| 摘要 |
Disclosed is an optical recording/reproducing apparatus capable of performing focus search with high reliability even when a wavefront aberration occurs due to a thickness of a protective layer of an optical disk. The optical recording/reproducing apparatus comprises: an optical system which focuses the beam spot into the recording medium; a spot moving section which moves the beam spot at least in a direction parallel to thickness of the protective layer; a surface detector which detects each of a surface of the protective layer and one or more signal recording surfaces based on a returning light; and a focus controller which starts focusing servo control with respect to the one or more signal recording surfaces when the surface detector detects the surface of the protective layer and thereafter detects the one or more signal recording surfaces.
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