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Design of a fast and high precision polygonal scanner for HDTV

: Risse, S.; Guyenot, V.

Beiser, L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Optical scanning systems. Design and applications
Bellingham, Wash.: SPIE, 1997 (SPIE Proceedings Series 3131)
ISBN: 0-8194-2553-2
Annual Meeting "Optical Science, Engineering and Instrumentation" <1997, San Diego/Calif.>
Fraunhofer IOF ()
air bearing; double sherical bearing; glassceramic bearing; high definition television; rotation polygonal scanner; scanner; self-acting bearing

With the continuing development of Laser-Display-Technology, a new possibility for the production high level image projection is forwarded and with it the beginning of a new era in television: TV picture formats previously thought impossible, the sharpness, color intensity and unsurpassed resolution of which make the dream of home cinema a reality. The key to this experience is visible laser light in red, green and blue, projected on screen with the aid of horizontal and vertical deflection units. In this paper, a primarily horizontal deflection system in the form of a rotating polygonal scanner is decribed. The design of this scanner assembly combines a double sherical air bearing with integreated polygonal mirror for deflection and a high torque inside drive for quickly reaching high rotation. The Fraunhofer institute of Applied Optics and Precision Engineering (I0IF-Jena) develops, from conception to assembled prototype, new self-acting precision bearing systems. This new scanner so lution developed out of IOF's previous developments resulting in the first ever sealed, minimal-maintenance, self-acting bearing.