OBJECTIVE LENS UNIT AND OPTICAL PICKUP DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain an objective lens unit and an optical pickup device which reduces interference with a stack ring when the objective lens unit is moved to a position close to the stack ring even when working distance is short.

SOLUTION: The objective lens unit, is provided with an objective lens which radiates and condenses a laser beam to an optical disk which is an information recording medium and a mirror frame which holds the objective lens. The mirror frame is chamfered at least a part of a peripheral part on the side close to the rotational center of the optical disk.

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