| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid deterioration of characteristics and damage, breakdowns and the like of an optical lens, an optical recording medium, and an optical recording and reproducing apparatus using these by rapidly detecting a contaminated state of the surfaces of the optical lens and the optical recording medium due to adhering matters and performing specification of the adhering matters, in near field optical recording and/or reproduction. <P>SOLUTION: In a surface state detecting method of the optical lens 41 which constitutes a solid immersion lens or the optical recording medium 1, detection of the surface state of the optical lens 41 or the optical recording medium is performed by comparing measured data of a total reflection optical quantity from the optical lens 41 obtained by introducing light to the optical lens 41 whose surface state is a standard state such as a purified state with measured data of a total reflection light quantity from the optical lens 41 obtained by introducing light to the optical lens 41 whose surface state is a surface to be detected. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
