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光盘的离线检测是盘片质量控制的重要环节,判断来自于生产线上的被测盘片是否符合标准,离线检测包括光学、机械检测和电信号检测,本节首先介绍光学和机械检测。虽然光盘复制生产线上配置了在线检测系统,但离线测试设备仍然是必须的,下面给出两个必要的理由。首先,离线测试确保生产出的盘片符合相应的Philips／Sony 标准或者DVD标准。这些标准设计的目的是确保盘片和驱动器兼容。在生产许可条款下,如果生产者生产出来的盘片不满足标准中所要求的必须具备的规范,则不能在盘片上打出CD或 DVD的通用标识。此外盘片可能无法在所有播放机中播放,即使能播放也会产生错误。
CD-ROM off-line testing is an important part of the quality control of the disc to determine whether the measured disc from the production line meets the standard, offline testing including optical, mechanical testing and electrical signal detection, this section first introduces the optical and mechanical testing. Although an online test system is provided on the CD duplication line, off-line test equipment is still a must. Two reasons are given below. First off-line testing ensures the platters produced are in compliance with the appropriate Philips / Sony or DVD standards. The purpose of these standard designs is to ensure that the disc and drive are compatible. Under the terms of the production license, a generic label for a CD or DVD can not be typed on a disc if the disc produced by the producer does not meet the required specifications required by the standard. In addition, the platters may not play on all players and errors may occur even when played back.