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公开(公告)号：US06608685B2
公开(公告)日：2003-08-19
申请号：US09855335
申请日：2001-05-14
IPC分类号： G01B902
CPC分类号： G01J3/26
摘要： A miniature, fiber-coupled Fabry-Perot interferometer has a piezoelectric transducer coupled to first and second collimating lenses. The collimating lenses collimate and interfere light energy within a gap formed between the lenses as part of the interferometer. Preferably, the lenses are matched mode gradient index lenses. Light energy coupled to the collimating lens is thus collimated and interfered within the gap. The piezoelectric transducer expands or contracts to adjust the gap, thereby adjusting the free spectral range of the interferometer. An input fiber provides input to the interferometer; an output fiber carries processed light energy of the selected free spectral range to external devices and optical systems. Metal coatings may be used to provide a capacitive feedback of lens position to calibrate the gap and, thus, the free spectral range.
摘要翻译： 微型光纤耦合法布里 - 珀罗干涉仪具有耦合到第一和第二准直透镜的压电换能器。 准直透镜准直并干涉在透镜之间形成的间隙内的光能，作为干涉仪的一部分。 优选地，透镜是匹配模式梯度折射率透镜。 因此，与准直透镜耦合的光能量在间隙内被准直和干涉。 压电传感器膨胀或收缩以调节间隙，从而调节干涉仪的自由光谱范围。 输入光纤向干涉仪提供输入; 输出光纤将所选择的自由光谱范围的经处理的光能传送到外部设备和光学系统。 可以使用金属涂层来提供透镜位置的电容反馈以校准间隙，从而校准自由光谱范围。
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公开(公告)号：US5331490A
公开(公告)日：1994-07-19
申请号：US606887
申请日：1990-10-31
IPC分类号： G11B15/675 , G11B25/06 , G11B33/02 , G11B5/58
CPC分类号： G11B33/02 , G11B15/67521 , G11B25/063
摘要： The present invention provides a back-up tape drive having a precision molded chassis with a fine positioning system for a tape head. This system includes a follower nut threadingly mounted on a lead screw that is bi-directionally rotated by a stepper motor. A lever arm engages the follower nut in a manner such that torsional moments between the forces of the follower nut and lever arm are minimized. The other end of the lever arm engages a tape head mounting unit. The lever arm pivotally engages the chassis at a predetermined midpoint of the lever arm such that a mechanical advantage is derived. The positioning system is designed so the forces acting on the tape head mounting unit are aligned to minimize the torsional forces acting on the tape head mounting unit. The tape head mounting unit further includes reference features that reduce the need for azimuth and zenith adjustment.
摘要翻译： 本发明提供了一种具有精密模制底盘的备用磁带驱动器，其具有用于磁带头的精细定位系统。 该系统包括螺纹安装在由步进电机双向旋转的导螺杆上的从动螺母。 杠杆臂以使得从动螺母和杠杆臂的力之间的扭转力矩最小化的方式与从动螺母接合。 杠杆臂的另一端与磁带头安装单元接合。 杠杆臂在杠杆臂的预定中点处枢转地接合底盘，从而得到机械优点。 定位系统被设计成使作用在磁带头安装单元上的力被对准，以使作用在带头安装单元上的扭转力最小化。 磁带头安装单元还包括减少对方位角和天顶调整的需要的参考特征。
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公开(公告)号：US4819092A
公开(公告)日：1989-04-04
申请号：US48017
申请日：1987-05-08
申请人： Alan J. Richards
发明人： Alan J. Richards
CPC分类号： G11B27/28 , G11B15/087 , G11B20/1205 , G11B27/24 , G11B5/00878 , G11B5/09 , G11B2220/90
摘要： Apparatus is disclosed for using a head having narrow write gap to write tracks of information on a tape for subsequent reading by other apparatus including apparatus having heads with a wide read gap. An inter track erase operation is performed prior to the writing operation. Density information is written on a plurality of tracks to indicate the flux reversal signal density used for the writing of user data elsewhere on the tape.
摘要翻译： 公开了用于使用具有窄写入间隙的磁头来写入磁带上的磁迹的装置，以便随后由包括具有宽读取间隙的磁头的装置的其它装置读取。 在写入操作之前执行间隙擦除操作。 密度信息被写在多个磁道上以指示用于在磁带上的别处写入用户数据的磁通反转信号密度。
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4.发明授权Optical tape position sensing system for magnetic tape media in computer memory backup devices 失效用于计算机存储器备份设备中磁带介质的光带位置传感系统
公开(公告)号：US5222003A
公开(公告)日：1993-06-22
申请号：US612891
申请日：1990-11-13
摘要： A computer memory backup device which utilizes magnetic tape media having aperture indications at the beginning-of-tape (bot) and the end-of-tape (eot) for accomplishing the sensing of the same is disclosed. The present invention utilizes a light pipe for directing the emitted electromagnetic radiation from an isolated source to the magnetic tape media, and focuses the radiation in proximity to the media. An integral focusing lens disposed on the exit end of the light pipe serves to converge the exiting electromagnetic radiation in this fashion. The electromagnetic radiation source, shown as a light emitting diode, is pulsed in a manner such that accuracy, as well as energy conservation, is greatly increased. A time domain filtering method is employed as a means to further enhance the system's accuracy in sensing the beginning-of-tape and end-of-tape. The devices accommodate standard aperture indications as required by ANSI specifications in both dimensional and placement aspects. When these aperture indications reach the area at which the electromagnetic radiation is being focused they permit the electromagnetic radiation to pass through the magnetic tape media at which point the electromagnetic radiation is sensed. A determination is then made appropriately as to either the beginning-of-tape or end-of-tape.
摘要翻译： 公开了一种使用磁带介质的计算机存储器备份设备，该磁带介质具有在磁带开始处的孔径指示（bot）和磁带末端（eot）以实现其感测。 本发明利用光管将发射的电磁辐射从隔离源引导到磁带介质上，并将辐射聚焦在介质附近。 设置在光管的出口端的整体聚焦透镜用于以这种方式会聚现有的电磁辐射。 作为发光二极管示出的电磁辐射源以使精度以及节能大大增加的方式被脉冲化。 采用时域滤波方法作为进一步增强系统检测磁带开始和磁带结束时的精度的手段。 这些设备在尺寸和放置方面符合ANSI规格要求的标准光圈指示。 当这些孔径指示到达电磁辐射被聚焦的区域时，它们允许电磁辐射通过磁带介质，此时感测电磁辐射。 然后适当地确定磁带的开始或磁带结束。
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