| 摘要 |
An optical pickup apparatus includes a lens unit which is composed of a first lens group having at least one lens and a second lens group having at least one lens. The first lens group and the second lens group are supported by support members which are engaged with each other. The first lens group and the second lens group are slid in an optical axis direction to change a relative positional relationship between the lens groups, thereby correcting spherical aberration caused in a recording surface of an optical recording medium.
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