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OpenDDA: Home page
OpenDDA is a highly optimised computational framework, written in the C language, for the Discrete Dipole Approximation, a numerical method for calculating the optical properties associated with a target of arbitrary geometry that is widely used in atmospheric, astrophysical and industrial simulations. Core optimisations include the bit-fielding of integer data and iterative methods that complement a new Discrete Fourier Transform (DFT) kernel, which efficiently calculates the matrix-vector products required by these iterative solution schemes. The new kernel performs the requisite 3D DFTs as ensembles of 1D transforms, and by doing so, is able to reduce the number of constituent 1D transforms by 60% and the memory by over 80%. The optimisations also facilitate the use of parallel techniques to further enhance the performance. Complete OpenMP-based shared-memory and MPI-based distributed-memory implementations have been created to take full advantage of the various architectures.
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Precision Flat Optics - glass wafers, quartz and borofloat wafers, colored glass filters, custom optics and CNC Machining, all from Sydor Optics. - Sydor Optics
Specializing in precision flat optics, parallel optics, wedged optics, glass wafers, borofloat wafers, colored glass filters and custom optics, Sydor Optics is your source for cost-effective components. From prototype to large volume products, Sydor Optics handles all your Flat Optics needs.
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