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Superconductive Eddy-Current Dampener for M-O Device

IP.com Disclosure Number: IPCOM000037497D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Weinstein, RE: AUTHOR [+2]

Abstract

A problem in magento-optic recording is controlling the mechanical transients in the head actuator when performing a seek or track following operation. These transients are in the form of axial, bending and torsion modes of vibration.

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Superconductive Eddy-Current Dampener for M-O Device

A problem in magento-optic recording is controlling the mechanical transients in the head actuator when performing a seek or track following operation. These transients are in the form of axial, bending and torsion modes of vibration.

One way to dampen and control these transients is by use of an eddy-current dampener. Such a dampener constructed of superconducting materials would be smaller and lighter than those made of conventional materials.

Figure 1 shows a fine-seek mechanism of a magneto-optic device. Parallel pairs of beams provide stable seek (11) and focus (20) motion of the objective lens (30). This motion is generated by seek/focus coils (40). Parallel pairs of beams are used because they provide flexure without angular distortion.

A superconductive eddy-current dampener (50,51) is used to prevent out-of- phase transverse vibration of the parallel beams, and vibrations in the focus plane of the beams. Such out-of-phase transverse vibration, shown in Figure 2, can result in bit-jitter and data reliability errors.

Disclosed anonymously.

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