experimentally that the real-space
image of a target at about 1.0 km range with 20 mm resolution is achieved by
ghost imaging via sparsity constraints (GISC) technique. The characters of GISC
technique compared to the existing lidar systems are also discussed.Comment: 4pages, 3figure
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