公开(公告)号：US20110199877A1

公开(公告)日：2011-08-18

申请号：US13094220

申请日：2011-04-26

申请人： Atsushi NAKAMURA ,  Naoyasu Miyagawa

发明人： Atsushi NAKAMURA ,  Naoyasu Miyagawa

IPC分类号： G11B7/004 ,  G11B7/24

CPC分类号： G11B7/126 ,  G11B7/00456 ,  G11B7/0062

摘要： There is provided an optical recording method for directing a recording pulse train to an optical disc medium to form marks thereon and for recording information as information about the edge positions of said marks and the spaces between marks, the recording pulse train having been created by modulating laser light into plural power levels. The method includes: coding to-be-recorded data into coded data consisting of the combination of marks and spaces; classifying said marks within said coded data on the basis of the mark length and the preceding or succeeding space lengths of the marks; shifting the position of the second pulse edge counted from the end portion of the recording pulse train for forming said marks, depending on the result of said classification, to adjust said recording pulse train; and directing said recording pulse train to the optical disc medium to form said marks thereon.

公开(公告)号：US08000177B2

公开(公告)日：2011-08-16

申请号：US12303832

申请日：2007-05-31

申请人： Atsushi Nakamura ,  Naoyasu Miyagawa

发明人： Atsushi Nakamura ,  Naoyasu Miyagawa

IPC分类号： G11B11/00

CPC分类号： G11B7/005 ,  G11B7/1267 ,  G11B19/04 ,  G11B19/28

摘要： A reading devices suppresses deterioration of the recording marks caused by increasing the output laser power to compensate for a drop in the S/N ratio when reading at a high speed information recorded to a high density recording medium. To read information recorded to an optical data recording medium that is written and read using a laser beam output from a semiconductor laser, the reading method modulates a high frequency current on the drive current of the semiconductor laser to output the laser beam, and changes the light modulation rate according to the selected linear velocity used for reading. The light modulation rate is the ratio Pp/Pave between the peak power Pp and the average read power Pave of the light intensity of the high frequency modulated laser beam.

摘要翻译： 读取装置抑制由于增加输出激光功率而导致的记录标记的劣化，以补偿在记录到高密度记录介质的高速信息下读取时的S / N比的下降。 为了读取记录到使用从半导体激光器输出的激光束进行写入和读取的光学数据记录介质的信息，该读取方法调制高频电流对半导体激光器的驱动电流的输出，并输出激光束 根据用于读取的所选线速度的光调制率。 光调制率是峰值功率Pp与高频调制激光束的光强度的平均读取功率Pave之比Pp / Pave。

公开(公告)号：USRE41928E1

公开(公告)日：2010-11-16

申请号：US09420603

申请日：1999-10-19

申请人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

发明人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

IPC分类号： G09B19/017 ,  G09B23/033 ,  G09B23/088 ,  G09B7/042 ,  G09B7/043

CPC分类号： G11B7/085 ,  G11B7/0037 ,  G11B7/08505 ,  G11B7/12 ,  G11B7/124 ,  G11B7/1245 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B23/0302 ,  G11B23/30 ,  G11B2007/0006

摘要： An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one or a plurality of optical heads having a plurality of objective lenses whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses, a cartridge for enclosing the optical disc, a discrimination hole which is formed on the cartridge, and a sensor for detecting the opening/closing state of the discrimination hole and for generating a discrimination signal. In accordance with the result of the discrimination as to the thickness of the loaded optical disc, the objective lens, in which the occurrence of the aberration is smallest, is used, so that the information signal can preferably be recorded, reproduced or erased onto/from the optical discs having different substrate thicknesses. Instead of an optical head having objective lenses, an optical head having a waveguide and a plurality of converging grating couplers whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses is provided to achieve the same object. An optical recording/reproducing apparatus for recording, reproducing or erasing an information signal onto/from an optical disc having at least a transparent substrate and an information layer by converging a light flux on the information layer through the transparent substrate. The apparatus includes optical converging devices, with different numerical apertures, focal distances or working distances, such as objective lenses or grating lenses, for performing aberration correction over a plurality of transparent substrates of different thicknesses of optical discs and a device for discriminating the type of optical disc based on the thicknesses of the transparent substrates. One of the optical converging devices that generates the least aberration is used according to a result of the discrimination of the thickness of the optical disk loaded in the apparatus to cause the information signal to be suitably recorded, reproduced or erased onto/from the optical discs having the different substrate thicknesses.

公开(公告)号：US07830779B2

公开(公告)日：2010-11-09

申请号：US10947255

申请日：2004-09-23

申请人： Katsuyuki Takahashi ,  Kenichi Nishiuchi ,  Naoyasu Miyagawa ,  Takashi Nishihara

发明人： Katsuyuki Takahashi ,  Kenichi Nishiuchi ,  Naoyasu Miyagawa ,  Takashi Nishihara

IPC分类号： G11B7/24

CPC分类号： G11B7/00454 ,  G11B7/00736 ,  G11B7/2403 ,  G11B7/24038 ,  G11B7/24094 ,  G11B7/268 ,  G11B2007/0013

摘要： Because conditions for recording identification data of a medium vary in accordance with the structure of different media, such as a single-layer or a multiple-layer structure, stable data recording has been a difficult task. To solve this problem, an incident side of the laser beam for recording identification data on a single-layer optical disk 5 and a double-layer optical disk 6 is the opposite side of a substrate 1 upon which user data is recorded. From this structure, even in a double-layer optical disk 6, the recording is not affected by the recording layer of a second layer 12b and the like. Therefore, in the double-layer optical disk 6, identification data of the medium can be recorded under the same conditions as the single-layer optical disk 5.

摘要翻译： 由于用于记录介质的识别数据的条件根据诸如单层或多层结构的不同介质的结构而变化，因此稳定的数据记录是一项艰巨的任务。 为了解决这个问题，用于在单层光盘5和双层光盘6上记录识别数据的激光束的入射侧是记录用户数据的基板1的相反侧。 根据该结构，即使在双层光盘6中，记录也不受第二层12b等的记录层的影响。 因此，在双层光盘6中，可以在与单层光盘5相同的条件下记录介质的识别数据。

公开(公告)号：US07636295B2

公开(公告)日：2009-12-22

申请号：US10564953

申请日：2005-05-16

申请人： Tomiharu Hosaka ,  Hideo Kusada ,  Naoyasu Miyagawa

发明人： Tomiharu Hosaka ,  Hideo Kusada ,  Naoyasu Miyagawa

IPC分类号： G11B7/24

CPC分类号： G11B7/243 ,  G11B7/00718 ,  G11B7/24079 ,  G11B7/268

摘要： It is an object to provide an optical information recording medium for land/groove recording, capable of recording at a plurality of linear speeds, wherein deterioration of jitter of the reproduction signal is prevented in recording and reproduction at low linear speeds. To this end, there is provided an optical information recording medium having a land/groove structure and being capable of recording at a plurality of linear speeds, wherein the ratio of the maximum recordable linear speed to the minimum recordable linear speed has a value of 2 to 3, and the ratio of the amount of light reflected from a groove in an unrecorded state to the amount of light reflected from a land in an unrecorded state has a value of at least 1.08 and no more than 1.19.

摘要翻译： 本发明的目的是提供一种用于陆地/凹槽记录的光学信息记录介质，其能够以多个线速度进行记录，其中在低线速度下防止再现信号的抖动恶化。 为此，提供了一种光盘信息记录介质，具有平台/凹槽结构并且能够以多个线速度进行记录，其中最大可记录线速度与最小可记录线速度的比值为2 至3，并且从未记录状态的沟槽反射的光量与从未记录状态的焊盘反射的光量的比值至少为1.08且不大于1.19。

公开(公告)号：USRE40229E1

公开(公告)日：2008-04-08

申请号：US09460222

申请日：1999-12-13

申请人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

发明人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

IPC分类号： G11B7/00

CPC分类号： G11B7/085 ,  G11B7/0037 ,  G11B7/08505 ,  G11B7/12 ,  G11B7/124 ,  G11B7/1245 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B23/0302 ,  G11B23/30 ,  G11B2007/0006

摘要： An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one or a plurality of optical heads having a plurality of objective lenses whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses, a cartridge for enclosing the optical disc, a discrimination hole which is formed on the cartridge, and a sensor for detecting the opening/closing state of the discrimination hole and for generating a discrimination signal. In accordance with the result of the discrimination as to the thickness of the loaded optical disc, the objective lens, in which the occurrence of the aberration is smallest, is used, so that the information signal can preferably be recorded, reproduced or erased onto/from the optical discs having different substrate thicknesses. Instead of an optical head having objective lenses, an optical head having a waveguide and a plurality of converging grating couplers whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses is provided to achieve the same object. An optical recording/reproducing apparatus for recording, reproducing or erasing an information signal onto/from an optical disc having at least a transparent substrate and an information layer by converging a light flux on the information layer through the transparent substrate. The apparatus includes optical converging devices, with different numerical apertures, focal distances or working distances, such as objective lenses or grating lenses, for performing aberration correction over a plurality of transparent substrates of different thicknesses of optical discs and a device for discriminating the type of optical disc based on the thicknesses of the transparent substrates. One of the optical converging devices that generates the least aberration is used according to a result of the discrimination of the thickness of the optical disk loaded in the apparatus to cause the information signal to be suitably recorded, reproduced or erased onto/from the optical discs having the different substrate thicknesses.

公开(公告)号：USRE40017E1

公开(公告)日：2008-01-22

申请号：US10693810

申请日：2003-10-23

申请人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

发明人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

IPC分类号： G11B7/11

CPC分类号： G11B7/085 ,  G11B7/0037 ,  G11B7/08505 ,  G11B7/12 ,  G11B7/124 ,  G11B7/1245 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B23/0302 ,  G11B23/30 ,  G11B2007/0006

摘要： An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one or a plurality of optical heads having a plurality of objective lenses whose aberations have respectivley been corrected for a plurality of disc substrates of different thicknesses, a cartridge for enclosing the optical disc, a discrimination hole which is formed on the cartridge, and a sensor for detecting the opening/ closing state of the discrimination hole and for generating a discrimination signal. In accordance with the result of the discrimination as to the thickness of the loaded optical disc, the objective lens, in which the occurrence of the aberration is smallest, is used, so that the information signal can preferably be recorded, reproduced or erased onto/from the optical discs having different substrate thicknesses. Instead of an optical head having objective lenses, an optical head having a waveguide and a plurality of converging grating couplers whose aberrations have respectively been corrected for a plurality of converging grating couplers whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses is provided to achieve the same object. An optical recording/reproducing apparatus for recording, reproducing or erasing an information signal onto/from an optical disc having at least a transparent substrate and an information layer by converging a light flux on the information layer through the transparent substrate. The apparatus includes optical converging devices, with different numerical apertures, focal distances or working distances, such as objective lenses or grating lenses, for performing aberration correction over a plurality of transparent substrates of different thicknesses of optical discs and a device for discriminating the type of optical disc based on the thicknesses of the transparent substrates. One of the optical converging devices that generates the least aberration is used according to a result of the discrimination of the thickness of the optical disk loaded in the apparatus to cause the information signal to be suitably recorded, reproduced or erased onto/from the optical discs having the different substrate thicknesses.

公开(公告)号：US07142496B2

公开(公告)日：2006-11-28

申请号：US10263603

申请日：2002-10-02

申请人： Naoyasu Miyagawa ,  Kenichi Nishiuchi

发明人： Naoyasu Miyagawa ,  Kenichi Nishiuchi

IPC分类号： G11B7/0045

CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/00454 ,  G11B7/007 ,  G11B2007/0013

摘要： A plurality of types of recording pulse control rules for which the recording pulse waveform is determined according to the information signals to be recorded are stored in advance in an optical disk. When recording to the optical disk, information is recorded using a recording pulse where, due to the focused laser beam, the temperature in the recording layer cools more rapidly at a second information recording layer closer to the side where light is incident than at a first information recording layer farther away from the side where light is incident.

摘要翻译： 根据要记录的信息信号确定记录脉冲波形的多种类型的记录脉冲控制规则被预先存储在光盘中。 当记录到光盘时，使用记录脉冲记录信息，其中由于聚焦的激光束，记录层中的温度在更靠近光入射的一侧的第二信息记录层处比在第一 信息记录层远离光入射的一侧。

公开(公告)号：US20060182010A1

公开(公告)日：2006-08-17

申请号：US10564953

申请日：2005-05-16

申请人： Tomiharu Hosaka ,  Hideo Kusada ,  Naoyasu Miyagawa

发明人： Tomiharu Hosaka ,  Hideo Kusada ,  Naoyasu Miyagawa

IPC分类号： G11B7/24

CPC分类号： G11B7/243 ,  G11B7/00718 ,  G11B7/24079 ,  G11B7/268

摘要： It is an object to provide an optical information recording medium for land/groove recording, capable of recording at a plurality of linear speeds, wherein deterioration of jitter of the reproduction signal is prevented in recording and reproduction at low linear speeds. To this end, there is provided an optical information recording medium having a land/groove structure and being capable of recording at a plurality of linear speeds, wherein the ratio (SH/SL) of the maximum recordable linear speed (SH) to the minimum recordable linear speed (SL) has a value of 2 to 3, and the ratio (RG/RL) of the amount of light reflected from a groove (RG) in an unrecorded state to the amount of light reflected from a land (RL) in an unrecorded state has a value of at least 1.08 and no more than 1.19.

摘要翻译： 本发明的目的是提供一种用于陆地/凹槽记录的光学信息记录介质，其能够以多个线速度进行记录，其中在低线速度下防止再现信号的抖动恶化。 为此，提供了一种光盘信息记录介质，具有焊盘/凹槽结构，并且能够以多个线速度进行记录，其中最大可记录线速度（SH）与最小可记录线速度（SH）的比（SH / SL） 可记录线速度（SL）的值为2〜3，从未记录状态的槽（RG）反射的光量与从陆地（RL）反射的光量的比例（RG / RL） 未记录状态的值至少为1.08且不超过1.19。

公开(公告)号：US06975579B2

公开(公告)日：2005-12-13

申请号：US10702750

申请日：2003-11-06

申请人： Kenichi Nishiuchi ,  Naoyasu Miyagawa ,  Eiji Ohno ,  Nobuo Akahira

发明人： Kenichi Nishiuchi ,  Naoyasu Miyagawa ,  Eiji Ohno ,  Nobuo Akahira

IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B11/105 ,  G11B7/24

CPC分类号： G11B11/10595 ,  G11B7/0045 ,  G11B7/00456 ,  G11B7/005 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00736 ,  G11B7/08505 ,  G11B7/08511 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/126 ,  G11B7/1267

摘要： An optical information recording and reproducing apparatus for recording and reproducing an information signal on/from both concave portions and convex portions of guide grooves formed on a recording medium is disclosed. The optical information recording and reproducing apparatus includes: an optical portion for focusing a light beam emitted from a light source on the recording medium; a focusing control portion for controlling a focal point of the light beam; a tracking control portion for controlling the position of the light beam; a selection portion for selecting which of the concave portions and the convex portions of the guide grooves are used for recording or reproducing; a polarity inverting portion for inverting the polarity of an output signal from the tracking control portion depending on a result selected by the selection portion; a waveform setting portion for setting a modulation pattern for the light; and a signal reproduction portion for demodulating the information signal from a light reflected or transmitted by recorded marks recorded on the recording medium; wherein at least one of the focusing control portion, the tracking control portion, the waveform setting portion and the signal reproduction portion has at least two kinds of operation conditions for recording and reproducing the information signal on/from the concave portions and the convex portions of the guide grooves, and wherein the operation conditions are selected depending on the result selected by the selection portion.

摘要翻译： 公开了一种用于在形成在记录介质上的引导槽的凹部和凸部上记录和再现信息信号的光学信息记录和再现装置。 光信息记录和再现装置包括：用于将从光源发射的光束聚焦在记录介质上的光学部分; 用于控制光束的焦点的聚焦控制部分; 跟踪控制部分，用于控制光束的位置; 用于选择引导槽的哪个凹部和凸部用于记录或再现的选择部分; 极性反转部分，用于根据由选择部分选择的结果来反转来自跟踪控制部分的输出信号的极性; 用于设置光的调制图案的波形设置部分; 以及信号再现部分，用于从记录在记录介质上的记录标记反射或发射的光解调信息信号; 其中聚焦控制部分，跟踪控制部分，波形设置部分和信号再现部分中的至少一个具有至少两种操作条件，用于在凹部和凸部的凹部和凸部之间记录和再现信息信号 引导凹槽，并且其中根据由选择部分选择的结果选择操作条件。