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    • 1. 发明授权
    • Method of and apparatus for calibration of machines
    • 机器校准方法和设备
    • US5007006A
    • 1991-04-09
    • US264968
    • 1988-10-25
    • Benjamin R. TaylorMark A. V. ChapmanJeffrey Graham
    • Benjamin R. TaylorMark A. V. ChapmanJeffrey Graham
    • G01B21/00G01B11/00G01B21/04
    • G01B11/005G01B21/042
    • A method of and apparatus for dynamically calibrating a machine are disclosed in which a laser interferometer is provided in addition to the machine scales for taking independent measurements of a movement of a machine part while the part is in motion. As the moving machine part reaches pre-determined distances along its movement (e.g. every inch) the readings of the interferometer and the machine scales relating to the movement of the machine part are recorded and compared. Any difference is recorded for use in mapping the machine errors. In the preferred form of the invention a reflector is mounted on the machine spindle adjacent to, or in place of, a tool or measuring probe, and its movements are measured by the interferometer. The interferometer is arranged to generate a signal as each predetermined distance is reached and an infra-red signal is transmitted from the interferometer to a receiver on the machine spindle which is wired into the probe or tool detection circuits. This signal initiates reading of the machine scales in the same manner as the probe would normally operate. In this way not only can physical errors in the machine movement be corrected but time delays in the electrical signalling system can be allowed for.
    • PCT No.PCT / GB88 / 00167 Sec。 371日期:1988年10月25日第 102(e)日期1988年10月25日PCT提交1988年3月7日PCT公布。 出版物WO88 / 06714 公开了一种用于动态校准机器的方法和装置,其中除了机器秤之外还提供激光干涉仪,以在部件运动时对机器部件的运动进行独立测量。 随着移动机器部件沿其移动(例如每英寸)达到预定距离,记录和比较干涉仪的读数和与机器部件的移动相关的机器尺寸。 记录任何差异用于映射机器错误。 在本发明的优选形式中,反射器安装在机器主轴上邻近或代替工具或测量探针,并且其运动由干涉仪测量。 干涉仪布置成当达到每个预定距离时产生信号,并且将红外信号从干涉仪传输到连接到探针或工具检测电路中的机器主轴上的接收器。 该信号以与探头正常工作相同的方式启动机器刻度的读数。 以这种方式,不仅可以校正机器运动中的物理错误,而且可以允许电信号系统中的时间延迟。
    • 2. 发明授权
    • Apparatus for producing and guiding a light beam
    • 用于制造和引导光束的装置
    • US06597505B1
    • 2003-07-22
    • US09700198
    • 2000-11-13
    • Raymond J ChaneyMark A V ChapmanTingdi LiaoJan LinnenbuergerDamon M Northeast
    • Raymond J ChaneyMark A V ChapmanTingdi LiaoJan LinnenbuergerDamon M Northeast
    • G02B530
    • G01B9/02007G01B9/02021G01B9/02058G01B9/02067G01B2290/70G02B6/4207G02B6/4216
    • Apparatus for producing and guiding a light beam, in particular for a laser interferometer, includes a laser having a laser tube (100) and an external cavity (112). Two laser beams (110A′ and 110B′) of orthogonal polarization states are directed from the cavity into polarization maintaining fibers (12, 14). The two beams are generated from a single beam (110) by a birefringent prism (120) in the cavity. Additional beam steering prisms (130A and 130B) are included to direct the beams from the birefringent prism to the fibers. The additional steering prisms compensate for temperature induced beam deviations in the birefringent prisms. Interferometric sensing heads (20, 22) receive the beams from the fibers and include a rotatable wedge prism and mechanical adjustment means for guiding the beams onto reflecting surfaces on an object for positioning the object. The ends of the fibers attached to the sensing heads are kinematically located in the head.
    • 用于产生和引导光束,特别是用于激光干涉仪的设备包括具有激光管(100)和外部空腔(112)的激光器。 正交极化状态的两个激光束(110A'和110B')从空腔引导到偏振保持光纤(12,14)中。 两个光束通过空腔中的双折射棱镜(120)由单个光束(110)产生。 包括附加的光束导向棱镜(130A和130B)以将光束从双折射棱镜引导到光纤。 附加的转向棱镜补偿双折射棱镜中的温度感应光束偏差。 干涉测量头(20,22)从光纤接收光束并且包括可旋转的楔形棱镜和用于将光束引导到用于定位物体的物体上的反射表面上的机械调节装置。 附着在感测头上的纤维的端部运动地位于头部。
    • 6. 发明授权
    • Beam deflector
    • 梁偏转器
    • US06473250B1
    • 2002-10-29
    • US09380703
    • 1999-09-15
    • Mark A V ChapmanTingdi Liao
    • Mark A V ChapmanTingdi Liao
    • G02B504
    • G02B26/0883
    • A beam deflector has first and second wedge prisms having refractive indices and geometries which are similar (in the case of the geometry to within arc minutes). The prisms are rotatable about an optical axis O defined by the direction of propagation of the incident light beam, to adjust the angle through which the incident beam is deflected. A third prism has a wedge angle which is greater than that of the first and second prisms by a factor of 2. When the directions in which the first and second prisms refract the beam away from the optical axis are aligned about the optical axis at notional angles of 0° and 90° respectively, and the third prism is aligned with its direction of refractive deviation at a notional angle of 225° about the optical axis, the light beam will pass undeviated through the deflecting device. The provision of the third prism ameliorates the need to match closely the geometries and refractive indices of the first and second prisms, and yet avoids the occurrence of angles through which the beam may not be deflected as a result of insufficiently closely matched prisms.
    • 光束偏转器具有第一和第二楔形棱镜,其具有类似的折射率和几何形状(在几何形状的情况下在弧分钟内)。 棱镜可以围绕由入射光束的传播方向限定的光轴O旋转,以调节入射光束偏转的角度。 第三棱镜具有比第一和第二棱镜的楔形角大2倍的楔角。当第一和第二棱镜将光束远离光轴折射的方向以名义上的光轴对齐时 角度分别为0°和90°,并且第三棱镜与其光轴的225°方向的折射偏离方向对准,光束将通过偏转装置未透射。 提供第三棱镜改善了与第一和第二棱镜的几何形状和折射率紧密匹配的需要,并且避免了由于不完全匹配的棱镜而不能偏转光束的角度的出现。