Jpn. J. Appl. Phys. 46 (2007) pp. 3755-3757  |Previous Article| |Next Article|  |Table of Contents|
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Feasibility Study of Contactless Power Supply for Layer-Selection-Type Recordable Multi Layer Optical Disk

Yuji Fujita, Akemi Hirotsune1, and Yasuo Amano

Production Engineering Research Laboratory, Hitachi, Ltd., Yokohama 244-0817, Japan
1Storage Technology Research Center, Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan

(Received November 20, 2006; accepted January 23, 2007; published online June 22, 2007)

Using rotary transformers, we developed a contactless power supply mechanism for a layer-selection-type recordable multi layer optical disk. This method provides stable resistance during disk rotation and requires minimum space for power supply mechanism. Our prototype transmits sufficient electrical power to change the optical reflectivity of the rotating disk. We studied the miniaturization of an optical drive and concluded that a slim-type drive is feasible with this contactless power supply mechanism.

DOI: 10.1143/JJAP.46.3755
KEYWORDS:contactless, power supply, rotary transformers, drive mechanism, slim-type

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