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公开(公告)号：EP0577214A2
公开(公告)日：1994-01-05
申请号：EP93201881.5
申请日：1993-06-29
发明人： Bakx, Johannes Leopoldus , Weijenbergh, Paulus Gijsbertus Petrus , Belser, Karl Arnold , Jaquette, Glen Alan , Kulakowski, John Edward , McDowell, Judson Allen , Means, Rodney Jerome
CPC分类号： G11B27/3027 , G11B7/00745 , G11B11/10565 , G11B19/02 , G11B20/1258 , G11B21/083
摘要： A record carrier (1) comprises essentially circular tracks (20) concentrically located around a point of rotation (2). The record carrier (1) is divided into circular zones (4, 5, 6) comprising each m tracks (22), with m being an integer. Each track within a zone is subdivided into n sectors (8), with n being an integer which is constant per zone and which increases as the zone is more remote from the point of rotation (2). Each sector (8) comprises a header portion (9) and a data portion. The header portions (9) in radial direction in each zone are in line. In each zone the condition of m.n = l.k is satisfied, with l being an integer greater than or equal to 2 and being constant for each zone, and with k being an integer.
摘要翻译： 记录载体（1）包括基本上圆周的轨道（20），其围绕旋转点（2）同心地定位。 记录载体（1）被分成包括每个m个轨道（22）的圆形区域（4,5,6），其中m是整数。 区域内的每个轨道被细分为n个扇区（8），其中n是每个区域恒定的整数，并且随着区域距离旋转点更远（2）而增加。 每个扇区（8）包括报头部分（9）和数据部分。 每个区域中的头部部分（9）沿径向方向成直线。 在每个区域中，满足m.n = l.k的条件，其中l是大于或等于2的整数，并且对于每个区域是常数，并且k是整数。
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公开(公告)号：EP0480574A3
公开(公告)日：1993-04-14
申请号：EP91307968.7
申请日：1991-08-30
发明人： Belser, Karl Arnold
CPC分类号： G11B7/08505 , G11B7/00745 , G11B7/0901 , G11B7/094
摘要： An optical disk 10 has groups of features (such as depressed areas) arranged in a servo pattern disposed in a plurality of circumferentially spaced sectors, and with a flat, non-grooved surface inbetween. Each even sector 15b includes a plurality of features formed in an arrangement which is the complement and/or reversal in order circumferentially of their arrangement in the intervening odd sectors 15a. A single photodetector 36 senses the change in amplitude of reflected light as a spot from a laser passes over one of the features and generates position sensing signals corresponding to the pattern. At least three phases of the position sensing signal are generated for each sector. Each phase is determined by edges on the disk offset circumferentially with respect to each other and separated radially from each other by a critical distance. Errors caused by variations in pattern size and/or radial velocity of an optical head as it moves generally radially of the disk are reduced.
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公开(公告)号：EP0408310A3
公开(公告)日：1991-09-25
申请号：EP90307526.5
申请日：1990-07-10
发明人： Belser, Karl Arnold , Dounn, Paul Joseph , Henderson, Ian Edward , Kadlec, Ronald James , Roberts, Spencer Donald
IPC分类号： G11B7/085
CPC分类号： G05B19/232 , G05B2219/37313 , G05B2219/42209 , G11B7/08517 , G11B7/08529 , G11B7/08541 , G11B7/0941 , G11B21/085
摘要： A track-seeking system for an optical disk using a velocity control loop with partially-digitized velocity measurement is described in which the sample period of the position error signal is varied in accordance with a velocity profile and a gain of the digital circuits is adjusted, also in accordance with the velocity profile, for providing optimum operation of the digitized portion of the velocity signal generator. In another aspect of the velocity-signal generation, the same digital circuit generates a velocity reference signal and a velocity error signal from a common desired velocity profile set of values.
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公开(公告)号：EP0597656B1
公开(公告)日：1998-07-22
申请号：EP93308911.2
申请日：1993-11-08
CPC分类号： G11B7/0045 , G11B11/10506 , G11B11/1053 , G11B20/1426
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公开(公告)号：EP0577214A3
公开(公告)日：1994-07-27
申请号：EP93201881.5
申请日：1993-06-29
发明人： Bakx, Johannes Leopoldus , Weijenbergh, Paulus Gijsbertus Petrus , Belser, Karl Arnold , Jaquette, Glen Alan , Kulakowski, John Edward , McDowell, Judson Allen , Means, Rodney Jerome
CPC分类号： G11B27/3027 , G11B7/00745 , G11B11/10565 , G11B19/02 , G11B20/1258 , G11B21/083
摘要： A record carrier (1) comprises essentially circular tracks (20) concentrically located around a point of rotation (2). The record carrier (1) is divided into circular zones (4, 5, 6) comprising each m tracks (22), with m being an integer. Each track within a zone is subdivided into n sectors (8), with n being an integer which is constant per zone and which increases as the zone is more remote from the point of rotation (2). Each sector (8) comprises a header portion (9) and a data portion. The header portions (9) in radial direction in each zone are in line. In each zone the condition of m.n = l.k is satisfied, with l being an integer greater than or equal to 2 and being constant for each zone, and with k being an integer.
摘要翻译： 记录载体（1）包括基本上圆周的轨道（20），其围绕旋转点（2）同心地定位。 记录载体（1）被分成包括每个m个轨道（22）的圆形区域（4,5,6），其中m是整数。 区域内的每个轨道被细分为n个扇区（8），其中n是每个区域恒定的整数，并且随着该区域距离旋转点更远（2）而增加。 每个扇区（8）包括报头部分（9）和数据部分。 每个区域中的头部部分（9）沿径向方向成直线。 在每个区域中，满足m.n = l.k的条件，其中l是大于或等于2的整数，并且对于每个区域是常数，并且k是整数。
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公开(公告)号：EP0447081A1
公开(公告)日：1991-09-18
申请号：EP91301734.9
申请日：1991-03-01
CPC分类号： G11B5/5504 , G11B5/596 , G11B5/78 , G11B5/82 , G11B27/19
摘要： Storage capacity of a magnetic recording medium is increased by providing a nonconductive layer 11 over a magnetic layer 12 on which magnetic data 17 is writable in a series of recording tracks 17, and applying a pattern of electrostatic charges 21 to the nonconductive layer above at least one of the recording tracks 26 to write track-position-denoting servo information in overlying relation to magnetic data. The pattern may be applied by electrostatic charges selectively of negative or positive polarity that are imprinted while the medium is in a mold or advanced over an electro-photographic charge transfer drum, for thereby preprinting the pattern as a step in fabrication of the medium.
摘要翻译： 通过在磁性层12上提供非导电层11来增加磁记录介质的存储容量，磁性层12上可写入一系列记录轨道17中的磁性数据17，并且至少在上述非导电层上施加静电荷图案 记录轨道26之一，以与磁数据重叠的方式写入跟踪位置表示伺服信息。 该图案可以通过选择性地具有负极性或正极性的静电电荷施加，所述静电电荷在介质处于模具中时被压印，或者在电子照相电荷转移鼓上前进，从而将图案预先打印成介质的制造步骤。
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公开(公告)号：EP0408310B1
公开(公告)日：1996-01-17
申请号：EP90307526.5
申请日：1990-07-10
发明人： Belser, Karl Arnold , Dounn, Paul Joseph , Henderson, Ian Edward , Kadlec, Ronald James , Roberts, Spencer Donald
IPC分类号： G11B7/085
CPC分类号： G05B19/232 , G05B2219/37313 , G05B2219/42209 , G11B7/08517 , G11B7/08529 , G11B7/08541 , G11B7/0941 , G11B21/085
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公开(公告)号：EP0597656A2
公开(公告)日：1994-05-18
申请号：EP93308911.2
申请日：1993-11-08
CPC分类号： G11B7/0045 , G11B11/10506 , G11B11/1053 , G11B20/1426
摘要： An optical data storage system records pulse width modulated data as a series of contiguous and overlapping circular marks. A minimum number of circular marks are used to record the desired run length. Circular marks which overlap by greater or equal to one half the diameter of the circular mark are recorded using two different laser power levels. The result is that thermal buildup in the medium is kept to a minimum and the edge transitions are accurately positioned.
摘要翻译： 光学数据存储系统将脉冲宽度调制数据记录为一系列连续和重叠的圆形标记。 使用最少数量的圆形标记记录所需的运行长度。 使用两个不同的激光功率等级来记录重叠大于或等于圆形标记直径一半的圆形标记。 其结果是，介质中的热积聚被保持在最低限度，并且边缘过渡被准确定位。
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9.发明公开
公开(公告)号：EP0480574A2
公开(公告)日：1992-04-15
申请号：EP91307968.7
申请日：1991-08-30
发明人： Belser, Karl Arnold
CPC分类号： G11B7/08505 , G11B7/00745 , G11B7/0901 , G11B7/094
摘要： An optical disk 10 has groups of features (such as depressed areas) arranged in a servo pattern disposed in a plurality of circumferentially spaced sectors, and with a flat, non-grooved surface inbetween. Each even sector 15b includes a plurality of features formed in an arrangement which is the complement and/or reversal in order circumferentially of their arrangement in the intervening odd sectors 15a. A single photodetector 36 senses the change in amplitude of reflected light as a spot from a laser passes over one of the features and generates position sensing signals corresponding to the pattern. At least three phases of the position sensing signal are generated for each sector. Each phase is determined by edges on the disk offset circumferentially with respect to each other and separated radially from each other by a critical distance. Errors caused by variations in pattern size and/or radial velocity of an optical head as it moves generally radially of the disk are reduced.
摘要翻译： 光盘10具有以设置在多个周向间隔开的多个扇区中的伺服图案布置的特征组（例如凹陷区域），并且在其间具有平坦的非凹槽表面。 每个偶数扇形部分15b包括多个特征，它们以间隔排列的形式形成，该布置是在其间隔奇数扇形部分15a中沿其排列的圆周方向的互补和/或反转。 单个光电检测器36感测反射光的振幅的变化，因为来自激光的点通过特征之一并且产生对应于图案的位置感测信号。 为每个扇区生成位置感测信号的至少三个相位。 每个相位由磁盘上的边缘相对于彼此周向地偏移确定，并且彼此径向间隔一个临界距离。 由于光头大致径向移动时光学头的图案尺寸和/或径向速度的变化引起的错误减少。
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公开(公告)号：EP0339851A3
公开(公告)日：1989-12-20
申请号：EP89303820.8
申请日：1989-04-18
IPC分类号： G11B5/596
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/5965 , G11B5/743
摘要： A discrete track magnetic record disk is provided with a plurality of angularly spaced servo sectors (18), each sector being formed of a plurality of discrete blocks (32, 34, 36, 38) of magnetic material which are magnetically polarised in the disk's circumferential direction. These discrete servo blocks (32, 34, 36, 38) and the discrete magnetic tracks (20, 22, 24) are formed at the same time during the fabrication of the record disk so that each servo block is precisely and permanently radially aligned with an associated discrete data track. Following the fabrication of the disk, each of the servo blocks is exposed to the magnetic field generated by passing a direct current (DC) through a recording head. In this manner each of the servo blocks becomes magnetised in the circumferential direction and thereby presents two discrete magnetic transitions to a servo read head or a read/write head.
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