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5 January 2001 Optimization of depth-graded multilayer designs for EUV and x-ray optics
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The optimization of the design of depth-graded multilayers with special angular or wavelength responses for use as coatings in EUV/X-ray optics is discussed in this presentation. The optimization is based on the well-known Fresnel equations and recursive calculation combined with a defined merit function, with random variation of the thickness of each layer. The optimization of depth-graded multilayers for various applications uses a process that judges a design based on its required performance in a given range of wavelength and/or incidence angle. The requirements could include many factors such as the spectral distribution of a source, the shape of the reflectivity curve or the geometry of the optical system. The key factor for optimization is to determine a suitable merit function for a specific application. This allows the design of multilayers for different requirements. The method has been used to give the thickness of each layer in some depth-graded multilayers with special requirements in optical properties.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhanshan Wang and Alan G. Michette "Optimization of depth-graded multilayer designs for EUV and x-ray optics", Proc. SPIE 4145, Advances in X-Ray Optics, (5 January 2001);

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