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27 August 2008 Incoherent beam shaping with freeform mirror
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Beam shaping of incoherent light sources (LEDs, halogen lamps) for arbitrary target light distribution is obtained by a single free-shape mirror. Special design algorithm ensures continuous profile without abrupt changes and shadowing regions. The mirror is manufactured by single point diamond turning combined with Fast-Tool-Servo (FTS) for simultaneous figuring of base surface and fine structure (for redistributing the light energy). Lateral and axial resolution of the fine structure is determined by FTS and considered during the design and data transfer. Directly turned surfaces can be used as replication tools for polymer or glass moulding and embossing.
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Dirk Michaelis, Sergey Kudaev, Ralf Steinkopf, Andreas Gebhardt, Peter Schreiber, and Andreas Bräuer "Incoherent beam shaping with freeform mirror", Proc. SPIE 7059, Nonimaging Optics and Efficient Illumination Systems V, 705905 (27 August 2008);

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