| 摘要 |
<p>A spherical aberration correcting apparatus is incorporated in an information recording system and gives the system a function of correcting spherical aberration in a real-time and effective manner under a recording operation of pieces of information. The spherical aberration correcting apparatus comprises a recording unit (50(2,4,8)), reflected-light level detecting unit (51(5,6)), correction amount deciding unit (52(6)), and spherical aberration correcting unit (53(7)). The recording unit records a piece of information through radiation of an optical beam (9) onto an optical disk (D). The detecting unit detects a level of light formed of the optical beam reflected from the optical disk under a recording operation for the information, while the deciding unit decides a correction amount for spherical aberration on the basis of the level of the reflected-light. The correcting unit corrects the spherical aberration by using the correction amount. <IMAGE></p> |
