Sample cell of CGH was designed by recording the complex conjugate information of one object’s Fourier spectrum and the information of the other object’s Fourier spectrum on one hologram,and the two plane objects were reconstructed in the same or different direction and same diffraction order simultaneously,and then two reconstructed image separated from each other in the space to realize the channels change of carrier wave communication.
By means of geologic profile forward modeling technique, we validated the rationality of the structure mode, represented the process of structure evolution happened in the anterior area of middle section of Longmen Mountain.
We inverted a model with several scatterers which formed a letter "A" and the density and the bulk com-phance have been reconstructed simultaneously. The distinct imaging results' show that this algorithm is feasible and can be applied to the imaging of complex structure.
In this paper the imaging of density and bulk compliance by diffraction tomography is being studied on the basis of velocity imaging. By inversion with such different angles, a series of inversion synthetic seismograms will be derived. To fit these seismograms, we can efficiently image density and bulk compliance (or velocity). Compared with pure velocity imaging, this algorithm is more complicated. First, more data of different directions are required; second, we can't make full use of those dafa. Even tho...
Oridinary double-pulse-exposed holography can be used to measure a number of particle parameters, including particle speed, in a dynamic particle field, however, since two particle field images recorede at different pulse moments are reconstructed simultaneously, the direction of particle movement can not he determined. A preliminary report of the technique proposed for alleviating this problem is given in this article, by which two particle field images corresponding to different pulse moments can be recon...
Three plane waves with three equal angles formed by each two wave normal lines are recorded on hologram by three exposures.The hologram is illuminated with the original reference light,then spatial light intensity distribution of hexagonal honeycomb array produced by three ligh beams are obtained.The light intensity distribution is recorded by the positive photoresist plate.The developed photoresist plate is used to replicate a nickel plate by electro forming.Lens arrays are obtained by impressing the nick...