Optimising the performance of optical data storage drives based on a novel seesaw–swivel actuator for a holographic module

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Optimising the performance of optical data storage drives based on a novel seesaw–swivel actuator for a holographic module

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Published

This Letter presents an optical module with a holographic optical element (HOE) for the small-form-factor pickup head. The proposed module is mounted on a novel seesaw swivel-drive mechanism with unique features, including a rotary actuator for track-following; in addition, a seesaw arm nutates along a pivot for laser focusing. Additionally, the actuating force is increased within the limit of actuator size constraints by using a Halbach-magnet-array in biaxial voice coil motors. Experimental assessment of the holographic module and actuator reveals that the HOE module ensures the optical performance and stability of the system, together with a performance superior to a classic hinge-type swing arm actuator, as attributed to enhanced durability and higher robustness.

Inspec keywords: holographic storage; durability; pick-ups; actuators; holographic optical elements; optical focusing

Other keywords: Halbach-magnet-array; optical data storage drives; laser focusing; system durability; optical stability; seesaw swivel-drive mechanism; hinge-type swing arm actuator; rotary actuator; small-form-factor pickup head; biaxial voice coil motors; holographic optical element; optical performance; optical module

Subjects: Optical storage and retrieval; Holographic optical elements; holographic gratings; Holography; Optical storage and retrieval; Applications of holography

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2011.0135
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