发明名称 Optical signal processing system with variable gain stage of servo system controlled by output of environmental condition sensor
摘要 A digital audio disc player is equipped with a tracking/focus servo mechanism which automatically controls the tracking and focusing of a light beam projected on a disc. The vibration of an automobile or other vehicle containing the player is detected so that, when there is a significant amount of vibration, the control sensitivity of the tracking/focus servo mechanism is increased to prevent the occurrence of tracking and focusing errors.
申请公布号 US4614863(A) 申请公布日期 1986.09.30
申请号 US19840650173 申请日期 1984.09.13
申请人 HITACHI, LTD. 发明人 SATO, TETSUO
分类号 G02B7/28;G11B7/09;(IPC1-7):G01J1/20 主分类号 G02B7/28
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