| 摘要 |
A recording apparatus capable of recording an optical disk obtained by adhering two substrates having predetermined curvatures with the convex surfaces of the substrates being adhered, wherein a light source irradiates light through an optical set to the optical disk via a converging lens. Plural light detectors are provided for photoelectrically converting reflection light from the data recording surface of the optical disk and returning through the optical set to output respective signals corresponding to a difference in distance between the lens and the data recording surface, a difference between the center of a light beam spot formed at a focal point position of the lens in a center of either one of a track and a pit line on the data recording surface, and a degree of tilt of the data recording surface. Lens movement mechanisms are provided to move the lens perpendicular and parallel to the data recording surface and to cancel the tilt. The signal recording on the disk is reproduced and output from the apparatus.
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