| 摘要 |
PURPOSE:To obtain a single-sided video disc which can be operated continuously for a long time. CONSTITUTION:The single-sided video disc is provided, on one side thereof, with a video disc having pits and, on the other side thereof, with a disc having no pit. In the single-sided video disc, the weight and thickness on the video disc side are equal to those on the other side. This structure produces no read error even when a metal disc is employed. |
