Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-12-12
2006-12-12
Sniezek, Andrew L. (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C250S559360
Reexamination Certificate
active
07149050
ABSTRACT:
According to one aspect, systems and methods are provided for detecting the relative position of a transducer head with respect to a storage medium utilizing optically diffractive media. In one example, a head positioning servo system includes a transducer head assembly, a diffractive medium spatially fixed with respect to the transducer head assembly, a light source for illuminating at least a portion of a magnetic storage medium and the diffractive medium, a detector for detecting light from the light source illuminating the magnetic storage medium and the diffractive medium, and a controller for adjusting the position of the transducer head with respect to the magnetic storage medium in response to the detected light.
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Cappabianca Leo
Saliba George A.
Morrison & Foerster / LLP
Quantum Corporation
Sniezek Andrew L.
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