Optical pickup head and electromagnetic actuating device thereof

An optical pickup head and an electromagnetic actuating device thereof are provided. The electromagnetic actuating device is used to move an objective lens carrier having an objective lens assembly to form an optical pickup head. The electromagnetic actuating device includes at least a magnet, at le...

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Main Authors Peng, Ming-Tsan, Wu, Chun-Te, Chang, Chi-Shen, Lee, Kwen-Jin, Jeng, Tzuan-Ren, Yang, Lei-Ming, Ke, Chau-Yuan, Ju, Jau-Jiu, Wang, Shyh-Jier, Huang, Hai-Jo
Format Patent
LanguageEnglish
Published 02.03.2010
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Summary:An optical pickup head and an electromagnetic actuating device thereof are provided. The electromagnetic actuating device is used to move an objective lens carrier having an objective lens assembly to form an optical pickup head. The electromagnetic actuating device includes at least a magnet, at least a coil, and at least a yoke. The magnet is spaced apart from the objective lens carrier by a distance, and the coil is disposed at the objective lens carrier, for generating an electromagnetic force to interact with the magnet. The yoke is spaced apart from the objective lens carrier by a distance, in which the yoke has a protruding part that extends towards the objective lens carrier and is used to attract magnetic flux lines produced by the magnet, and thus making the magnetic flux that passes through the coil be distributed evenly.