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公开(公告)号：US5206852A
公开(公告)日：1993-04-27
申请号：US814629
申请日：1991-12-30
IPC分类号： G11B7/135 , G11B7/18 , G11B11/10 , G11B11/105
CPC分类号： G11B7/1381 , G11B11/10532
摘要： A high-density recording optical head for increasing recording density in an optical head for recording and reproducing information optically. The disclosed optical head is provided with an iris for transmitting or passing the central portion of the reflected light when the light reflected from a medium is transmitted by an ordinary objective lens. Another iris is also provided for transmitting or reflecting the periphery of the reflected light and, in this case, an improved objective lens structure including two inner and outer elements is provided. Therefore, in the disclosed optical head, only light reflected from the actual recording region is detected as a reproduction signal. According to the disclosed optical head, high-density recording in identical media becomes possible.
摘要翻译： 一种高密度记录光头，用于增加用于光学记录和再现信息的光学头中的记录密度。 所公开的光头具有用于当由普通物镜透射从介质反射的光被透射或通过反射光的中心部分的虹膜。 还设置有用于透射或反射反射光的周边的虹膜，在这种情况下，提供了包括两个内部和外部元件的改进的物镜结构。 因此，在所公开的光头中，只有从实际记录区反射的光才被检测为再现信号。 根据所公开的光头，可以在相同介质中进行高密度记录。
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公开(公告)号：US06894955B1
公开(公告)日：2005-05-17
申请号：US09675059
申请日：2000-09-29
CPC分类号： G11B7/1353 , G11B7/08517 , G11B7/08529 , G11B7/08541 , G11B7/0903 , G11B7/094 , G11B7/0953 , G11B7/0956
摘要： There are provided an information write device and an information read device enabling to generate highly accurate contrast signals. When a main light spot Pc is located at the center of the a groove G, the light spot Pc and sub light spots Psa, Psb are each adapted to radiate a disc DSC such that the sub light spots Psa, Psb radiate positions displaced from the center of the land L. The reflected beams of light from the disc DSC caused by the radiation with the light spots Pc, Psa, Psb are detected to generate push-pull signals each corresponding to the light spots Pc, Psa, Psb, respectively, in accordance with each of the detected signals. Furthermore, a signal to be obtained by amplifying an addition signal, given by adding the push-pull signals each corresponding to the sub light spots Psa, Psb, with a predetermined amplification factor K/n, and a push-pull signal corresponding to the main light spot Pc are added to thereby generate a contrast signal.
摘要翻译： 提供了一种能够产生高精度对比度信号的信息写入装置和信息读取装置。 当主光斑Pc位于凹槽G的中心时，光斑Pc和次光斑Psa，Psb各自适于辐射盘DSC，使得副光斑Psa，Psb辐射位置从 检测由具有光斑Pc，Psa，Psb的辐射引起的来自光盘DSC的反射光束，以产生分别对应于光点Pc，Psa，Psb的推挽信号， 根据每个检测到的信号。 此外，通过以预定的放大系数K / n加上每个与子光点Psa，Psb相对应的推挽信号给出的相加信号的放大而获得的信号和对应于 添加主光点Pc，从而生成对比度信号。
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公开(公告)号：US4729039A
公开(公告)日：1988-03-01
申请号：US936227
申请日：1986-12-01
申请人： Ronald L. Clark
发明人： Ronald L. Clark
摘要： A full tone image recorder which uses LEDs or the like, a thin fiber optic strip and a scanning belt with an aperture therein drawn across the fiber optic strip to create a flying spot of light for irradiating photosensitive material and producing thereon a photographic quality image of data contained in a video input.
摘要翻译： 使用LED等的全色调图像记录器，薄的光纤条和扫描带，其中具有穿过光纤条的孔，以产生用于照射感光材料的光的飞点，并在其上产生照片质量图像 视频输入中包含的数据。
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公开(公告)号：US4633457A
公开(公告)日：1986-12-30
申请号：US622395
申请日：1984-06-20
申请人： Kimiaki Yamamoto
发明人： Kimiaki Yamamoto
CPC分类号： G11B7/08 , G11B7/12 , G11B7/1381
摘要： An optical information reading apparatus wherein the intensity distribution of a light beam projected onto a video disk through an objective optical system is so made that the intensity in the direction along an information track is larger than the intensity in the direction intersecting at right angles with the information track in order to improve S/N and to eliminate cross-talks.
摘要翻译： 一种光学信息读取装置，其中通过物镜光学系统投影到视频盘上的光束的强度分布使得沿着信息轨道的方向上的强度大于与垂直方向交叉的方向上的强度 信息跟踪，以提高信息和消除交涉。
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5.发明授权
公开(公告)号：US3522389A
公开(公告)日：1970-07-28
申请号：US3522389D
申请日：1966-12-06
申请人： NORTON RESEARCH CORP
发明人： BUMILLER DONALD R
CPC分类号： H01L33/00 , G11B7/0032 , G11B7/127 , H01L2924/0002 , H01L2924/00
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6.发明授权公开(公告)号：US07697382B2
公开(公告)日：2010-04-13
申请号：US10529892
申请日：2004-09-24
CPC分类号： G03F7/70325 , G01Q60/22 , G01Q80/00 , G03F1/50 , G03F7/2014 , G03F7/7035 , G11B7/122 , G11B7/1387 , G11B2005/0005 , G11B2005/0021
摘要： A near-field light generating method for irradiating light from a light source to a metal film having a fine opening that has a size of not more than a wavelength of the light emitted from the light source, and forming a fine light spot adjacent to the fine opening on a light outgoing side of the fine opening. The method includes providing the metal film with a rectangular fine opening whose length to width ratio is between 1.1 times and 2 times that of a standard square opening, obtained by increasing the length of the standard square opening, and irradiating the metal film with light from the light source to form the fine light spot, which has a length and a width that are substantially equal to those of the standard square opening, and where the fine light spot has a light intensity, which is not less than two times that of the standard square opening. This method is applicable in a corresponding near-field optical head, which can be included either in an optical microscope to observe a sample surface or in an apparatus for recording and reproducing with respect to a recording medium.
摘要翻译： 一种近场光产生方法，用于将来自光源的光照射到具有不大于从光源发射的光的波长的尺寸的微细开口的金属膜，并且形成与该光源相邻的细光斑 在精细开口的光出射侧的细开口。 该方法包括：通过增加标准方形开口的长度，将金属膜的长宽比为标准正方形开口的1.1倍和2倍的矩形细孔提供金属膜，并用来自 该光源形成具有与标准方形开口基本相等的长度和宽度的细光斑，并且其中细光斑的光强度不小于标准方形开口的两倍 标准方形开口。 该方法适用于相应的近场光学头，其可以包括在光学显微镜中以观察样品表面或用于相对于记录介质的记录和再现装置。
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7.发明授权Method and apparatus for optically reproducing a rotatable record with a scanning light beam of changing size 失效用于以具有变化的尺寸的扫描光束光学地再现可旋转记录的方法和装置
公开(公告)号：US4157568A
公开(公告)日：1979-06-05
申请号：US855303
申请日：1977-11-28
申请人： Hiroshi Ohki , Takashi Otobe , Chiaki Kojima
发明人： Hiroshi Ohki , Takashi Otobe , Chiaki Kojima
CPC分类号： G11B7/0908 , G11B19/24 , G11B7/005 , G11B7/12 , G11B7/1381
摘要： A rotatable record carrier upon which reproducible information is recorded in the form of spaced apart pits in substantially concentric circular tracks on a surface of the carrier. The pits may represent frequency-modulated information signals, and the lengths of the pits are independent of the frequency of the information signals. A method and apparatus for reproducing information from this record carrier is disclosed, wherein a light beam is used to scan the tracks of the record medium, and the size of the scanning light beam is changed as a function of the radius of the track which then is being scanned so as to increase the size of the beam when a track of larger radius is scanned. This control over the size of the scanning beam establishes a constant relationship between the size of the beam and the length of the pits despite changes in the pit length due to the different radii of the tracks.
摘要翻译： 可旋转的记录载体，可再现的信息以分隔开的凹坑的形式记录在载体的表面上的基本上同心的圆形轨道中。 凹坑可以表示频率调制信息信号，并且凹坑的长度与信息信号的频率无关。 公开了一种用于从该记录载体再现信息的方法和装置，其中使用光束来扫描记录介质的轨道，并且扫描光束的尺寸随着轨道的半径而变化 正在进行扫描，以便当扫描较大半径的轨道时增加光束的尺寸。 对于扫描光束的尺寸的这种控制建立了光束的尺寸和凹坑的长度之间恒定的关系，尽管由于轨道的不同半径引起的凹坑长度的变化。
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公开(公告)号：US3865996A
公开(公告)日：1975-02-11
申请号：US25129872
申请日：1972-05-08
发明人： KATO MAKOTO
IPC分类号： G03H1/00 , G11B7/0065 , G11B7/1381 , G11B7/18
CPC分类号： G03H1/00 , G11B7/0065
摘要： A recording and playback apparatus for holographically recording and reproducing audio signals. In recording, the modulating element is either a vibrating mirror or an electro-optical cell. During playback, a wedged-shaped slot is positioned between the record medium and a photoelectric cell. The position of the reproduced light beam on the wedged-shaped slot is a function of the degree of modulation; thus the slot transmits an amount of light which is proportional to the recorded audio signal.
摘要翻译： 用于全息记录和再现音频信号的记录和重放装置。 在记录中，调制元件是振镜或电光单元。 在回放期间，楔形槽位于记录介质和光电池之间。 再生光束在楔形槽上的位置是调制度的函数; 因此时隙传输与记录的音频信号成比例的一定量的光。
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公开(公告)号：US3715524A
公开(公告)日：1973-02-06
申请号：US3715524D
申请日：1972-04-20
申请人： ZENITH RADIO CORP
发明人： ADLER R
CPC分类号： G11B7/0901 , H04N5/85
摘要： Video information is stored optically along a helical track on a rotating disc over which an optical pick-up moves radially in correspondence with progressive displacement of a monitored portion of the track. To maintain constant alignment between the pick-up and the track regardless of deviations in the intended radial progression of either, a control signal is applied to an electromechanical transducer in order to vary the position of the pick-up transversely relative to the monitored track portion. Spaced parallel from the disc is a mask to span a plurality of track segments. All of the slits are oriented generally along those segments, and the number of slits is slightly different from the number of the segments in the width of the span. A generally collimated beam of light is projected through the slits and the portion of the disc which carries the segment. A balanced photodetector system responds to a moire'' pattern in the light which is projected through both the slits and the disc portion in order to develop a pair of signals which represent relative departure of the pick-up laterally from the monitored track length. A differential amplifier combines these signals into a control signal which is applied to the transducer to effect a compensatory variation in the position of the pick-up.
摘要翻译： 视频信息沿着旋转盘上的螺旋轨道光学存储，光盘拾取器对应于轨道的被监测部分的逐渐移位而径向移动。 为了保持拾取器和轨道之间的恒定对准，而不管其中任何一个的预期径向进程的偏差如何，控制信号被施加到机电换能器，以便相对于监视的轨道部分横向地改变拾取器的位置 。 从盘平行的间隔是跨越多个轨道段的掩模。 所有狭缝大致沿这些部分定向，并且狭缝的数量与跨度的宽度中的段的数量略有不同。 通常准直的光束通过狭缝和承载片段的盘的部分投影。 平衡光电检测器系统响应于通过狭缝和盘部分投影的光中的莫尔条纹，以便形成一对信号，这些信号表示拾取器横向偏离所监视的轨迹长度的相对偏离。 差分放大器将这些信号组合成控制信号，该控制信号被施加到换能器以实现拾取器的位置的补偿性变化。
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10.发明授权公开(公告)号：US07200077B2
公开(公告)日：2007-04-03
申请号：US10686780
申请日：2003-10-17
申请人： Akinori Ohkubo , Takuma Yanagisawa
发明人： Akinori Ohkubo , Takuma Yanagisawa
IPC分类号： G11B7/18
CPC分类号： G11B7/1369 , G11B7/00736 , G11B7/0943 , G11B7/0956 , G11B7/13927
摘要： A tilt angle detection device and method which generates, as a first push-pull signal, a difference between light reception signals corresponding to two light receiving surfaces of one side of a photodetector, which are divided along the track tangent direction; generates, as a second push-pull signal, a difference between the light reception signals corresponding to two light receiving surfaces of the other side of the photodetector; and generates a tilt signal that indicates a tilt angle defined by a normal on the recording surface of the optical recording medium at a position of irradiation of the laser beam and the optical axis of the laser beam in accordance to a difference between amplitudes of the first and second push-pull signals.
摘要翻译： 一种倾斜角检测装置和方法，其产生沿着轨道切线方向分割的与光电检测器的一侧的两个光接收表面相对应的光接收信号之间的差作为第一推挽信号; 作为第二推挽信号产生与光电检测器的另一侧的两个光接收表面相对应的光接收信号之间的差; 并且产生一个倾斜信号，该倾斜信号指示在激光束的照射位置和激光束的光轴处的光记录介质的记录表面上的法线限定的倾斜角度，该倾斜角度根据第一 和第二推挽信号。
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