| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording/reproducing device capable of adjusting an interlayer cross-talk amount, by which occurrence of the interlayer cross-talk can be made almost the same in both upper and lower layers in the direction of optical axis, as regards the three-dimensionally recordable/reproducible optical information recording/reproducing device. <P>SOLUTION: The device is equipped with a light source 20 for emitting a recording or a reproducing light, an objective lens 6 for converging the light emitted from the above light source 20 on a three dimensionally recordable/reproducible information recording medium 21, a photodetector 19 for detecting the light from the information recording medium 21, a pin hole 14 arranged in an optical path between the information recording medium 21 and the photodetector 19 to reduce the interlayer cross-talk of the information recording medium 21, and a balance correcting means 10 arranged in any one of optical paths from the light source 20 to the pin hole 14 to generate a spherical aberration, and then the balance of the interlayer cross-talk amount of the above information recording medium 21 is adjusted with respect to the direction of the optical axis. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
