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1. 发明授权

US5471304A Laser positioning method and appartus for rotary actuator arms, and the like 失效
标题翻译：用于旋转执行器臂的激光定位方法和附件等
公开(公告)号：US5471304A
公开(公告)日：1995-11-28
申请号：US214986
申请日：1904-03-21
申请人： Charles P. Wang
发明人： Charles P. Wang
IPC分类号： G01D5/28 , G11B5/55 , G01B9/02
CPC分类号： G01D5/28 , G11B5/5521
摘要： A laser interferometer or a single aperture Laser Doppler Displacement Meter (LDDM) is used to measure the precise position of a ninety degree notch or a flat reflecting surface on a rotating arm. For the case of using the ninety degree notch, a stationary flat mirror is used to reflect back the laser beam which follows the same beam path but in the opposite direction to the receiving aperture. For the case of using a flat reflecting surface, a stationary corner cube and a stationary flat mirror are used to reflect back the laser beam which follows the same beam path but in the opposite direction all the way to the receiving aperture. For both cases, the laser beams remain aligned even though the arm rotates a large angle. Hence, the position of the rotating arm can be determined. Since the notch or flat reflecting surface is attached or integral part of the arm, the disk drive can be enclosed with the laser beam passing through a window. Hence, the technique described is non-intrusive.
摘要翻译：激光干涉仪或单孔激光多普勒位移计（LDDM）用于测量旋转臂上九十度凹口或平面反射表面的精确位置。对于使用九十度凹口的情况，使用固定平面镜来反射跟随相同光束路径但沿与接收孔径相反的方向的激光束。对于使用平坦反射表面的情况，使用静止角立方体和固定平面镜来反射跟随相同光束路径但沿相反方向一直到接收孔径的激光束。对于这两种情况，即使臂旋转大角度，激光束也保持对准。因此，可以确定旋转臂的位置。由于凹口或平坦的反射表面被附接或臂的整体部分，所以盘驱动器可以被通过窗口的激光束包围。因此，所描述的技术是非侵入性的。

2. 发明授权

US5394233A Apparatus for measuring high frequency vibration, motion, or displacement 失效
标题翻译：用于测量高频振动，运动或位移的装置
公开(公告)号：US5394233A
公开(公告)日：1995-02-28
申请号：US43367
申请日：1993-04-06
申请人： Charles P. Wang
发明人： Charles P. Wang
IPC分类号： G01H9/00 , G01P3/36 , G01P15/093 , G01S7/481 , G01S7/483 , G01C3/00 , G01B9/02 , G01C3/08
CPC分类号： G01P3/366 , G01H9/00 , G01P15/093 , G01S7/4811 , G01S7/483 , G01S7/497
摘要： Apparati and methods are disclosed for detecting vibrations, displacements and motions of a remote surface with high sensitivity, high frequency response and high accuracy using a laser beam with optical modulation, optical hetrodyning and phase detection. High speed digital signal processing is used. Shared aperture design is employed for utilization of a flat target, double-pass design for large lateral movement tolerance with high resolution, and dual target design for detection of displacement as well as angular changes in vibrational motion.
摘要翻译：公开了一种使用具有光调制，光学混合和相位检测的激光束来检测远程表面的振动，位移和运动的灵敏度，高频响应和高精度的方法。使用高速数字信号处理。采用共享孔径设计来利用平面目标，双通道设计，具有高分辨率的大横向运动公差，双目标设计用于检测位移以及振动运动中的角度变化。

3. 发明授权

US4715706A Laser doppler displacement measuring system and apparatus 失效
标题翻译：激光多普勒位移测量系统及仪器
公开(公告)号：US4715706A
公开(公告)日：1987-12-29
申请号：US920660
申请日：1986-10-20
申请人： Charles P. Wang
发明人： Charles P. Wang
IPC分类号： G01B11/00 , G01S17/36 , G01S17/50 , G01S17/58 , G01C3/08
CPC分类号： G01S17/50
摘要： Apparatus for the precise measurement of the displacement of a moving cooperative target from a reference position, traveling, for example, over a distance of several meters, and with the measurement accuracy being better than a fraction of a millimeter. The apparatus includes a low-cost laser which generates a beam of a selected frequency. The laser beam is directed at the moving target and is reflected by the target. The apparatus also includes additional elements which measure the Doppler phase shift of the reflected laser beam so as to obtain a precise measurement of the displacement of the target with respect to the reference position.

4. 发明授权

US4039971A Fast discharge, high power, electric discharge pumped gas laser 失效
标题翻译：快速放电，大功率，电动放电泵送气体激光器
公开(公告)号：US4039971A
公开(公告)日：1977-08-02
申请号：US682929
申请日：1976-05-04
申请人： Charles P. Wang , Owen L. Gibb
发明人： Charles P. Wang , Owen L. Gibb
IPC分类号： H01S3/095 , H01S3/0973 , H01S3/097
CPC分类号： H01S3/0973 , H01S3/095
摘要： Laser emission from rare gas-halogen molecules, particularly krypton fluoride, is produced by a chemical reaction initiated by an efficient, high-power, high repetition-rate, fast electric discharge device transferring energy directly to a body of the gas in a laser cavity. The discharge device is of Blumlein parallel plate condensor/conductor type in which the condensor plates and their separating dielectric are uniformly compressed within an evacuated chamber by the force of the external atmospheric pressure.

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