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1.发明授权
公开(公告)号：EP0452028B1
公开(公告)日：1995-06-14
申请号：EP91302912.0
申请日：1991-04-03
CPC分类号： G11B7/1353 , G11B7/09 , G11B7/1381
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2.发明公开Optical head with improved tracking and focusing error control means 失效Optischer Kopf mit verbicultem Spur- und Fokusfehlerregelkreis。
公开(公告)号：EP0452028A2
公开(公告)日：1991-10-16
申请号：EP91302912.0
申请日：1991-04-03
CPC分类号： G11B7/1353 , G11B7/09 , G11B7/1381
摘要： An optical head for reading and/or writing information from and in an optical recording medium having an improved sensor structure for focusing and tracking error detections. A light beam is separated into a 0th-order diffraction light beam and ±1st-order diffraction light beams, and these light beams are impinged upon a recording track of the optical recording medium (3). The light beams reflected from the optical recording medium is separated into two different directions (12,13), and the tracking and focusing error detections are carried out with multi-segment optical sensors (14,15) which are connected in a complementary manner. As a result, the influence of the tracking error on the focusing error detection is eliminated, and the linearity of the focusing error detection is improved.
摘要翻译： 一种用于从具有用于聚焦和跟踪误差检测的改进的传感器结构的光学记录介质中和其中读取和/或写入信息的光学头。 将光束分离成0级衍射光束和+/- 1级衍射光束，并且这些光束照射在光学记录介质的记录轨道上。 从光记录介质反射的光束被分离成两个不同的方向，并且以互补方式连接的多段光学传感器执行跟踪和聚焦误差检测。 结果，消除了跟踪误差对聚焦误差检测的影响，提高了聚焦误差检测的线性。
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公开(公告)号：EP0452028A3
公开(公告)日：1992-05-06
申请号：EP91302912.0
申请日：1991-04-03
CPC分类号： G11B7/1353 , G11B7/09 , G11B7/1381
摘要： An optical head for reading and/or writing information from and in an optical recording medium having an improved sensor structure for focusing and tracking error detections. A light beam is separated into a 0th-order diffraction light beam and ±1st-order diffraction light beams, and these light beams are impinged upon a recording track of the optical recording medium (3). The light beams reflected from the optical recording medium is separated into two different directions (12,13), and the tracking and focusing error detections are carried out with multi-segment optical sensors (14,15) which are connected in a complementary manner. As a result, the influence of the tracking error on the focusing error detection is eliminated, and the linearity of the focusing error detection is improved.
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