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CD 唱机、LD、VCD、SVCD、DVD 影碟机及电脑光驱等都带有激光头,维修时怎样检测激光头的好坏呢?不少人因用肉眼直接观察激光头而致使眼睛灼伤。本文介绍的激光头检测器能方便、准确、快捷、安全地进行判断、检测,其判断只需用耳朵听即可。电路如附图所示。一般激光头发出的光束中包含近红外光,故电路中采用了光强——频率转换传感器 IC(TSL245),它将被检测到的激
CD player, LD, VCD, SVCD, DVD player and computer CD-ROM, etc. are equipped with a laser head, how to detect the laser head repair is good or bad? Many people use the naked eye to directly observe the laser head and cause eye burns. This article describes the laser head detector can be convenient, accurate, fast and safe to judge, test, the judge just need to listen to the ear can be. Circuit shown in the figure. General laser hair out of the beam contains near-infrared light, so the circuit uses light intensity - frequency conversion sensor IC (TSL245), it will be detected by the excitement