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Incoherent beam shaping with freeform mirror

: Michaelis, D.; Kudaev, S.; Steinkopf, R.; Gebhardt, A.; Schreiber, P.; Bräuer, A.


Winston, R. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Nonimaging Optics and Efficient Illumination Systems V : August 2008, San Diego, CA, USA
Bellingham, WA: SPIE, 2008 (SPIE Proceedings Series 7059)
ISBN: 978-0-8194-7279-3
ISSN: 0277-786X
Paper 705905
Conference "Nonimaging Optics and Efficient Illumination Systems" <5, 2008, San Diego/Calif.>
Conference Paper
Fraunhofer IOF ()
incoherent beam shaping; freedom mirror; single point diamond turning; fast-tool-servo

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.