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近年来,国外出现了一种电视唱片,只要通过专用的放象机,就可以在普通电视机的屏幕上看到节目.就象声唱片通过电唱机、扩音器能听到事先灌注在唱片上的声音一样. 在玻璃圆盘的表面涂上一层极薄的金属膜,录刻上彩色电视节目的信息,就成了一张原版的电视唱片. 电视唱片系统大致如图1所示.录刻时,先将要记录的图象信息(包括颜色和声音信息)转换成电信号,并用此信号控制调制器,使通过调制器的激光“时有”“时无”,这束激光经显微物镜聚焦在旋转盘上的金属膜层上,使金属熔化,随物镜的径向移动而形成螺旋
In recent years, there has been a foreign record of television recordings that can be viewed on the screen of regular televisions by using a dedicated player, just like an audio disc recorded on a record by a record player or a megaphone The same sound on the glass disc surface coated with a thin layer of metal film, record the color TV shows on the information, it became a original TV record .TV recording system roughly as shown in Figure 1. Recorded When engraved, the image information to be recorded (including color and sound information) is first converted into an electric signal and the modulator is controlled by this signal so that the laser light passing through the modulator The objective lens is focused on the metal film layer on the rotating disk to melt the metal and form a spiral with the radial movement of the objective lens