| 摘要 |
An object-lens device for an optical pick-up head includes an object lens and an adapting device. The object lens includes a first surface and a second surface, which faces outwardly from the optical pickup head. The adapting device includes a base part for containing the first surface. The base part includes a first circular opening and a second circular opening. The first surface pierces the first circular opening to combine with the base part, and the laser beam emitted by the optical pickup head projects into the first surface through the second circular opening.
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