-
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。
-
2.发明授权Photodetector disposed on both sides of an objective lens for receiving .+-. 1st order diffractive light 失效设置在物镜两侧的光电检测器，用于接收+/- 1级衍射光
公开(公告)号：US5671208A
公开(公告)日：1997-09-23
申请号：US581334
申请日：1995-12-29
申请人： Byeong-ho Park
发明人： Byeong-ho Park
CPC分类号： G11B7/133 , G11B7/094 , G11B7/13 , G11B7/1372 , G11B7/0901 , G11B7/0956
摘要： An optical pickup provided with a photodetector for detecting a tracking error signal includes a light source for radiating light; an objective lens disposed on an optical path between the light source and a disc which is an optical recording medium for focusing the light radiated from the light source on the optical disc; a diverter for diverting the optical path of reflected light disposed between the light source and the objective lens to prevent the light reflected from the disc from being reflected back to the light source; and a photodetector for receiving the light reflected from the disc and detecting a tracking error signal and a focusing error signal. The photodetector consists of a first photodetector having a plate divided into at least two pieces for detecting light passing through the optical-path diverter converter after being reflected from the disc; and a second photodetector disposed around the objective lens and moving together therewith, and having a plate divided into at least two pieces.
摘要翻译： 设置有用于检测跟踪误差信号的光电检测器的光学拾取器包括用于照射光的光源; 物镜，设置在光源和作为用于将从光源辐射的光聚焦在光盘上的光记录介质上的光路上; 用于转向设置在光源和物镜之间的反射光的光路的分流器，以防止从盘反射的光被反射回到光源; 以及光电检测器，用于接收从盘反射的光并检测跟踪误差信号和聚焦误差信号。 光电检测器由具有被划分成至少两个片的板的第一光电检测器组成，用于在从光盘反射之后检测通过光路转向器转换器的光; 以及第二光电检测器，其设置在所述物镜周围并与其一起移动，并且具有分成至少两个部件的板。
-
3.发明授权
公开(公告)号：US5856960A
公开(公告)日：1999-01-05
申请号：US856816
申请日：1997-05-15
申请人： Min Hwangbo , Byeong-ho Park , Sung-ro Go
发明人： Min Hwangbo , Byeong-ho Park , Sung-ro Go
CPC分类号： G11B7/0945 , G11B7/094 , G11B7/0941
摘要： A servo controlling apparatus of an optical disk drive and a control method thereof are provided for achieving precise control by automatically controlling the gain of error signals caused by the difference in the amount of light irradiated during recording and reproducing, and then using the automatically gain-controlled signal. In a first control step, a focus error signal and a tracking error signal generated from a photodetecting portion via an operator are multiplied by a predetermined value in different multipliers, and then each obtained value is divided by an RF sum signal to control the value of error to within a predetermined target value. In a second control step, each multiplied focus error signal and tracking error signal are divided by a DC signal corresponding to the average level of the RF sum signal when the error value reaches the target value.
摘要翻译： 提供了一种光盘驱动器的伺服控制装置及其控制方法，用于通过自动控制在记录和再现期间照射的光量的差引起的误差信号的增益，从而实现精确的控制，然后使用自动增益 - 受控信号。 在第一控制步骤中，通过操作者从光电检测部分产生的聚焦误差信号和跟踪误差信号在不同乘法器中乘以预定值，然后将每个获得的值除以RF和信号，以控制 误差在预定目标值内。 在第二控制步骤中，当误差值达到目标值时，每个相乘的聚焦误差信号和跟踪误差信号被除以对应于RF和信号的平均电平的DC信号。
-
公开(公告)号：US5822293A
公开(公告)日：1998-10-13
申请号：US891135
申请日：1997-07-10
申请人： Yong-jae Lee , Byeong-ho Park
发明人： Yong-jae Lee , Byeong-ho Park
IPC分类号： G11B11/10 , G11B7/13 , G11B7/135 , G11B11/105 , G11B7/00
CPC分类号： G11B7/1353 , G11B11/10543 , G11B11/10597
摘要： A magnetooptical recording/reproducing apparatus including a light source for emitting light, an object lens for condensing the light onto a magnetooptical disk, a polarization beam splitter in an optical path between the light source and the object lens, a first holographic device for diffracting an ordinary beam from the light passing through the polarization beam splitter after being reflected from the magnetooptical disk and allowing an extraordinary beam to pass therethrough unaltered, a second holographic device for splitting the ordinary and extraordinary beams passed through the first holographic device into a plurality of beams, and a photodetector for detecting the beams passing through the first and second holographic devices.
摘要翻译： 一种包括用于发光的光源的磁光记录/再现装置，用于将光聚焦到磁光盘上的物镜，在光源和物镜之间的光路中的偏振分束器，用于衍射光 来自光的普通光束在从磁光盘反射并通过非常光束通过之后通过偏振分束器而不改变，第二全息装置用于将通过第一全息装置的普通和非凡光束分成多个光束 以及用于检测通过第一和第二全息装置的光束的光电检测器。
-
公开(公告)号：US5799007A
公开(公告)日：1998-08-25
申请号：US689022
申请日：1996-07-30
申请人： Yong-jae Lee , Byeong-ho Park , Kyo-bang Chung
发明人： Yong-jae Lee , Byeong-ho Park , Kyo-bang Chung
CPC分类号： G11B7/24085 , G11B7/00718 , G11B7/24079
摘要： A high density compact disc having tracks for recording large amounts of information reproducible for a long interval of time is disclosed. In order to increase the track density, a recording surface on a substrate is divided into grooves and lands to thereby form tracks, and pits representing information signals are arranged in both the grooves and the lands. Here, the groove is formed at an optimized predetermined depth, depending on the wavelength of light used to read the information recorded on the disc and the refractive index of a disc substrate, to thereby reduce crosstalk caused by pits of an adjacent groove or land during reproduction. Accordingly, the present invention is effective in enhancing the practicality of the compact disc as a medium for preserving large amounts of information.
摘要翻译： 公开了一种高密度光盘，其具有用于记录大量可重复长时间间隔的信息的轨道。 为了增加轨道密度，衬底上的记录表面被划分为凹槽和平台，从而形成轨道，并且表示信息信号的凹坑被布置在凹槽和平台中。 这里，根据用于读取记录在盘上的信息的光的波长和盘基片的折射率，凹槽以优化的预定深度形成，从而减少由相邻凹槽或平台的凹坑引起的串扰 再生产。 因此，本发明在提高作为用于保存大量信息的介质的光盘的实用性方面是有效的。
-
-
-
-
搜索结果
5 条记录 (耗时 0.022 秒)
