US Patent 8009526 Optical pickup device and collimate lens
Patent 8009526 was granted and assigned to Panasonic on August, 2011 by the United States Patent and Trademark Office.
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It is an object of the present invention to provide an optical pickup device being capable of correcting coma aberration induced in a light-condensing optical system including an objective lens for an optical disc and having a reduced size and a reduced thickness in comparison with the conventional art. The present invention includes a first coma-aberration correction actuator (6) including a first tilt drive portion for inclining an objective lens in a first tilt direction, and a second coma-aberration correction actuator (7) including a second tilt drive portion for inclining, in a second tilt direction, a coma-aberration correction lens placed between a light source and a raising mirror for reflecting emitted light toward the objective lens.
US Patent 08009526 Optical pickup device and collimate lens US Patent 8009526 Optical pickup device and collimate lens
US Patent 08009526 Optical pickup device and collimate lens
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