| 摘要 |
PROBLEM TO BE SOLVED: To suppress the noise signal by irregular reflection from an optical disk by a shield having a hole perforated to the smallest possible diameter necessary for recording and reproducing of sounds/videos. SOLUTION: The outer side of an objective lens is provided with the perforated shield which has the hole perforated to the smallest possible diameter necessary for recording and reproducing of the digital sounds/videos signal and is screwed to the casing of the optical pickup or is integrated with the casing in order to suppress the noise signal by the irregular reflection of a laser beam from the optical disk. COPYRIGHT: (C)2005,JPO&NCIPI
|
