五、光学组件 光学组件的主要功能是利用激光束拾取作为坑点记录在视盘上的视音频信号和把它们转换成电信号。光学组件在视盘旋转时在从内到外轨迹的径向方向移动来拾取信息。它的其它功能是:(1)拾取,拾取信息;(2)循迹,恒定地跟随视盘上坑点的螺旋轨迹;(3)聚焦,将激光束聚焦在视盘上;(4)滑动,从内圈到外圈移动光 Fifth, the optical components The main function of optical components is to use the laser beam picked up as pit recorded on the video disk audio and video signals and convert them into electrical signals. The optical component picks up the information as it moves in the radial direction of the track from the inside to the outside as the disc rotates. Its other functions are: (1) picking up and picking up information; (2) tracking, which constantly follows the helical trajectory of the pit on the video disk; (3) focusing to focus the laser beam on the video disk; (4) Inner ring to the outer ring to move light