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公开(公告)号：US20090028035A1
公开(公告)日：2009-01-29
申请号：US11912469
申请日：2006-04-24
申请人： Kousei Sano , Yoshiaki Komma , Shin-ichi Kadowaki
发明人： Kousei Sano , Yoshiaki Komma , Shin-ichi Kadowaki
IPC分类号： G11B7/135
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/1353 , G11B2007/0013
摘要： An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second interfering portion transmitting a second main region; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam.
摘要翻译： 根据本发明的光学头装置包括用于分离已经从光学存储介质反射的光束的分离部分。 分割部分包括：传送第一干扰部分的第一主区域; 传送第二主区域的第二干扰部分; 第一和第二子区域以比在第一主区域中低的速率传输第一干扰部分，并且第二干扰部分以比在第二主要区域中更低的速率透过。 所述分割部将所述反射光束分割为：透过所述第一主区域的第一主光束; 透过第二主区域的第二主光束; 透射通过第一子区域的第一子光束; 和通过第二子区域传输的第二副光束。 分割部还包括用于将第一子光束的一部分与第二子光束的一部分交换的交换部分。
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2.发明授权Optical pick-up head, optical information apparatus, and optical information reproducing method 有权光学拾取头，光学信息装置和光学信息再现方法公开(公告)号：US07460448B2
公开(公告)日：2008-12-02
申请号：US11789106
申请日：2007-04-23
申请人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
发明人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.
摘要翻译： 本发明的光信息装置包括：光拾取头，包括：光源; 衍射单位; 冷凝单元; 分束器; 光检测器; 和跟踪误差信号发生器。 光记录介质具有基本上以恒定间距布置的轨道。 平均音高是tp。 当主光束被放置在轨道上时，第一子光束和第二子光束被放置在轨道之间。 跟踪误差信号发生器对从接收主波束的光接收部分输出的信号执行差分运算，产生第一推挽信号，对从光接收部分输出的信号执行差分运算 接收第一子光束和第二子光束以产生第二推挽信号，并且相对于第一推挽信号和第二推挽信号执行差分算术运算以产生跟踪误差信号， 当在与光记录介质的轨道正交的方向上扫描光束时，以间距tp获得的第一推挽信号的幅度波动的情况。
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公开(公告)号：US07420897B2
公开(公告)日：2008-09-02
申请号：US11176207
申请日：2005-07-08
IPC分类号： G11B7/00
CPC分类号： G11B7/0956 , G11B7/131 , G11B7/133
摘要： A light sensing area of a light sensing element is comprised of A1 region, A2 region, B1 region, B2 region and N region. A tilt detector carries out a tilt detection in accordance with a first difference signal, which is a difference signal between a signal obtained from the A1 region and a signal obtained from the B1 region, and a second difference signal, which is difference signal between a signal obtained from the A2 region and a signal obtained from the B2 region.Accordingly, an optical-disk tilt detecting signal having a little influence of defocusing can be obtained even at boundaries between recorded information tracks and non-recorded information tracks.
摘要翻译： 感光元件的感光区域由A 1区域，A 2区域，B 1区域，B 2区域和N区域构成。 倾斜检测器根据作为从A 1区域获得的信号与从B 1区域获得的信号之间的差分信号的第一差分信号和作为差分信号的第二差分信号执行倾斜检测 在从A 2区域获得的信号和从B 2区域获得的信号之间。 因此，即使在记录的信息轨道和未记录的信息轨迹之间的边界，也可以获得具有散焦影响很小的光盘倾斜检测信号。
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4.发明授权公开(公告)号：US06967916B2
公开(公告)日：2005-11-22
申请号：US09975396
申请日：2001-10-10
申请人： Kousei Sano , Shin-ichi Kadowaki , Yoshiaki Komma , Seiji Nishino , Katsuhiko Yasuda , Akihiro Yasuda
发明人： Kousei Sano , Shin-ichi Kadowaki , Yoshiaki Komma , Seiji Nishino , Katsuhiko Yasuda , Akihiro Yasuda
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0908 , G11B7/0909 , G11B7/131 , G11B7/1378 , G11B7/13927
摘要： An optical head apparatus capable of stably obtaining a detection signal of spherical aberration even with a high density optical disk. A spherical aberration error signal is obtained by: dividing the returning light from the optical disk into a transmitted light and a diffracted light; reproducing information with the transmitted light having a larger amount of light while dividing the diffracted light having a small amount of light into two regions, i.e., region near the optical axis and a region distant from the optical axis; determining amounts of focus deviation in respective regions as focus error signals; and taking the difference signal therebetween. Thus, it is possible to detect the amount of spherical aberration with the SN ratio of the information reproducing signal kept at high level.
摘要翻译： 即使使用高密度光盘也能够稳定地获得球面像差的检测信号的光学头装置。 通过以下方式获得球面像差误差信号：将来自光盘的返回光分成透射光和衍射光; 将具有较大光量的透射光再现信息，同时将具有少量光的衍射光分成两个区域，即靠近光轴的区域和远离光轴的区域; 确定各个区域中的聚焦偏差量作为聚焦误差信号; 并在其间取差分信号。 因此，可以以保持在高电平的信息再现信号的SN比来检测球面像差的量。
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5.发明申请Optical pick-up head, optical information apparatus, and optical information reproducing method 有权光学拾取头，光学信息装置和光学信息再现方法公开(公告)号：US20050199778A1
公开(公告)日：2005-09-15
申请号：US10646602
申请日：2003-08-22
申请人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
发明人： Shin-ichi Kadowaki , Kousei Sano , Akihiro Arai , Katsuhiko Yasuda , Tomotada Kamei , Hiroaki Yamamoto , Fumitomo Yamasaki
IPC分类号： G11B7/09 , G11B7/00 , G11B7/005 , G11B7/085 , G11B7/095 , G11B7/131 , G11B7/1353 , G11B7/1392 , G02B7/04
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0903 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.
摘要翻译： 本发明的光信息装置包括：光拾取头，包括：光源; 衍射单位; 冷凝单元; 分束器; 光检测器; 和跟踪误差信号发生器。 光记录介质具有基本上以恒定间距布置的轨道。 平均音高是tp。 当主光束被放置在轨道上时，第一子光束和第二子光束被放置在轨道之间。 跟踪误差信号发生器对从接收主波束的光接收部分输出的信号执行差分运算，产生第一推挽信号，对从光接收部分输出的信号执行差分运算 接收第一子光束和第二子光束以产生第二推挽信号，并且相对于第一推挽信号和第二推挽信号执行差分算术运算以产生跟踪误差信号， 当在与光记录介质的轨道正交的方向上扫描光束时，以间距tp获得的第一推挽信号的幅度波动的情况。
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6.发明授权公开(公告)号：US06882607B2
公开(公告)日：2005-04-19
申请号：US10691327
申请日：2003-10-22
CPC分类号： G11B7/1353 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131 , G11B7/1381 , G11B2007/13727
摘要： An optical head device includes a light source for emitting light; a collection optical system for collecting the light emitted by the light source to an information memory medium including at least one of a track having a mark or a space selectively arranged, and a track having a prescribed groove; a light detector having a plurality of detection areas for receiving the light reflected by the information memory medium and outputting a signal in accordance with a light amount of the light received; a division element for dividing the light reflected by the information memory medium and allowing the light to be received by the light detector; a switch element for receiving a first signal and a second signal, which are respectively obtained in accordance with the reflected light incident on a first prescribed area and a second prescribed area of the division element and outputting either one of the first signal or the second signal, the first and second prescribed areas being obtained by dividing the division element along at least one division line; and an information reproduction signal generator for receiving the signal output by the switch element and generating information recorded on the track. The switch element outputs either one of the first signal and the second signal in accordance with a distance and a positional relationship between a light collection point of the light output from the collection light system and the track.
摘要翻译： 光头装置包括用于发光的光源; 收集光学系统，用于将由光源发射的光收集到信息存储介质中，所述信息存储介质包括具有选择性排列的标记或空间的轨道和具有规定槽的轨道中的至少一个; 具有多个检测区域的光检测器，用于接收由信息存储介质反射的光并根据所接收的光的光量输出信号; 分割元件，用于分割由信息存储介质反射的光并允许光被光检测器接收; 用于接收第一信号和第二信号的开关元件，它们分别根据入射在分割元件的第一规定区域和第二规定区域上的反射光获得并输出第一信号或第二信号 所述第一规定区域和所述第二规定区域通过沿着至少一个分割线划分所述分割单元而获得; 以及信息再现信号发生器，用于接收由开关元件输出的信号并产生记录在轨道上的信息。 开关元件根据从收集光系统输出的光的光收集点和轨道之间的距离和位置关系，输出第一信号和第二信号中的任一个。
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7.发明授权Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same 失效光头装置，使用该装置的倾斜检测装置以及使用该装置的光信息处理装置公开(公告)号：US06744707B1
公开(公告)日：2004-06-01
申请号：US09288304
申请日：1999-04-08
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131 , G11B7/1381 , G11B2007/13727
摘要： An optical head device includes a light source for emitting light; a collection optical system for collecting the light emitted by the light source to an information memory medium including at least one of a track having a mark or a space selectively arranged, and a track having a prescribed groove; a light detector having a plurality of detection areas for receiving the light reflected by the information memory medium and outputting a signal in accordance with a light amount of the light received; a division element for dividing the light reflected by the information memory medium and allowing the light to be received by the light detector; a switch element for receiving a first signal and a second signal, which are respectively obtained in accordance with the reflected light incident on a first prescribed area and a second prescribed area of the division element and outputting either one of the first signal or the second signal, the first and second prescribed areas being obtained by dividing the division element along at least one division line, and an information reproduction signal generator for receiving the signal output by the switch element and generating information recorded on the track. The switch element outputs either one of the first signal and the second signal in accordance with a distance and a positional relationship between a light collection point of the light output from the collection light system and the track.
摘要翻译： 光头装置包括用于发光的光源; 收集光学系统，用于将由光源发射的光收集到信息存储介质中，所述信息存储介质包括具有选择性排列的标记或空间的轨道和具有规定槽的轨道中的至少一个; 具有多个检测区域的光检测器，用于接收由信息存储介质反射的光并根据所接收的光的光量输出信号; 分割元件，用于分割由信息存储介质反射的光并允许光被光检测器接收; 用于接收第一信号和第二信号的开关元件，它们分别根据入射在分割元件的第一规定区域和第二规定区域上的反射光获得并输出第一信号或第二信号 通过沿着至少一个分割线分割分割单元获得第一和第二规定区域，以及信息再现信号发生器，用于接收由开关元件输出的信号并产生记录在轨道上的信息。 开关元件根据从收集光系统输出的光的光收集点和轨道之间的距离和位置关系，输出第一信号和第二信号中的任一个。
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公开(公告)号：US06327231B1
公开(公告)日：2001-12-04
申请号：US09640702
申请日：2000-08-17
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131
摘要： An optical head device includes a light source for emitting at least one of a coherent beam and a quasi-monochromatic beam; a collection optical system for collecting the beam to an information memory medium having a track which has at least one mark and at least one space; a light detector having a plurality of detection areas for receiving the beam reflected by the information memory medium and outputting a signal in accordance with a light amount of the beam received; and a tracking error signal generator for receiving the signals output from the light detector and generating a tracking error signal based on the signals. The tracking error signal generator reduces a difference between a first signal amplitude and a second signal amplitude. The first signal amplitude is an absolute value of a difference between first and second signal levels. The second signal amplitude is an absolute value of a difference between the first and third signal levels. The first signal level is a value of the tracking error signal obtained when the beam emitted by the light source is radiated to a center of the track. The second and third signal levels are, respectively, a maximum value and a minimum value of the tracking error signal obtained when the information memory medium is scanned by the beam emitted by the light source in a direction perpendicular to the track.
摘要翻译： 光头装置包括用于发射相干光束和准单色光束中的至少一个的光源; 收集光学系统，用于将光束收集到具有至少一个标记和至少一个空间的轨道的信息存储介质; 具有多个检测区域的光检测器，用于接收由信息存储介质反射的光束并根据所接收的光束的光量输出信号; 以及跟踪误差信号发生器，用于接收从光检测器输出的信号，并基于该信号产生跟踪误差信号。 跟踪误差信号发生器减小第一信号幅度和第二信号幅度之间的差。 第一信号幅度是第一和第二信号电平之差的绝对值。 第二信号幅度是第一和第三信号电平之间的差的绝对值。 第一信号电平是当由光源发射的光束被辐射到轨道的中心时获得的跟踪误差信号的值。 第二和第三信号电平分别是当信息存储介质被光源在与光道垂直的方向上发射的光束扫描时获得的跟踪误差信号的最大值和最小值。
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9.发明授权Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same 有权光头装置，使用该装置的倾斜检测装置以及使用该装置的光信息处理装置公开(公告)号：US06314068B1
公开(公告)日：2001-11-06
申请号：US09640769
申请日：2000-08-17
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/0943 , G11B7/0953 , G11B7/0956 , G11B7/131
摘要： An inclination detection apparatus is provided which includes an optical system for collecting a beam emitted by a light source onto an information memory medium. The inclination detection apparatus further includes a light detector for generating a detection signal in accordance with a light amount of the beam reflected by the information memory medium, the light detector including a first light receiving section and a second light receiving section. In addition, the inclination detection apparatus includes a signal processing section for processing the detection signal. The signal processing section generates an inclination detection signal based on a difference between a first sum signal and a second sum signal, the first sum signal being based on a sum of a first light receiving section signal and a second light receiving section signal, the second sum signal being based on a sum of a third light receiving section signal and a fourth light receiving section signal. Moreover, the signal processing section generates a tracking error signal based on a difference between a fifth light receiving section signal and a sixth light receiving section signal.
摘要翻译： 提供了一种倾斜检测装置，其包括用于将由光源发射的光束收集到信息存储介质上的光学系统。 倾斜检测装置还包括光检测器，用于根据由信息存储介质反射的光束的光量产生检测信号，光检测器包括第一光接收部分和第二光接收部分。 此外，倾斜检测装置包括用于处理检测信号的信号处理部。 信号处理部分基于第一和信号和第二和信号之间的差产生倾斜检测信号，第一和信号基于第一光接收部分信号和第二光接收部分信号的和，第二和 和信号基于第三光接收部分信号和第四光接收部分信号的和。 此外，信号处理部分基于第五光接收部分信号和第六光接收部分信号之间的差产生跟踪误差信号。
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10.发明授权Optical head device, information recording and reproducing apparatus and optical system 失效光头设备，信息记录和再现设备以及光学系统公开(公告)号：US06181491B2
公开(公告)日：2001-01-30
申请号：US09366373
申请日：1999-08-03
申请人： Kousei Sano , Shin-ichi Kadowaki
发明人： Kousei Sano , Shin-ichi Kadowaki
IPC分类号： G02B702
CPC分类号： G11B7/139 , G11B7/123 , G11B7/1353 , G11B7/1374 , G11B7/1381
摘要： An optical head device capable of stably positioning an information head device even if a distance between the object point and the image point is reduced so as to miniaturize the device can be realized. The optical head device comprises a semiconductor laser emitting a light beam, a lens converging the light beam emitted from the semiconductor laser to a disk and a holding means maintaining the disk at a constant distance from the lens. The optical head device satisfies the following equations 24 and 25: L2=f×L1/(L1−f) (equation 24) h
摘要翻译： 即使减少对象点与图像点之间的距离，能够稳定地定位信息头装置的光头装置能够实现装置的小型化。 光头装置包括发射光束的半导体激光器，将从半导体激光器发射的光束会聚到盘上的透镜以及保持光盘与透镜恒定距离的保持装置。 光头装置满足以下等式24和25：其中f表示透镜的焦距，L1表示半导体激光器和位于透镜的半导体激光器侧的第一主点之间的距离，h表示 位于透镜的盘侧的第二主点和由保持装置保持的盘。
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