提出了一种新的光学排列几何并进行了衍射增强实验。应用新光学排列几何首次获得了与入射白光 X 射线尺寸相当的、大的成像光斑均匀区域
因而新光学排列几何更适合于大尺寸样品的研究工作。同时
该光学排列几何成像分辨率可以达到微米量级并且更方便于实验操作。
Abstract
As a technique for X-ray phase contrast imaging
diffraction-enhanced imaging (DEI) attracts much interest for its high resolution and good image quality. Some research work has also been carried out at Beijing Synchrotron Radiation Facility (BSRF) during the past few years. In general DEI set-up
the obtainable image area is less than 20 mm×4 mm when cross section of the incident “white” X-ray beam is 20 mm×10 mm
which means general DEI set-up is deficient for large samples. Based on the analysis of general DEI set-up
a new set-up has been designed and applied in DEI experiments. In new DEI set-up
obtainable image area is for the first time as large as incident “white” X-ray beam. Resolution of image obtained using new DEI set-up is around the order of micrometer.