Novel progress of zone plate coded imaging technique

Summary form only given, as follows. Zone plate coded imaging (ZPCI) technique had been used in laser plasma diagnosis in early years and is still mentioned now. It takes a larger accept solid angle and higher S/N ratio than pinhole imaging for a same resolution, is a good manner for faint radiation (X-ray, particles, etc) high resolution imaging in laser plasma diagnosis. However, the point spread function (PSF) of ZPCI is not an ideal /spl delta/ function. DC component, high order diffraction of a Fresnel zone plate gives disturbances and artifacts in the coded imaging reconstruction which can not neglected and smear the reconstructed image. The side lobe of the PSF also provides serious artifacts which strongly limits that the imaging target must smaller than the first radius of the coded aperture. All the factor mention here takes important drawback for its application in laser plasma diagnosis. The work present here provides a novel way which completely cancels all the deficiencies of ZPCI and gives a throughout improvement.