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公开(公告)号：US07016604B2
公开(公告)日：2006-03-21
申请号：US11089553
申请日：2004-06-12
申请人： Donald J. Stavely , David K. Campbell , Eric F. Aas , Gregory V. Hofer , Scott A. Woods , Dan L. Dalton , Kurt E. Spears
发明人： Donald J. Stavely , David K. Campbell , Eric F. Aas , Gregory V. Hofer , Scott A. Woods , Dan L. Dalton , Kurt E. Spears
IPC分类号： G03B13/36
CPC分类号： H04N5/23212 , G03B13/32 , G03B17/02
摘要： Autofocus methods and digital cameras employing a holographic element or hologram. The holographic element generates one or more displaced images that are processed to generate a bipolar contrast signal that provides for improved autofocus performance of the digital camera.
摘要翻译： 自动对焦方法和采用全息元素或全息图的数码相机。 全息元件产生一个或多个位移图像，其被处理以产生提供数字照相机的改进的自动对焦性能的双极性对比度信号。
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公开(公告)号：US06812907B1
公开(公告)日：2004-11-02
申请号：US09619525
申请日：2000-07-19
IPC分类号： G09G500
CPC分类号： G09G3/20 , G09G5/14 , G09G2310/0221
摘要： An electronic display comprises a plurality of independently operable segments. Each of the plurality of independently operable segments comprises a plurality of picture elements.
摘要翻译： 电子显示器包括多个可独立操作的部分。 多个可独立操作的段中的每一个包括多个图像元素。
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公开(公告)号：US06714731B2
公开(公告)日：2004-03-30
申请号：US09792318
申请日：2001-02-23
IPC分类号： G03B1700
CPC分类号： G02B7/04
摘要： A focus lens and a zoom lens group having a first zoom lens and a second zoom lens are controlled separately from one another in an internal-focus camera. The positions of the focus lens and the second zoom lens in the zoom lens group are tracked, and are controlled to approach no closer to one another than a minimum safe distance to avert collisions between the focus lens and the second zoom lens.
摘要翻译： 具有第一变焦透镜和第二变焦透镜的对焦透镜和变焦透镜组在内部对焦照相机中被彼此分离地控制。 跟踪聚焦透镜和第二变焦透镜在变焦透镜组中的位置，并且被控制为不与最小安全距离彼此更靠近，以避免对焦透镜和第二变焦透镜之间的碰撞。
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24.发明授权
公开(公告)号：US5995243A
公开(公告)日：1999-11-30
申请号：US878429
申请日：1997-06-18
CPC分类号： H04N1/00013 , H04N1/00002 , H04N1/00037 , H04N1/00045 , H04N1/00058 , H04N1/1071 , H04N1/4076 , H04N1/107
摘要： An illumination system for illuminating a scan region on an object and for providing a white level reference for a detector may comprise a light source for producing light rays and an elongate lens having a first end and a second end positioned between the light source and the scan region. The lens collects some of the light rays from the light source and directs them onto the scan region. A first spot lens is positioned adjacent the first end of the elongate lens and a second spot lens is positioned adjacent the second end of the elongate lens. The first and second spot lenses direct some of the light rays from the light source toward first and second ends of the scan line. A white level reference mark is positioned adjacent the lens and the light source so that some of the light rays from the light source are reflected by the white level reference mark to the detector.
摘要翻译： 用于照射物体上的扫描区域并为检测器提供白平衡参考的照明系统可以包括用于产生光线的光源和具有位于光源和扫描之间的第一端和第二端的细长透镜 地区。 透镜收集来自光源的一些光线并将其引导到扫描区域上。 第一光点透镜位于细长透镜的第一端附近，并且第二光点透镜邻近细长透镜的第二端定位。 第一和第二光点透镜将来自光源的一些光线引导到扫描线的第一和第二端。 白平面参考标记位于透镜和光源附近，使得来自光源的一些光线被白色参考标记反射到检测器。
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公开(公告)号：US5432763A
公开(公告)日：1995-07-11
申请号：US325532
申请日：1994-10-18
IPC分类号： G11B7/085 , G11B7/09 , G11B7/12 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10541 , G11B11/10569 , G11B11/10576 , G11B7/08576 , G11B7/09 , G11B7/093 , G11B7/0932 , G11B7/12
摘要： A miniature rotary actuator optical head assembly incorporating data and servo detecting elements mounted inside a source/detector module, which is located on the rotary actuator arm adjacent to the pivot point of the rotary actuator arm. The miniature rotary actuator optical head also includes a miniature focus motor which supports a fold mirror and an objective lens and repositions the fold mirror and objective lens simultaneously whenever a focus error is received. The focus motor can be actuated by a magnetic bias field that originates external to the rotary actuator arm, particularly the magnetic bias field generated for magneto-optical recordation. The optical assembly may also include two stage tracking by mounting the light source on a pair of lateral movement flexures and supplying a fine tracking error signal to actuate the movement of the light source.
摘要翻译： 一种微型旋转致动器光学头组件，其包含安装在源/检测器模块内的数据和伺服检测元件，其位于与旋转致动器臂的枢转点相邻的旋转致动器臂上。 微型旋转致动器光学头还包括微型聚焦马达，其支持折叠镜和物镜，并且每当接收到聚焦误差时也重新定位折叠镜和物镜。 聚焦电机可以由位于旋转致动器臂的外部的磁偏置磁场来驱动，特别是用于磁光记录产生的磁偏置磁场。 光学组件还可以包括通过将光源安装在一对横向运动弯曲上并提供精细跟踪误差信号来致动光源的运动的两级跟踪。
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26.发明授权Electronic offset compensation of the continuous composite track error signal in optical recording 失效光学记录中连续复合轨迹误差信号的电子偏移补偿
公开(公告)号：US5197058A
公开(公告)日：1993-03-23
申请号：US664881
申请日：1991-03-05
CPC分类号： G11B7/08517 , G11B7/094
摘要： When doing multitrack seek or a single track jump, the midpoint between the maximum and the minimum of a tracking error signal is determined. A peak detector detects the positive peak and the negative peak. These maximum and minimum values are stored in a sample and hold circuit. A summing circuit determines the midpoint between the maximum and the minimum of the tracking error signal. An operational amplifier provides a true error signal to the servo control system that provides the appropriate servo operating point. The invention is based on the fact that even though there is no absolute reference signal indicating the appropriate on-track position, the tracking servo system obtains the track error over the whole range of positions relative to track center when doing a multitrack seek or a single track jump. The appropriate servo operating point is the midpoint between the maximum and the minimum of the track error signal. This provides compensation for level shifts due to factors such as beam displacement, or detector mispositioning, changes in read/write beam profile, and disk tilt. The present invention solves the key disadvantage of the continuous groove tracking method by eliminating tracking offsets without adding additional information to the disk. It also avoids imposing overhead on the data channel. It compensates for effects of disk tilt, detector misalignment, detector and amplifier offsets, and beam decentration due to fine tracking.
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公开(公告)号：US4688201A
公开(公告)日：1987-08-18
申请号：US692278
申请日：1985-01-16
申请人： David K. Towner , David K. Campbell
发明人： David K. Towner , David K. Campbell
摘要： A two-stage beam positioning apparatus for use in an optical data storage device is provided. A fixed assembly includes a light beam source and detector, light beam focusing and track following apparatus. The fixed assembly is optically coupled to a movable assembly which provides coarse positioning of a focused light spot on a data storage medium such as an optical recording disc. The coarse positioning assembly is mechanically independent from the light beam source and detector assembly and, therefore, may be made very stiff and light resulting in a high bandwidth and reduced data access time. Since the light beam source and detector assembly and the focusing and track following control apparatus are mechanically isolated from the movable coarse positioning assembly, the size and mass of these components are not critical and do not affect data access time.
摘要翻译： 提供了一种用于光学数据存储装置的两级光束定位装置。 固定组件包括光束源和检测器，光束聚焦和跟踪跟踪装置。 固定组件光学耦合到可移动组件，其提供聚焦光斑的粗略定位在诸如光学记录盘的数据存储介质上。 粗定位组件在机械上独立于光束源和检测器组件，并且因此可以变得非常刚硬和光，导致高带宽和减少的数据访问时间。 由于光束源和检测器组件以及聚焦跟踪跟随控制装置与可移动粗定位组件机械隔离，因此这些部件的尺寸和质量不是关键的，并且不影响数据访问时间。
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