Open AccessStudy on the focus performance of micro-focus Fresnel zone plate
Author(s) -
Jianjun Dong,
Leifeng Cao,
Ming Chen,
Xie Chang-Qing,
Du Hua-Bing
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.3044
Subject(s) - zone plate , optics , fresnel number , focus (optics) , pinhole (optics) , fresnel zone , focal length , fresnel diffraction , magnification , planar , fresnel lens , laser , pinhole camera , physics , lens (geology) , image resolution , point spread function , fresnel zone antenna , pixel , diffraction , computer science , telecommunications , computer graphics (images) , smart antenna , dipole antenna , antenna (radio)
The performance of micro-focus Fresnel zone plate(MFZP) with the outermost width of 150nm is tested using the Ti spectral line. Experimental data indicates that the image of pinhole with diameter of 125μm fully responses to a pixel of the X-ray CCD camera. Furthermorethe X-ray focal spot is tested with a magnification of 66 by using laser striking the Ti planar target. The MFZP's point spread function is simulated with the integral formula of Fresnel-Kirchhoff diffraction. The simulated results indicate that the MFZP strongly focuses at double foci. The same results are obtained when the object distance and image distance change but keeping the relation of the lens unchanged. The simulation and the experiment indicate that MFZP can be applied to point-to-point imaging of X-ray to realize high spatial resolution imaging for the laser plasmas.