Enhancement of optical adaptive sensing by using a dual-stage seesaw-swivel actuator with a tunable vibration absorber

Technological obstacles to the use of rotary-type swing arm actuators to actuate optical pickup modules in small-form-factor (SFF) disk drives stem from a hinge's skewed actuation, subsequently inducing off-axis aberrations and deteriorating optical quality. This work describes a dual-stage see...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2011-05, Vol.11 (5), p.4808-4829
Main Authors: Chou, Po-Chien, Lin, Yu-Cheng, Cheng, Stone
Format: Article
Language:English
Subjects:
absorber
Carbon
Design optimization
Disk drives
Equipment Design
Optics
PZT
Sensors
small-form-factor
swing arm
Systems stability
VCM
Vibration
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Summary:Technological obstacles to the use of rotary-type swing arm actuators to actuate optical pickup modules in small-form-factor (SFF) disk drives stem from a hinge's skewed actuation, subsequently inducing off-axis aberrations and deteriorating optical quality. This work describes a dual-stage seesaw-swivel actuator for optical pickup actuation. A triple-layered bimorph bender made of piezoelectric materials (PZTs) is connected to the suspension of the pickup head, while the tunable vibration absorber (TVA) unit is mounted on the seesaw swing arm to offer a balanced force to reduce vibrations in a focusing direction. Both PZT and TVA are designed to satisfy stable focusing operation operational requirements and compensate for the tilt angle or deformation of a disc. Finally, simulation results verify the performance of the dual-stage seesaw-swivel actuator, along with experimental procedures and parametric design optimization confirming the effectiveness of the proposed system.
ISSN:1424-8220
1424-8220
DOI:10.3390/s110504808