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公开(公告)号：US09280999B2
公开(公告)日：2016-03-08
申请号：US13863508
申请日：2013-04-16
申请人： Sony Corporation
发明人： Toshihisa Iriyama
IPC分类号： G11B7/0045 , G11B7/1263 , G11B7/24038 , G11B7/007 , G11B7/1267 , G11B7/00
CPC分类号： G11B7/00456 , G11B7/00736 , G11B7/1263 , G11B7/1267 , G11B7/24038 , G11B2007/0013
摘要： A recording apparatus includes a recording unit that performs a recording operation to each layer by performing laser light illumination to a recording medium which has (n+1) or more layers as a recording layer and in which a test writing area of each layer is formed between at least n consecutive layers and at a position in which the test writing areas are not overlapped with each other when seen from a laser light incident surface side, and a controller that sets the n consecutive layers to be a recording target layer in the recording operation including a test writing for laser power adjustment and causes the recording unit to execute the recording operation to the n recording target layers, wherein n≧2.
摘要翻译： 记录装置包括：记录单元，其通过对具有（n + 1）以上层的记录介质进行激光照射而对各层执行记录操作，并且其中形成每层的测试书写区域 在从激光入射面侧观察时，在至少n个连续层之间和在测试写入区域彼此不重叠的位置处的控制器以及在记录中将n个连续层设置为记录目标层的控制器 操作包括用于激光功率调节的测试写入，并使记录单元对n个记录目标层执行记录操作，其中n≥2。
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82.发明授权Current boost profile applied to laser during heat-assisted magnetic recording 有权在热辅助磁记录中应用于激光的电流增强曲线公开(公告)号：US09202506B1
公开(公告)日：2015-12-01
申请号：US14595740
申请日：2015-01-13
IPC分类号： G11B7/1263 , G11B5/31 , G11B5/48 , G11B5/60 , G11B5/00
CPC分类号： G11B7/1263 , G11B5/3133 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B2005/0021
摘要： A power level is applied to a laser that heats a heat-assisted recording medium is increased during recording for a plurality of iterations. Each iteration involves writing test data to a plurality of sequential tracks of the recording medium using the power level and determining bit error rates of the test data. Based on the bit error rates of the iterations, a power boost profile is determined. The power boost profile starts at a baseline level at a first track of a plurality of sequentially-written tracks, incrementally increases to a steady-state level over a first portion of the tracks, and remains at the steady-state level over subsequent ones of the tracks. The power boost profile is applied to the laser when recording to the recording medium.
摘要翻译： 对于在多次迭代的记录期间加热热辅助记录介质的激光器施加功率电平。 每次迭代涉及使用功率电平将测试数据写入记录介质的多个顺序轨道并确定测试数据的误码率。 基于迭代的误码率，确定功率提升曲线。 功率提升曲线在多个顺序写入的轨道的第一轨道处的基线水平处开始，在轨道的第一部分上递增地增加到稳态水平，并且在随后的轨迹中保持在稳态水平 轨道。 当记录到记录介质时，功率提升曲线被应用于激光器。
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公开(公告)号：US20150332726A1
公开(公告)日：2015-11-19
申请号：US14651286
申请日：2014-01-29
发明人： Kenya NAKAI , Masayuki OMAKI
IPC分类号： G11B7/24053 , G11B7/1263 , G11B7/24065
CPC分类号： G11B7/24053 , G11B7/0037 , G11B7/00454 , G11B7/1263 , G11B7/24065 , G11B2007/0006 , G11B2020/1292 , G11B2220/2541 , G11B2220/2595
摘要： An optical information recording medium has: a recording layer; a super-resolution functional layer; and a protective layer. Letting n be the refractive index of the protective layer with respect to a laser beam focused by a focusing optical system, λ, be the wavelength of the laser beam, and ds be the depth of recording marks, when the super-resolution functional layer is irradiated by the focused laser beam, it forms a focused light spot including central light that irradiates the recording marks and peripheral light that irradiates a region outside the central light. The optical information recording medium further satisfies either the condition that the central light has a positive phase difference with respect to the peripheral light and ds>λ/4n, or the condition that the central light has a negative phase difference with respect to the peripheral light and ds
摘要翻译： 光信息记录介质具有：记录层; 超分辨率功能层; 和保护层。 令n为相对于由聚焦光学系统聚焦的激光束的保护层的折射率，λ为激光束的波长，ds为记录标记的深度，当超分辨率功能层为 由聚焦激光束照射，形成聚焦光点，其包括照射记录标记的中心光和照射中心光外部的区域的周边光。 光信息记录介质还满足中心光相对于周围光具有正相位差和ds>λ/ 4n的条件，或者中心光相对于周边光具有负相位差的条件 和ds <λ/ 4n。
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公开(公告)号：US09153272B1
公开(公告)日：2015-10-06
申请号：US14278386
申请日：2014-05-15
发明人： Tim Rausch , Jon D. Trantham , John W. Dykes , Won Choul Yang
IPC分类号： G11B11/00 , G11B7/1267 , G11B5/012 , G11B7/1263 , G11B5/00
CPC分类号： G11B7/1267 , G11B5/012 , G11B5/314 , G11B5/455 , G11B5/6088 , G11B7/1263 , G11B2005/0021
摘要： At least one laser input current is applied to a laser in a heat assisted magnetic recording device. Laser output power of the laser is measured at the at least one applied laser current. A relationship is characterized amongst temperature, applied laser input current and laser output power. Laser current is set to an optimal laser current as determined at manufacturing. A metric of recording performance is measured to determine if the relationship is acceptable.
摘要翻译： 至少一个激光输入电流被施加到热辅助磁记录装置中的激光器。 在至少一个施加的激光电流下测量激光器的激光输出功率。 温度，施加的激光输入电流和激光输出功率之间的关系的特征。 激光电流设置为在制造时确定的最佳激光电流。 测量记录性能的度量以确定该关系是否可接受。
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公开(公告)号：US20150235665A1
公开(公告)日：2015-08-20
申请号：US14185424
申请日：2014-02-20
IPC分类号： G11B7/1263
CPC分类号： G11B13/08 , G11B5/09 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B7/1263 , G11B7/1267 , G11B2005/0021
摘要： A system may have a data storage medium that contains at least one data bit that is accessed by a transducing head that has a near-field transducer. A controller can be connected to the transducing head and store a plurality of near-field transducer operating currents in a memory. The controller may identify a change in efficiency of the near-field transducer from the plurality of near-field transducer operating currents.
摘要翻译： 系统可以具有包含由具有近场换能器的换能头访问的至少一个数据位的数据存储介质。 控制器可以连接到转换头并将多个近场换能器工作电流存储在存储器中。 控制器可以从多个近场换能器工作电流中识别近场换能器的效率变化。
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公开(公告)号：US09030922B2
公开(公告)日：2015-05-12
申请号：US12480944
申请日：2009-06-09
申请人： Chih-Ching Yu , Hung-Hsiang Chang , Ping-Tsai Tsai
发明人： Chih-Ching Yu , Hung-Hsiang Chang , Ping-Tsai Tsai
IPC分类号： G11B7/00 , G11B7/1263 , G11B7/1267
CPC分类号： G11B7/1263 , G11B7/1267
摘要： The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.
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公开(公告)号：US08953429B2
公开(公告)日：2015-02-10
申请号：US14219278
申请日：2014-03-19
发明人： Shinji Fujita
IPC分类号： G11B7/00 , G11B15/00 , G11B7/1263
CPC分类号： G11B7/1263 , G11B7/127
摘要： An optical disc device includes an optical pickup unit including a semiconductor laser that shines a laser light, a light-receiving unit that receives the return light of the laser light, a high-frequency generating circuit that generates high-frequency signals, a pickup driver that generates a drive signal that drives the semiconductor laser based on the high-frequency signal, a control unit that controls the high-frequency generating circuit such that, in states in which playback of the optical disc is halted while irradiation with the laser light is being performed, the signal level of the high-frequency signal to be superimposed is set at a first signal level other than zero so as to be smaller than in states in which the playback is performed.
摘要翻译： 光盘装置包括：包括照射激光的半导体激光器的光学拾取单元，接收激光的返回光的光接收单元，产生高频信号的高频发生电路;拾取驱动器 其基于高频信号产生驱动半导体激光器的驱动信号;控制单元，其控制高频发生电路，使得在用激光照射的情况下停止光盘的重放的状态为 要被重叠的高频信号的信号电平被设置在除了零之外的第一信号电平，以便小于在执行重放的状态。
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公开(公告)号：US08854939B2
公开(公告)日：2014-10-07
申请号：US14005386
申请日：2012-03-16
IPC分类号： G11B7/00 , G11B7/1263 , G11B7/1374 , G11B7/1387 , G11B7/09 , G11B7/139 , G11B7/1372
CPC分类号： G11B7/1263 , G11B7/0908 , G11B7/1374 , G11B7/1387 , G11B7/139 , G11B2007/13727
摘要： An optical disk apparatus has: a laser (14) that outputs light; an optical system that includes an SIL (2) for forming a predetermined sized beam spot on an optical disk (1) using the light from the laser; a detector (26) that detects output power of the laser and generates a laser power detection signal; a laser power control circuit (27) that controls the output power of the laser using the laser power detection signal; a detector (10) that detects a gap length between the optical disk and the SIL and generates a gap detection signal; and a gap control circuit (15) that controls the gap length between the optical disk and the SIL using the gap detection signal. The power control circuit has a gain crossover frequency greater than a gain crossover frequency of the gap control circuit.
摘要翻译： 光盘装置具有：输出光的激光器（14）; 光学系统，其包括用于使用来自激光器的光在光盘（1）上形成预定尺寸的光束点的SIL（2） 检测器（26），其检测激光器的输出功率并产生激光功率检测信号; 激光功率控制电路（27），其使用所述激光功率检测信号来控制所述激光器的输出功率; 检测器（10），其检测光盘和SIL之间的间隙长度，并产生间隙检测信号; 以及间隙控制电路（15），其使用间隙检测信号来控制光盘和SIL之间的间隙长度。 功率控制电路具有大于间隙控制电路的增益交叉频率的增益交叉频率。
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公开(公告)号：US20140293762A1
公开(公告)日：2014-10-02
申请号：US14219278
申请日：2014-03-19
发明人： Shinji FUJITA
IPC分类号： G11B7/1263
CPC分类号： G11B7/1263 , G11B7/127
摘要： An optical disc device includes an optical pickup unit including a semiconductor laser that shines a laser light, a light-receiving unit that receives the return light of the laser light, a high-frequency generating circuit that generates high-frequency signals, a pickup driver that generates a drive signal that drives the semiconductor laser based on the high-frequency signal, a control unit that controls the high-frequency generating circuit such that, in states in which playback of the optical disc is halted while irradiation with the laser light is being performed, the signal level of the high-frequency signal to be superimposed is set at a first signal level other than zero so as to be smaller than in states in which the playback is performed.
摘要翻译： 光盘装置包括：包括照射激光的半导体激光器的光学拾取单元，接收激光的返回光的光接收单元，产生高频信号的高频发生电路;拾取驱动器 其基于高频信号产生驱动半导体激光器的驱动信号;控制单元，其控制高频发生电路，使得在用激光照射的情况下停止光盘的重放的状态为 要被重叠的高频信号的信号电平被设置在除了零之外的第一信号电平，以便小于在执行重放的状态。
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公开(公告)号：US08659985B2
公开(公告)日：2014-02-25
申请号：US13398934
申请日：2012-02-17
申请人： Jun-ichi Asada , Kazuo Momoo , Yohichi Saitoh
发明人： Jun-ichi Asada , Kazuo Momoo , Yohichi Saitoh
IPC分类号： G11B7/1353 , G11B7/1263
CPC分类号： G11B7/00458 , G11B7/003 , G11B7/1353
摘要： In one embodiment of the present invention, an optical pickup for writing and reading data on an optical storage medium comprises a diffractive element for diffracting a light beam to split it into multiple light beams. The diffracted light beams includes a zero-order diffracted light beam for writing data on a track of the land or the groove of the optical storage medium and non-zero-order diffracted light beams for reading the data from the track. The diffractive element has first and second diffraction gratings that have mutually different grating vector directions and pitches. The first diffraction grating forms light beam spots on the same track by the non-zero-order and zero-order diffracted light beams. The second diffraction grating forms a light beam spot to extend to both sides of said track, or forms a light beam spot on one side of said track, by the non-zero-order diffracted light beams.
摘要翻译： 在本发明的一个实施例中，用于在光学存储介质上写入和读取数据的光学拾取器包括用于衍射光束以将其分成多个光束的衍射元件。 衍射光束包括用于在光存储介质的焊盘或凹槽的轨道上写入数据的零级衍射光束和用于从轨道读取数据的非零级衍射光束。 衍射元件具有第一和第二衍射光栅，其具有相互不同的光栅矢量方向和间距。 第一衍射光栅通过非零级和零级衍射光束在同一轨道上形成光束点。 第二衍射光栅形成光束点，以延伸到所述轨道的两侧，或者通过非零级衍射光束在所述轨道的一侧上形成光束点。
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