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    • 7. 发明申请
    • Optical reproducing method and optical reproducing system
    • 光学再现方法和光学再现系统
    • US20060158983A1
    • 2006-07-20
    • US11330188
    • 2006-01-12
    • Narutoshi FukuzawaTakashi KikukawaTatsuhiro KobayashiToshiki Aoi
    • Narutoshi FukuzawaTakashi KikukawaTatsuhiro KobayashiToshiki Aoi
    • G11B5/09G11B7/12
    • G11B7/1362G11B7/005G11B7/1263G11B7/127G11B7/1395
    • A super resolution optical reproducing system, which can recognize a recording mark less than a resolution limit, removes the effect of a high-frequency noise component of a high power signal obtained by irradiating a laser beam with high read power. The same recording region of an optical recording medium is irradiated according to an irradiation spot by a laser beam with an ordinary read power and an irradiation spot by a laser beam with high read power to obtain a ordinary power signal and a high power signal. The ordinary power signal and the high power signal are normalized to an average level by high pass filters and low pass filters of a high power signal processing circuit and a ordinary power signal processing circuit. Then, a subtracter subtracts the ordinary power signal from the high power signal to obtain a substrated signal. The differential signal and a ordinary reproduced signal that has passed through a parallel processing circuit are amplitude-modulated by a pre-equalizer and a parallel pre-equalizer and then added up by an adder to form a composite signal. The composite signal is output as a reproduced signal.
    • 可以识别小于分辨率极限的记录标记的超分辨率光学再现系统消除了通过以高读取功率照射激光而获得的高功率信号的高频噪声分量的影响。 通过具有普通读取功率的激光束和具有高读取功率的激光束的照射点,根据照射点照射光学记录介质的相同记录区域,以获得普通电力信号和高功率信号。 普通功率信号和高功率信号通过高功率信号处理电路和普通功率信号处理电路的高通滤波器和低通滤波器归一化为平均电平。 然后,减法器从高功率信号中减去普通功率信号,以获得一个子信号。 已经通过并行处理电路的差分信号和普通的再现信号由预均衡器和并行预均衡器进行幅度调制,然后由加法器相加以形成复合信号。 复合信号作为再现信号输出。
    • 8. 发明申请
    • Optical recording medium
    • 光记录介质
    • US20080159115A1
    • 2008-07-03
    • US12005735
    • 2007-12-28
    • Takashi KikukawaKoji MishimaToshiki Aoi
    • Takashi KikukawaKoji MishimaToshiki Aoi
    • G11B7/24
    • G11B7/24038G11B7/0079
    • An optical recording medium capable of both recording in conformity to BD standard and recording/reading in conformity to DVD or CD standard. The optical recording medium includes: at least one recording layer located in the range of 40 to 120 μm away from a light incident surface, the recording layer having a light absorption characteristic which enables write-once recording using a laser optical system having a wavelength in the range of 400 to 410 nm and a numerical aperture in the range of 0.80 to 0.90 and having a light absorption characteristic which disables write-once recording using a laser optical system having a wavelength in the range of 620 to 660 nm and a numerical aperture in the range of 0.55 to 0.65; and at least one recording layer located in the range of 570 to 630 μm away from the light incident surface, the recording layer exhibiting any one of information retention modes selected from among read-only, write-once, and rewritable using the laser optical system having a wavelength in the range of 620 to 660 nm and a numerical aperture in the range of 0.55 to 0.65.
    • 一种能够兼容BD标准的记录和符合DVD或CD标准的记录/读取的光学记录介质。 光记录介质包括:远离光入射表面的至少一个记录层位于40至120μm的范围内,该记录层具有光吸收特性,其能够使用具有波长的激光光学系统进行一次记录 范围为400〜410nm,数值孔径为0.80〜0.90,具有光吸收特性,其使用波长在620〜660nm的激光光学系统和数值孔径来禁止一次记录 在0.55〜0.65的范围内; 以及至少一个记录层,其位于远离光入射表面的570至630μm范围内,所述记录层表现出使用激光光学系统从只读,一次写入和可重写的任一种信息保持模式 具有在620至660nm范围内的波长和在0.55至0.65范围内的数值孔径。
    • 9. 发明申请
    • Data recording and readingout system
    • 数据记录和读出系统
    • US20060062110A1
    • 2006-03-23
    • US11217294
    • 2005-09-02
    • Takashi KikukawaNarutoshi FukuzawaTatsuhiro KobayashiToshiki AoiHajime Utsunomiya
    • Takashi KikukawaNarutoshi FukuzawaTatsuhiro KobayashiToshiki AoiHajime Utsunomiya
    • G11B19/02G11B5/09
    • G11B7/24085G11B7/122G11B7/1387G11B7/24065G11B7/243G11B7/257G11B2007/13727G11B2007/24304G11B2007/2432
    • In a data recording and readingout system in which data is recorded and readout, or is readout on, or from an optical recording medium 1 by irradiating a laser beam having a wavelength “λ” via an objective lens of a numerical aperture “NA” onto said optical recording medium, while the optical recording medium contains a layered structure formed by sandwiching a dielectric layer 6 between a recording layer 7 and an optical absorption layer 5, with respect to the optical recording medium 1 arranged in such a manner that data recorded by a recorded mark train can be readout and the recorded mark train contains a recorded mark smaller than, or equal to a limit of resolution, the laser beam is irradiated via the objective lens and a solid immersion lens having a refractive index “n” which is positioned between the optical recording medium and the objective lens, so that the data is recorded and readout, or is readout with respect to the optical recording medium by a recorded mark train which contains a recorded mark smaller than, equal to “λ”/(4·n2·NA).”
    • 在数据记录和读出系统中,通过经由数值孔径“NA”的物镜照射具有波长“λ”的激光束的数据被记录和读出或从光记录介质1读出数据, 所述光记录介质,而光记录介质包含通过将介质层6夹在记录层7和光吸收层5之间而形成的层状结构,相对于光记录介质1,光记录介质1以 可以读出记录标记列,并且记录标记列包含小于或等于分辨率的记录标记,经由物镜照射激光束和具有折射率“n”的固体浸没透镜,其为 位于光学记录介质和物镜之间,使得数据被记录和读出,或通过记录的标记列相对于光学记录介质读出 其包含小于等于“λ”/(4 .n 2 .NA)的记录标记。