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Rotating device and light beam deflecting apparatus

Image Number 3 for United States Patent #5946122.

In a rotating device which comprises a rotor; a radial bearing; a lower thrust bearing; a dynamic pressure generating means, a radial bearing area (mm.sup.2) which is the area of the rotor facing the radial bearing, a thrust bearing area (mm.sup.2) which is the area of the rotor facing the lower thrust bearing, and the rotor weight (g) are determined so as to satisfy the following formula:

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