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    • 7. 发明授权
    • Disk discrimination method and device
    • 磁盘鉴别方法及装置
    • US06111832A
    • 2000-08-29
    • US961099
    • 1997-10-30
    • Shigeo TsuchiyaTatsuro ShimizuHiroshi Nakane
    • Shigeo TsuchiyaTatsuro ShimizuHiroshi Nakane
    • G11B7/00G11B7/004G11B7/085G11B7/09G11B7/135G11B19/12
    • G11B7/1372G11B19/125G11B7/085G11B7/08511G11B7/0945G11B7/126G11B2007/0006G11B2007/0013G11B7/0925G11B7/0943
    • An optical disk has a reflecting layer and a transparent substrate formed on the reflecting layer. The type of the optical disk changes depending on the physical characteristics of the reflecting layer and the thickness of the transparent substrate. When discriminating such a disk, an objective lens which focuses an optical beam on the disk is moved toward the disk. Along with this movement, a detection signal that detects an optical beam reflected by the disk generates a detection signal. First, a peak accompanying mirror surface reflection of the surface of the disk appears, and then a peak accompanying reflection of the reflecting layer appears. The type of the disk which concerns the transparent substrate of the optical disk is discriminated from the time interval between the two peaks. The characteristics and reflection level of the RF component of detection signal generated by the detector change in accordance with the count of reflecting layers and the reflectance of the reflecting layer(s). This discriminates the physical characteristics of the reflecting surface and the type of the optical disk. In this manner, with the disk type discrimination method and device according to the present invention, discrimination can be performed within a substantially constant, short period of time after the disk is set in the device until the disk is recognized.
    • 光盘具有形成在反射层上的反射层和透明基板。 光盘的类型根据反射层的物理特性和透明基板的厚度而变化。 当识别这样的盘时,将光束聚焦在盘上的物镜朝向盘移动。 随着这种移动,检测由盘反射的光束的检测信号产生检测信号。 首先,出现伴随镜面表面反射的峰的峰值,然后出现伴随反射层反射的峰。 与两个峰值之间的时间间隔区分与光盘的透明基板相关的盘的类型。 由检测器产生的检测信号的RF分量的特性和反射水平根据反射层的数量和反射层的反射率而变化。 这鉴别出反射面的物理特性和光盘的种类。 以这种方式,利用根据本发明的盘类型识别方法和装置,可以在将盘设置在装置中之后的基本上恒定的短时间内进行判别,直到盘被识别为止。