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1. 发明授权

US06667998B1 Thermoelectric cooler linearization in a tunable laser 有权
标题翻译：可调谐激光器中的热电冷却器线性化
公开(公告)号：US06667998B1
公开(公告)日：2003-12-23
申请号：US10396930
申请日：2003-03-24
申请人： Jiann-Chang Lo , Mark S. Rice
发明人： Jiann-Chang Lo , Mark S. Rice
IPC分类号： H01S304
CPC分类号： H01S5/02415 , H01S5/02248 , H01S5/02438 , H01S5/06837 , H01S5/0687 , H01S5/141
摘要： A method for tuning a laser via a temperature control loop that linearizes a non-linear characteristic of a thermal electric cooler (TEC) element used to adjust the temperature of tuning components and corresponding laser apparatus. One or more TEC elements are thermally coupled to respective tuning components, such as etalon filters. The TEC elements provide a heat transfer function (cooling rate) in response to a received electrical input (drive signal), wherein the relationship between the cooling rate and the drive signal is non-linear. An un-compensated drive signal produced by the control loop is compensated such that the open loop gain of the control loop is linearized via a linearizer control block. In effect, the non-linear transfer function of the TEC element is cancelled out by the linearizer control block to produce a linear relationship between the cooling rate and the drive signal. This open loop gain linearization enables tuning events such as channel slewing, and laser start-up operations to be performed with reduced tuning overshoots and undershoots that would otherwise result from the non-linear TEC transfer function characteristic.
摘要翻译：一种用于通过线性化用于调节调谐组件和对应的激光装置的温度的热电冷却器（TEC）元件的非线性特性的温度控制回路来调谐激光的方法。一个或多个TEC元件热耦合到相应的调谐组件，例如标准具过滤器。 TEC元件响应于接收的电输入（驱动信号）提供传热功能（冷却速率），其中冷却速率与驱动信号之间的关系是非线性的。由控制环路产生的未补偿的驱动信号被补偿，使得控制回路的开环增益通过线性化控制块线性化。实际上，TEC元件的非线性传递函数被线性化器控制块消除，以产生冷却速率和驱动信号之间的线性关系。这种开环增益线性化使得可以执行调谐事件，例如通道回转和激光启动操作，同时以非线性TEC传递功能特性导致的调谐过冲和欠冲调降。

2. 发明授权

US5804982A Miniature probe positioning actuator 失效
标题翻译：微型探头定位执行器
公开(公告)号：US5804982A
公开(公告)日：1998-09-08
申请号：US451634
申请日：1995-05-26
申请人： Jiann-Chang Lo , Michael Servedio , James Michael Hammond
发明人： Jiann-Chang Lo , Michael Servedio , James Michael Hammond
IPC分类号： G01L1/00 , G01R1/06 , G01R1/067 , G01R31/28 , G05D3/00 , H01L21/66
CPC分类号： G01R1/06705
摘要： Disclosed is a Mini Probe Positioning Actuator which is low in cost and mass, capable of high accelerations, relatively long stroke and compact packaging. The probe positioning actuator is composed of a pair of substantially parallel cantilevered beams, each beam being comprised of flexible, signal carrying cable formed of a polyimide composition which allows for the probe tip to be suspended from and form part of the armature of the actuator. The armature also includes a pair of oppositely wound coils intermediate the beams, which coils coact electromagnetically with a pair of spaced apart but fixedly positioned (relative to the coils/armature) magnets forming a motor for effecting armature and thus probe tip movement. The light mass of the coils and armature and the dual functional purpose of the suspension beams serves to make the probe actuator highly accurate and sensitive while allowing for reliable operation.
摘要翻译：公开了一种小型探头定位致动器，其成本和质量低，能够高加速度，相对较长的行程和紧凑的包装。探针定位致动器由一对基本上平行的悬臂梁组成，每个梁由柔性的由聚酰亚胺组合物形成的信号承载电缆组成，其允许探针尖端悬挂在驱动器的电枢上并形成其一部分。电枢还包括一对相对缠绕的线圈，该线圈在电磁线圈共同电磁地与一对间隔开但固定地定位（相对于线圈/电枢）磁体形成用于实现电枢并因此探测尖端运动的电动机。线圈和电枢的轻质量以及悬挂梁的双重功能用于使探头致动器高度精确和灵敏，同时允许可靠的操作。

3. 发明授权

US5631856A Test sequence optimization process for a circuit tester 失效
标题翻译：电路测试仪的测试序列优化过程
公开(公告)号：US5631856A
公开(公告)日：1997-05-20
申请号：US373338
申请日：1995-01-17
申请人： Steven A. Keller , Jiann-Chang Lo , James C. Mahlbacher
发明人： Steven A. Keller , Jiann-Chang Lo , James C. Mahlbacher
IPC分类号： G01R1/04 , G01R1/067 , G01R15/12
CPC分类号： G01R1/04 , G01R1/06705
摘要： The sequential order of movements of a number of probes within a circuit test fixture is optimized through the use of an algorithm which sequentially orders test configurations provided in an input list. Each test configuration corresponds to the locations of probes within the fixture as a particular test is performed. In a first pass of the algorithm, for each test configuration, every other test configuration is considered as a next move candidate for which a weighted distance is calculated from the test configuration. Weighting factors reflect the degree of difficulty in moving one direction instead of another. A need to move one probe before another or to move in one direction before another, in order to prevent a collision within the test fixture, is also considered. A predetermined number of next move candidates having the lowest weighted distances are placed in an intermediate list for the test configuration. In a second pass of the algorithm, test configurations are linked, one to another, to form a list reflecting a preferred order of probe movement. In the process of linking with a test configuration, the available next move candidate having the shortest weighted distance is chosen from the intermediate list of the test configuration. If no available next move candidates remain in the intermediate list, the process returns to the first pass of the algorithm to get more next move candidates. Additionally, the algorithm is used to sequentially order individual points for a test fixture having only a single probe.
摘要翻译：通过使用顺序地对输入列表中提供的测试配置进行排序的算法来优化电路测试夹具内的多个探针的顺序顺序。执行特定测试时，每个测试配置对应于夹具内探头的位置。在算法的第一遍中，对于每个测试配置，每个其他测试配置被认为是从测试配置计算加权距离的下一个移动候选。加权因素反映了移动一个方向而不是另一个方向的困难程度。还需要将一个探针移动到另一个之前或者在另一个方向上移动到另一个之前，以便防止测试夹具内的碰撞。具有最低加权距离的预定数量的下一移动候选者被放置在测试配置的中间列表中。在算法的第二遍中，测试配置彼此相连，以形成反映探测器移动的优选顺序的列表。在与测试配置链接的过程中，从测试配置的中间列表中选择具有最短加权距离的可用下一移动候选。如果没有可用的下一个移动候选者保留在中间列表中，则该过程返回到算法的第一遍，以获得更多的下一移动候选。另外，该算法用于顺序地排列仅具有单个探针的测试夹具的单个点。

4. 发明申请

US20050071499A1 Real-time diagnostic data streams for tunable optical devices 审中-公开
标题翻译：可调谐光学器件的实时诊断数据流
公开(公告)号：US20050071499A1
公开(公告)日：2005-03-31
申请号：US10675825
申请日：2003-09-30
申请人： Rajesh Batra , Ken Koller , Jiann-Chang Lo , Andrew Daiber , Mark Rice , David Thiesen
发明人： Rajesh Batra , Ken Koller , Jiann-Chang Lo , Andrew Daiber , Mark Rice , David Thiesen
IPC分类号： H04L12/26 , G06F15/16
CPC分类号： H04L43/00
摘要： An apparatus and method to provide real-time diagnostic data streams for a tunable optical device. Data from a tunable optical device is captured in real-time during operation of the tunable optical device. The data is formatted into data frames and streamed from the tunable optical device via a serial interface. The data is received at a data acquisition unit and stored at a storage device. The data gathered during the operation of the tunable optical device may be studied later to review operations of the tunable optical device and to diagnose errors.
摘要翻译：一种用于为可调光学装置提供实时诊断数据流的装置和方法。来自可调谐光学器件的数据在可调谐光学器件的操作期间被实时捕获。将数据格式化为数据帧，并通过串行接口从可调谐光学设备流式传输。数据在数据获取单元处被接收并存储在存储装置中。以后可以研究在可调谐光学器件的操作期间收集的数据以检查可调谐光学器件的操作并诊断错误。

5. 发明授权

US06724790B1 Laser facet phase control 有权
标题翻译：激光刻面相位控制
公开(公告)号：US06724790B1
公开(公告)日：2004-04-20
申请号：US10335775
申请日：2002-12-31
申请人： Andrew Daiber , Jiann-Chang Lo , Paul Chi-Hwa Lin
发明人： Andrew Daiber , Jiann-Chang Lo , Paul Chi-Hwa Lin
IPC分类号： H01S304
CPC分类号： H01S5/0687 , H01S5/005 , H01S5/0612 , H01S5/0654 , H01S5/141 , H01S5/142
摘要： A tunable external cavity laser apparatus and method of laser operation. The apparatus includes a gain medium having first and second facets defining a facet laser cavity in which a first portion of light is internally reflected to produce a first lasing condition having a first reflection phase. A reflective element is positioned opposite the second facet of the gain medium, forming an external laser cavity defined by the first facet and reflective element. A second portion of light is internally reflected within the external cavity to produce a second lasing condition having a second reflection phase. A phase adjustment means is employed to adjust the first reflection phase relative to the second reflection phase so as to control a characteristic of the output beam emitted from the apparatus, such as the power output level of the beam. In one aspect, the relative phase is adjusted by controlling the temperature of the gain medium.
摘要翻译：一种可调谐外腔激光装置及其激光手术方法。该装置包括增益介质，该增益介质具有限定小平面激光腔的第一和第二面，其中第一部分光在内部被反射以产生具有第一反射相位的第一激光状态。反射元件与增益介质的第二面相对设置，形成由第一面和反射元件限定的外部激光腔。第二部分光在外部空腔内部反射以产生具有第二反射相位的第二激光条件。使用相位调整装置来相对于第二反射相位调节第一反射相位，以便控制从装置发射的输出光束的特性，例如光束的功率输出电平。在一个方面，通过控制增益介质的温度来调整相对相位。

6. 发明授权

US06583964B1 Disk drive with mode canceling actuator 失效
标题翻译：带有取消执行器的磁盘驱动器
公开(公告)号：US06583964B1
公开(公告)日：2003-06-24
申请号：US09272941
申请日：1999-03-18
申请人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo , Matthew T. White
发明人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo , Matthew T. White
IPC分类号： G11B2110
CPC分类号： G11B5/4833 , G11B5/4813 , G11B33/08
摘要： A disk drive having an arm assembly equipped with a primary actuator such as a VCM and a mode-canceling actuator such as a PZT mounted at a location selected in such a way that the strain in the mode-canceling actuator is in phase with sway deformations of the primary actuator produced by the vibrational modes of the arm assembly. The primary actuator is driven to exert a primary force, f ⋁ pm , on the arm assembly while the secondary driver ensures that the mode-canceling actuator applies a mode-canceling force, f ⋁ m ⁢ ⁢ c , on arm assembly such that the gain and phase of one or more vibrational modes are canceled.
摘要翻译：具有臂组件的盘驱动器，其具有诸如VCM的主要致动器和诸如PZT的模式消除致动器，其安装在以使得模式消除致动器中的应变与摇摆变形相同的位置通过臂组件的振动模式产生的主致动器。主辅助致动器被驱动以在臂组件上施加一次力，而次级驾驶员确保模式消除致动器在臂组件上施加减震力，使得一个或多个振动模式的增益和相位被取消。

7. 发明授权

US6104581A Dual coil rotary actuator 有权
标题翻译：双线圈旋转执行器
公开(公告)号：US6104581A
公开(公告)日：2000-08-15
申请号：US167127
申请日：1998-10-05
申请人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo , Roger William Wood
发明人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo , Roger William Wood
IPC分类号： G11B21/02 , G11B5/48 , G11B5/55 , G11B21/08
CPC分类号： G11B5/5521 , G11B5/4806
摘要： An actuator assembly having two coils disposed between the poles of a voice coil motor (VCM) magnet for improved dynamic performance during settling and tracking operations in a disk drive. The two coils in the VCM are connected to separate current sources to allow the current flow in the two coils to have the same sense (clockwise or counterclockwise) or the opposite sense with respect to each other. When the current flows in the two coils have the opposite sense, excitation of the principal in-plane bending mode resonance of the actuator assembly is suppressed allowing the use of an increased servo bandwidth for settling and tracking operations of the disk drive. During seek operations of the disk drive, where maximum torque on the actuator is desirable, the coil currents in the two coils are chosen to have the same sense so that the forces on the actuator from the two coils are additive.
摘要翻译：具有设置在音圈电机（VCM）磁体的极之间的两个线圈的致动器组件，用于在磁盘驱动器中的稳定和跟踪操作期间改善动态性能。 VCM中的两个线圈连接到单独的电流源，以允许两个线圈中的电流具有相同的感测（顺时针或逆时针）或相对于彼此的相反感。当两个线圈中的电流流动具有相反的感觉时，致动器组件的主要的平面内弯曲模式谐振的激励被抑制，从而可以使用增加的伺服带宽来进行磁盘驱动器的稳定和跟踪操作。在磁盘驱动器的寻道操作期间，在执行器上的最大扭矩是期望的，两个线圈中的线圈电流被选择为具有相同的感测，使得来自两个线圈的致动器上的力是相加的。

8. 发明授权

US6100623A Piezoelectric actuator for control and displacement sensing 失效
标题翻译：用于控制和位移检测的压电致动器
公开(公告)号：US6100623A
公开(公告)日：2000-08-08
申请号：US139541
申请日：1998-08-25
申请人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo
发明人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo
IPC分类号： G11B5/55 , H01L41/04 , H02N2/06 , H01L41/08
CPC分类号： G11B5/4873 , H02N2/062 , G11B5/5552
摘要： A system and method for using a piezoelectric (PZT) element to simultaneously actuate and sense a displacement of an arm assembly; e.g., an assembly for reading and writing data in a storage medium. The simultaneous actuating and sensing function of the PZT is achieved by adding a high-frequency excitation to a control signal which actuates the PZT. The control signal and the high-frequency excitation cause deformation of the PZT translating into arm displacement and cause the generation of an electrical response signal by the PZT. A bridge which simulates the reactance/resistance of the PZT receives the response signal and derives from it the displacement of the arm assembly. Suitable compensation techniques for active control of the PZT and for mitigation of mechanical vibrations and other disturbances experienced by the arm assembly may then be implemented based on the displacement.
摘要翻译：一种用于使用压电（PZT）元件来同时致动并感测臂组件的位移的系统和方法; 例如用于在存储介质中读取和写入数据的组件。通过向驱动PZT的控制信号增加高频激励来实现PZT的同时启动和检测功能。控制信号和高频激励导致PZT转变为臂位移的变形，并引起PZT产生电响应信号。模拟PZT的电抗/电阻的桥梁接收响应信号，并从其中得出臂组件的位移。然后可以基于位移来实现用于PZT的主动控制和用于减轻臂组件经历的机械振动和其他干扰的合适的补偿技术。

9. 发明授权

US5543726A Open frame gantry probing system 失效
标题翻译：开式龙门探测系统
公开(公告)号：US5543726A
公开(公告)日：1996-08-06
申请号：US176810
申请日：1994-01-03
申请人： James E. Boyette, Jr. , Jiann-Chang Lo , Michael Servedio
发明人： James E. Boyette, Jr. , Jiann-Chang Lo , Michael Servedio
IPC分类号： G01R31/28 , G01R1/06 , G01R1/073 , G01R31/02
CPC分类号： G01R1/07335
摘要： A system for probing both sides of a high density printed circuit board includes an open frame extending around the circuit board when it is held in a test position by a circuit board carrier. The frame includes two parallel rail structures extending above, and at opposite ends of, the circuit board in the test position. The frame also includes another two parallel rail structures extending below, and at opposite ends of, the circuit board. The upper and lower rail structures extend perpendicularly to one another, and are fastened together at the corners of the frame by means of compression bolt assemblies. Two gantry structures are moved in a first direction between the upper rail structures, while two other gantry structures are moved in a direction perpendicular to the first direction between the lower rail structures. A carriage moves along each gantry structure, and a probe is mounted on each carriage to be moved toward and away from the adjacent surface of the circuit board. The circuit board is moved by a board carrier between a position, outside the frame, in which it is loaded and unloaded, and the test position.
摘要翻译：用于探测高密度印刷电路板的两侧的系统包括当通过电路板载体保持在测试位置时围绕电路板延伸的开放框架。该框架包括在测试位置的电路板的上方和相对两端延伸的两个平行的轨道结构。框架还包括在电路板的下方和相对端延伸的另外两个平行的轨道结构。上下轨道结构彼此垂直延伸，并通过压缩螺栓组件在框架的角部处紧固在一起。两个龙门结构在上轨道结构之间沿第一方向移动，而两个其他机架结构在垂直于下轨道结构之间的第一方向的方向上移动。托架沿着每个机架结构移动，并且探针安装在每个托架上以朝向和远离电路板的相邻表面移动。电路板由板载体在框架外部位于其装载和卸载位置之间的位置和测试位置之间移动。

10. 发明申请

US20080159340A1 External cavity laser tuning element dither servo control 有权
标题翻译：外腔激光调谐元件抖动伺服控制
公开(公告)号：US20080159340A1
公开(公告)日：2008-07-03
申请号：US11647783
申请日：2006-12-29
申请人： Andrew Daiber , Anand S. Ramalingam , Jiann-Chang Lo , Douglas A. Sprock , William B. Chapman
发明人： Andrew Daiber , Anand S. Ramalingam , Jiann-Chang Lo , Douglas A. Sprock , William B. Chapman
IPC分类号： H01S3/106
CPC分类号： H01S5/141 , H01S3/1062 , H01S5/02248 , H01S5/02415 , H01S5/02438 , H01S5/0617 , H01S5/06804 , H01S5/0687
摘要： According to embodiments of the present invention, an external cavity laser includes one or more tuning elements. At least one modulated voltage signal or dither is used to lock the transmission peak of the two tuning elements to each other. The wavelength of the laser also may lock onto the lock transmission peaks. In embodiments in which two dither signals are used, the dither signals may be orthogonal to or independent of each other. The two dither signals may produce two control signals to align the transmission peak of one filter to the transmission peak of another filter and the lasing mode of the laser to the aligned filters.
摘要翻译：根据本发明的实施例，外腔激光器包括一个或多个调谐元件。使用至少一个调制电压信号或抖动来将两个调谐元件的传输峰值彼此锁定。激光器的波长也可能锁定在锁定传输峰值上。在使用两个抖动信号的实施例中，抖动信号可以彼此正交或彼此独立。两个抖动信号可以产生两个控制信号，以将一个滤波器的传输峰值与另一个滤波器的传输峰值对齐，并将激光器的激光模式对齐到对准的滤波器。

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