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影碟机中的激光头是其中的主要部件,激光头是碟机中的信号拾取系统,它工作正常与否,直接影响影碟机的图像与声音质量以及影响到影碟机能否工作。激光头一般由激光器、光检测器、激光输出控制以及物镜,循迹和聚焦线圈、光学系统及光电转换系统组成,并通过扁平线与影碟机主板相连。目前影碟机多采用半导体激光器,具有体积小、重量轻、能量转换效率高、抗震强等优点。具代表性的是砷化镓激光器,而VCD机大多采
DVD player in the laser head is one of the main components, the laser pickup is the signal pickup system, it is working properly or not, directly affect the player’s image and sound quality and affect the player can work. The laser head is usually composed of a laser, a photodetector, a laser output control, an objective lens, a tracking and focusing coil, an optical system and a photoelectric conversion system, and is connected with the DVD player motherboard via a flat cable. At present, DVD players use semiconductor lasers, which have the advantages of small size, light weight, high energy conversion efficiency, strong earthquake resistance and the like. A typical gallium arsenide laser, and VCD machines mostly mining