| 摘要 |
<p>An information recorder/reproducer (100) comprising a radiation light source (101) emitting light, means (115) for substantially collimating the light emitted from the radiation light source (101), and means (105) for converging the substantially collimated light to form a light spot on a recording layer (114) through a transparent substrate (113), wherein the collimate means (115) is subjected to chromatic aberration correction such that the substantially collimated light is substantially a plane wave regardless of shift in the wavelength of light emitted from the radiation light source (101), and the light converging means (105) is subjected to chromatic aberration correction such that a light spot is formed on the recording layer (114) regardless of shift in the wavelength of light emitted from the radiation light source (101).</p> |
