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1. 发明授权

US4464567A Photoelectric information and focus detector 失效
标题翻译：光电信息和焦点检测器
公开(公告)号：US4464567A
公开(公告)日：1984-08-07
申请号：US279101
申请日：1981-06-30
申请人： Charles Reilly , Leonard Laub , Krishna Swaminathan
发明人： Charles Reilly , Leonard Laub , Krishna Swaminathan
IPC分类号： G11B7/08 , G11B7/09 , G11B7/12 , H01L31/02 , G01J1/36
CPC分类号： H01L31/02024 , G11B7/0917 , G11B7/12 , G11B2007/0924
摘要： Apparatus for reading information stored in a track pattern on a radiation reflecting record comprises a source of radiation such as a laser, a diffraction grating for providing at least a zero order beam component and a pair of first order beam components, an objective lens assembly, a photodetector array, the photodetector array comprising a unitary data photodetector disposed for impingement of the zero order beam component for sensing stored information and at least first and second paired photodetector arrays adjacent to the data photodetector including separated sectors disposed along an axis including the data photodetector for providing at least focus error correction signals to the objective lens assembly, and means provided in the optical path between the objective lens assembly and the photodetector array for providing a first portion of the reading beam components which remains relatively fixed in size and a second portion of the reading beam components which varies substantially linearly in size as the record deviates from a plane of focus.
摘要翻译：用于读取存储在辐射反射记录上的轨道图案中的信息的装置包括诸如激光的辐射源，用于提供至少零级光束分量的衍射光栅和一对一级光束分量，物镜组件，一个光电检测器阵列，该光电检测器阵列包括一个统一的数据光电检测器，该单元数据光电检测器设置成用于冲击零级光束分量以便感测存储的信息;以及至少第一和第二对成对的光电检测器阵列，该数据光电检测器包括沿着包括数据光电检测器用于将至少聚焦误差校正信号提供给物镜组件，以及设置在物镜组件和光电检测器阵列之间的光路中的装置，用于提供保持相对固定尺寸的读取光束分量的第一部分和第二部分的读取光束组件是不同的当记录偏离焦点平面时，其尺寸呈线性上升。

2. 发明授权

US4458144A Apparatus for reading information stored in a track pattern on a radiation reflecting record 失效
标题翻译：用于读取存储在辐射反射记录上的轨道图案中的信息的装置
公开(公告)号：US4458144A
公开(公告)日：1984-07-03
申请号：US279100
申请日：1981-06-30
申请人： Charles Reilly , Leonard Laub , Dennis Rose
发明人： Charles Reilly , Leonard Laub , Dennis Rose
IPC分类号： G02B7/28 , G11B7/09 , G11B7/135 , G01J1/36
CPC分类号： G11B7/0909 , G11B7/1378
摘要： Apparatus for reading information stored in a track pattern on a radiation reflecting record comprises a source of radiation such as a laser for supplying at least a reading beam, an objective lens assembly for passing the reading beam to the record and for controllably focusing the reading beam at a plane of focus, a photodetector array disposed in an optical path with the lens assembly for sensing at least the recorded information and focusing errors, and an astigmatic element disposed in the optical path for producing an astigmatic image of the reading beam in which the photodetector array comprises a unitary data photodetector disposed for impingement thereon of a zero order reading beam component for sensing the recorded information, and a quadrant photodetector array adjacent to the unitary data photodetector and including separated sectors disposed along orthogonal axes for sensing relative differences of the astigmatic image along the orthogonal axes to provide at least focus error correction signals to the objective lens assembly.
摘要翻译：用于读取在辐射反射记录上以轨道图案存储的信息的设备包括用于至少提供读取光束的用于提供至少读取光束的激光源，用于将读取光束传递到记录并用于可控地聚焦读取光束在焦点平面处，设置在光路中的光检测器阵列与用于感测至少记录的信息和聚焦误差的透镜组件以及设置在光路中的散光元件以产生读取光束的像散图像，其中光电检测器阵列包括一个单一的数据光电检测器，设置成用于检测记录的信息的零级读取光束分量，以及与单一数据光电检测器相邻的象限光电检测器阵列，并且包括沿着正交轴设置的分离的扇区，用于感测散光的相对差异图像沿着正交轴提供至少焦点e 对物镜组件的反射校正信号。

3. 发明授权

US4454415A Tracking mirror assembly and control system for an optical data storage disc 失效
标题翻译：用于光学数据存储盘的跟踪镜组件和控制系统
公开(公告)号：US4454415A
公开(公告)日：1984-06-12
申请号：US279099
申请日：1981-06-30
申请人： Ashok B. Nayak , Leonard Laub
发明人： Ashok B. Nayak , Leonard Laub
IPC分类号： G11B7/085 , G11B7/09 , G11B7/095 , G01J1/20
CPC分类号： G11B7/0953 , G11B7/085 , G11B7/0925
摘要： Apparatus for reading information stored in a track pattern on a radiation reflecting record comprises a source of radiation for supplying a reading beam a tracking mirror assembly controllable for directing the reading beam in a radial direction on the record, an objective lens for controlling focus, a data photodetector and at least a first paired photodetector array including separated sectors for providing tracking error correction signals, optical detenting means comprising at least a second source of radiation fixed in place relative to an undeflected position of the tracking mirror and a second paired photodetector array associated with the second source for detecting movement of the tracking mirror from its undeflected position and means coupled from the output of the second photodetector array to the tracking mirror assembly for providing error correction signals to maintain the detent conditions during slewing.
摘要翻译：用于读取存储在辐射反射记录上的轨道图案中的信息的装置包括用于提供读取光束的辐射源，跟踪反射镜组件可控制，用于将读取光束沿径向引导到记录上，用于控制焦点的物镜，数据光电检测器和至少第一配对光电检测器阵列，其包括用于提供跟踪误差校正信号的分离的扇区，光学定位装置，包括相对于跟踪反射镜的未偏转位置固定在适当位置的至少第二辐射源，以及相关联的第二成对光电检测器阵列用于检测跟踪反射镜从其未偏转位置的移动的第二源和从第二光电检测器阵列的输出耦合到跟踪反射镜组件的装置，用于提供纠错信号以在回转期间维持制动条件。

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