| 摘要 |
PURPOSE: An optical pickup actuator is provided to form a closed circuit system with a magnetic flux generated from a single-pole magnet and magnetic yokes, thereby improving the driving force of focussing, tracking and tilting coils at corresponding positions. CONSTITUTION: An optical pickup actuator includes two single-pole magnets having different polarities, and magnetic yokes partially coupled with lower sides of the single-pole magnets. The magnetic yokes surround the single-pole magnets and are formed with the same height from the lower sides of the single-pole magnets. The magnetic yokes are induced with magnetic polarities opposite from the coupled single-pole magnets, thereby magnetic flux is generated in a closed circuit form.
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