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    • 8. 发明授权
    • Precision portable flange grinder
    • 精密便携式法兰研磨机
    • US06743079B2
    • 2004-06-01
    • US10128803
    • 2002-04-23
    • Roger A. BownMichael L. Watts
    • Roger A. BownMichael L. Watts
    • B24B100
    • B24B5/363B24B5/04B24B5/14B24B23/08
    • A portable precision flange grinder grinds a flange on a duct. The flange has an axis, a radius, and a periphery. A mount mounts the grinder within the duct. The mount attaches to openings at ends of the duct. A grinding wheel grinds a flange on a duct and arranged to rotate along a periphery of the flange. A first linkage translates the grinding wheel along an axis of the flange to bring the grinding wheel laterally in grinding contact with the flange. The first linkage engages with the mount along an axis of the flange. A second linkage translates the grinding wheel along a radius of the flange bringing the grinding wheel radially in grinding contact with the flange. The second linkage attaches to the first linkage. A bearing assembly rotates the grinding wheel about the periphery of the flange. The bearing assembly is attached to the first linkage.
    • 便携式精密法兰研磨机研磨管道上的法兰。 法兰具有轴,半径和外围。 安装架将研磨机安装在管道内。 安装座安装在管道末端的开口处。 研磨轮研磨管道上的凸缘并布置成沿着凸缘的周边旋转。 第一连杆沿着凸缘的轴线平移砂轮,使研磨轮横向与凸缘磨削接触。 第一连接件沿着凸缘的轴线与安装件接合。 第二连杆沿着凸缘的半径平移砂轮,使砂轮沿径向与凸缘磨削接触。 第二个链接连接到第一个连接。 轴承组件围绕凸缘的周边旋转砂轮。 轴承组件连接到第一连杆。
    • 10. 发明授权
    • Dispersion compensation for ultrashort pulse generation in tuneable
lasers
    • 可调激光器中超短脉冲发生的色散补偿
    • US5212698A
    • 1993-05-18
    • US787317
    • 1991-10-30
    • James D. KafkaMichael L. WattsShawn D. Streeby
    • James D. KafkaMichael L. WattsShawn D. Streeby
    • H01S3/098H01S3/136
    • H01S3/1109H01S2301/08H01S3/0805H01S3/0811H01S3/1068H01S3/1112H01S3/136H01S3/139
    • A mode locked pulsed laser incorporates an intracavity element to compensate for the dispersion caused by other intracavity elements. This element reduces the tendency of the pulse to broaden in the cavity due to group velocity dispersion and results in very short pulses. In the laser of the present invention, mode locking is initiated by detecting the beat frequency between adjacent longitudinal modes using a high speed photodiode. This signal is amplified and then the frequency is divided by two. The signal is passed through an electronically adjustable phase shifter and then to a power amplifier. This signal is applied to the acousto-optic modelocker. If the cavity length drifts the beat frequency between the longitudinal modes changes. The rf signal applied to the modulator changes in exactly the right manner to track the drift in cavity length. Thus the modelocker is automatically synched to the round trip of the laser cavity.
    • 锁模脉冲激光器包含腔内元件以补偿由其它腔内元件引起的色散。 该元件由于组速度分散而降低了腔内脉冲变宽的趋势并导致非常短的脉冲。 在本发明的激光器中,通过使用高速光电二极管检测相邻纵向模式之间的拍频来启动模式锁定。 该信号被放大,然后将频率除以2。 信号通过电子可调移相器,然后通过功率放大器。 该信号被应用于声光模式锁定器。 如果腔长度在纵向模式之间漂移拍频的变化。 施加到调制器的rf信号以正确的方式改变以跟踪腔长度的漂移。 因此,模式锁定器被自动地同步到激光腔的往返。