| 摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize the recording and reproducing property of an optical disk by a small constitution. <P>SOLUTION: A stray light beam L14 reflected by a dichroic beam splitter plate 28 is reflected by a wavelength selective beam splitter 26, and a stray light beam L15 consisting of diffusing light is emitted to a front photodetector 30. Accordingly, the stray light beam L15 of a light quantity markedly smaller than that of a light beam L12F is emitted. Thus, the light beam L12F emitted to the front detector 30 can properly be detected, so that the recording and reproducing property of the optical disk 100D can be stabilized by the small constitution. <P>COPYRIGHT: (C)2010,JPO&INPIT |
