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ELEMENT-SPECIFIC X-RAY FLUORESCENCE MICROSCOPE USING MULTIPLE IMAGING SYSTEMS COMPRISING A ZONE PLATE
ELEMENT-SPECIFIC X-RAY FLUORESCENCE MICROSCOPE USING MULTIPLE IMAGING SYSTEMS COMPRISING A ZONE PLATE
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机译:使用包含区域板的多个成像系统的特定元素X射线荧光显微镜
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摘要
An element-specific imaging technique utilizes the element-specific fluorescence X-rays that are induced by primary ionizing radiation. The fluorescence X-rays from an element of interest are then preferentially imaged onto a detector using an optical train. The preferential imaging of the optical train is achieved using a chromatic lens in a suitably configured imaging system. A zone plate is an example of such a chromatic lens; its focal length is inversely proportional to the X-ray wavelength. Enhancement of preferential imaging of a given element in the test sample can be obtained if the zone plate lens itself is made of a compound containing substantially the same element. For example, when imaging copper using the Cu La spectral line, a copper zone plate lens is used. Furthermore, multiple imaging systems are used to increase throughput and to perform stereoscopic or tomographic imaging.
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