| 摘要 |
<p>An optical recording apparatus is provided in which the distance between the surface of a solid immersion lens and the optical recording medium can be maintained constant to prevent defocusing, whether the disk is rotating or not, even if scars or depressions exist in the surface of the medium, and which can record data a high density and which can be manufactured with ease. The apparatus comprises first optical means for condensing light to be applied to an optical recording medium, second optical means interposed between the first optical means and the optical recording medium, for attaining a numerical aperture larger than the numerical aperture of the first optical means, and main control means for maintaining a predetermined distance between the second optical means and the recording medium, by utilizing a linear characteristic of an amount of light reflected from the optical recording medium in a near-field region provided between an end of the second optical means and the optical recording medium. <IMAGE></p> |
