分析了光盘信号探测、聚焦、循迹原理。
The principles of the signals detecting, focusing and tracking of the optical disk are analyzed.
更多内容请点击：Budurl--网址更短，循迹功能更先进。
Read more: Budurl - Url Shortener With Advanced Tracking Features.
循迹伺服对于DVD播放器稳定准确从光盘上读出起着重要作用。
Tracking Servo plays a great role in DVD player reading data from the optical discs steady and accurately.
如上图所示的运输网络，依赖RFID卡循迹于公共汽车、地铁和小车上的乘客。
The transportation network, above, relies on RFID cards to track commuters in busses, subways and cars.
研究光学拾取头的基本原理和光盘信号拾取原理，简要分析了实际的光学头聚焦伺服和循迹伺服的机械结构。
Studying the theory of optical pickup head unit (OPU) and how to pickup the signal on the disk. Based on these theories, it analyse the structure of the focusing and tracking device.
计算结果表明：旋转误差使三光束法循迹信号的幅值近似呈周期性变化，它是在生产过程中需要严格控制的参数以保证循迹信号的幅值最大化；
The rotation angle approximately periodically changes the sub-beam signal amplitude and should be strictly controlled in the assembly to maximize the tracking signal amplitude.
计算结果表明：旋转误差使三光束法循迹信号的幅值近似呈周期性变化，它是在生产过程中需要严格控制的参数以保证循迹信号的幅值最大化；
The rotation angle approximately periodically changes the sub-beam signal amplitude and should be strictly controlled in the assembly to maximize the tracking signal amplitude.
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