公开(公告)号：US07110342B2

公开(公告)日：2006-09-19

申请号：US10264297

申请日：2002-10-02

申请人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

发明人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1398 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1372 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925

摘要： An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration occurring in the objective lens is provided between the semiconductor laser light source and the optical information medium. A light distribution correction element in which the transmittance increases with the distance from the center of the aperture surface of the objective lens is provided so as to correct a reduction of the intensity of the light incident on the aperture surface of the objective lens with the distance from the center of the aperture surface.

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

IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

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。

公开(公告)号：US20050207328A1

公开(公告)日：2005-09-22

申请号：US10516220

申请日：2003-05-26

申请人： Hiroaki Yamamoto ,  Teruhiro Shiono ,  Tatsuo Ito ,  Seiji Nishino

发明人： Hiroaki Yamamoto ,  Teruhiro Shiono ,  Tatsuo Ito ,  Seiji Nishino

IPC分类号： G11B7/004 ,  G11B7/0045 ,  G11B7/243 ,  G11B7/26

CPC分类号： G11B7/243 ,  G11B7/00455 ,  G11B7/24038 ,  G11B7/257

摘要： An optical recording medium which is a multilayer optical recording medium including a plurality of recording layers and records or reproduces information by the irradiation of light having a wavelength of λ0. At least one recording layer out of a plurality of recording layers includes a variable absorption film. The variable absorption film contains a material in which an electron energy has a band structure, and the absorption end of an absorption spectrum moves toward a longer wavelength side with a rise in temperature when light is absorbed by transition between electron bands, has a first absorptance to light having a wavelength of λ0 when a film temperature is a first temperature (application environment temperature), and has a second absorptance higher than the first absorptance to light having a wavelength of λ0 when a film temperature is a second temperature higher than the first temperature.

摘要翻译： 一种光记录介质，其是包括多个记录层的多层光记录介质，并且通过照射波长为λ0的光记录或再现信息。 多个记录层中的至少一个记录层包括可变吸收膜。 可变吸收膜含有电子能量具有带状结构的材料，并且当光被电子带之间的过渡吸收时，吸收光谱的吸收端随着温度升高而向较长波长侧移动，具有第一吸收率 当膜温度为第一温度（施加环境温度）时具有λ0的波长的光，并且当膜温度比第一温度高的第一温度时，具有比第一吸收率高于具有波长λ0的光的第二吸收率 温度。

公开(公告)号：US06882607B2

公开(公告)日：2005-04-19

申请号：US10691327

申请日：2003-10-22

申请人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

发明人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

IPC分类号： G11B7/09 ,  G11B7/095 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

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。

公开(公告)号：US06744707B1

公开(公告)日：2004-06-01

申请号：US09288304

申请日：1999-04-08

申请人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

发明人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

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。

公开(公告)号：US06327231B1

公开(公告)日：2001-12-04

申请号：US09640702

申请日：2000-08-17

申请人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

发明人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

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。

公开(公告)号：US06314068B1

公开(公告)日：2001-11-06

申请号：US09640769

申请日：2000-08-17

申请人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

发明人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Ken'ichi Kasazumi ,  Seiji Nishino

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。

公开(公告)号：US5293038A

公开(公告)日：1994-03-08

申请号：US35777

申请日：1993-03-23

申请人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino

发明人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  H01J3/14

CPC分类号： G11B7/1353 ,  G11B7/123

摘要： An optical pick-up head apparatus to be used for recording and reproducing or erasing optical information on and from an optical storage medium. The head apparatus comprises a semiconductor laser source, a reflector, a reflection type holographic optical element and a photodetector. A laser beam emitted from the semiconductor laser source is incident through the reflector on the reflection type holographic optical element so as to be incident through an objective lens on the optical storage medium. The laser beam reflected and diffracted on the optical storage medium advances along the same path in the opposite direction to be incident on the reflection type holographic optical element to become diffraction beams. The diffraction beams are incident on the photodetector after being reflected on the reflector so as to obtain a focusing error signal, tracking error signal and information signal. The reflection type holographic optical element and the photodetector are formed on one semiconductor substrate, and the semiconductor laser source is disposed to be close to the photodetector on the semiconductor substrate. Due to this arrangement, the head apparatus can easily and accurately be assembled without the positional adjustment of the reflection type holographic optical element or the photodetector, thereby improving the mass productivity of the head apparatus.

摘要翻译： 一种用于在光学存储介质上记录和再现或擦除光学信息的光学拾取头装置。 头装置包括半导体激光源，反射器，反射型全息光学元件和光电检测器。 从半导体激光源发射的激光束通过反射型入射到反射型全息光学元件上，从而通过光学存储介质上的物镜入射。 在光存储介质上反射和衍射的激光束沿相反方向前进，入射到反射型全息光学元件上，成为衍射光束。 衍射光束在反射器上反射后入射到光电检测器上，以获得聚焦误差信号，跟踪误差信号和信息信号。 反射型全息光学元件和光电检测器形成在一个半导体衬底上，并且半导体激光源设置成靠近半导体衬底上的光电检测器。 由于这种布置，头部装置可以容易且准确地组装而不需要反射型全息光学元件或光电检测器的位置调整，从而提高了头部装置的批量生产率。

公开(公告)号：US5283771A

公开(公告)日：1994-02-01

申请号：US666768

申请日：1991-03-08

申请人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino

发明人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino

IPC分类号： G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  H01L31/12 ,  H01S5/00

CPC分类号： G11B7/131 ,  G11B7/123 ,  G11B7/1353

摘要： In an optical pickup head, a light source emits a light beam. A first reflecting section reflects the light beam emitted from the light source and changes a direction of a travel of the light beam emitted from the light source. A second reflecting section reflects the light beam and changes a direction of a travel of the light beam after the light beam is reflected by the first reflecting section. The light beam reflected by the second reflecting section is focused on the optical recording medium. The light beam is reflected and diffracted by the optical recording medium. The light beam reflected and diffracted by the optical recording medium is detected. A common support member is formed with both the first and second reflecting sections.

摘要翻译： 在光拾取头中，光源发射光束。 第一反射部分反射从光源发射的光束并改变从光源发射的光束的行进方向。 第二反射部分反射光束并且在光束被第一反射部分反射之后改变光束的行进方向。 由第二反射部反射的光束聚焦在光记录介质上。 光束被光学记录介质反射和衍射。 检测由光记录介质反射和衍射的光束。 共同的支撑构件与第一和第二反射部分形成。

公开(公告)号：US07787347B2

公开(公告)日：2010-08-31

申请号：US11918426

申请日：2006-04-10

申请人： Tatsuo Itoh ,  Teruhiro Shiono ,  Seiji Nishino

发明人： Tatsuo Itoh ,  Teruhiro Shiono ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/0938 ,  G11B7/123 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A laser beam 32 reflected by an information layer of a multilayer optical disc 26 is reflected and split by reflecting surfaces 31a′, 31b, 31c and 31d to be incident on a photodetector element 36 as laser beams 33, 34 and 35. The laser beam 34 is collected on a light receiving region 38 for RF detection to generate an RF signal. The laser beams 33, 35 are incident on light receiving regions 37a, 37b for focus detection, and a focus error signal is generated by an SSD method. A laser beam 65 reflected by an information layer adjacent to the above information layer partially transmits through the reflecting surface 31a′ to be imaged on a light receiving region 66 for tracking detection, and a tracking error signal is generated.

摘要翻译： 由多层光盘26的信息层反射的激光束32被作为激光束33,34,35的入射到光电检测元件36的反射面31a'，31b，31c，31d反射并分割。激光束 34被收集在用于RF检测的光接收区域38上以产生RF信号。 激光束33,35入射到受光区域37a，37b上进行焦点检测，通过SSD方法产生聚焦误差信号。 由与上述信息层相邻的信息层反射的激光束65通过反射面31a'进行部分透射，以被成像在用于跟踪检测的光接收区域66上，并产生跟踪误差信号。