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Rational polygonal scanner for HDTV applications made of glassceramics

: Risse, S.; Guyenot, V.; Gebhardt, A.

Kunzmann, H.:
Progress in Precision Engineering and Nanotechnology
Braunschweig: Wirtschaftsverlag NW, 1997
ISBN: 3-9801433-9-2
pp.711-713 (Vol.2)
International Precision Engineering Seminar (IPES) <9, 1997, Braunschweig>
International Conference on Ultraprecision in Manufacturing Engineering (UMES) <4, 1997, Braunschweig>
Conference Paper
Fraunhofer IOF ()

A new direction in the field of precision bearing technology is the use of non-metallic non-organics as bearing materials. The Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany, develops new aerodynamic air bearing systems using glass and glassceramics as bearing materials. Sophisticated processes and techniques borrowed from optics and optical assembly can be transferred to realize bearings with unique characteristics. Our current research succeeds from a first-ever, Fraunhofer design and construction of a double spherical air bearing made of glass based on an aerodynamic, admission restrictor design principle and featuring maintainance-free, static-free, virtually soundless operation. The concept for this orginal bearing involved combining the bearing with an integrated polygonal mirror and a drive, forming a high-speed rotating polygonal scanner to deflect an incoming laser beam. This scanner device is undergoing further development as part of a BMBF ( Bundesministerium für Forschung & Technologie) project with the title; "Laser-color Pictures & Laser Projection Systems - FABIAN". Using our experience in the fields of optics and optical assembly, we are able to realize precision bearings, made of glass and glassceramics, with speed to 5000 rpm, runout error at 4800 rpm of 30 nm and wobble at 3000 rpm of 0.2.