8 SIMULTANEOUS MULTIPLE SURFACE DESIGN METHOD
8.1 INTRODUCTION
In this chapter we examine the Simultaneous Multiple Surface (SMS) (U.S. Letters Patent, 6,639,733, “High Efficiency Non-Imaging Optics“) design method in 2D geometry. As with the 2D flow-line method, actual concentrators are generated by symmetries from the 2D designs. Typical symmetries are linear and rotational, but none are excluded. This procedure does not ensure the ideality of the actual 3D concentrators. Only the subsets of edge rays that have been used in the 2D design are fulfilling the hypothesis of the edge-ray principle. There is an infinite possible set of edge rays that contain this subset. In some special cases (linear symmetry with constant refractive index distribution, ...
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