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公开(公告)号：US5714832A
公开(公告)日：1998-02-03
申请号：US616899
申请日：1996-03-15
CPC分类号： H02N2/02 , A61B1/227 , G01B11/2527 , H01L41/094
摘要： A miniature grating drive device (216) for accurately and precisely positioning a grating (236) of a projection Moire topography measurement system where the Moire topography measurement system is included as part of a hand-held medical instrument for providing surface measurements of inaccessible living membranes. The drive device (216) includes two separate piezoelectric bimorph actuators (248, 256) for positioning the grating (236) at three precise locations. The first piezoelectric bimorph actuator (256) accurately positions the grating (236) at a first location, and the second piezoelectric bimorph (248) actuator accurately positions a base (232) on which the first piezoelectric actuator (256) is attached to move the grating (236) to a second location.
摘要翻译： 一种微型光栅驱动装置（216），用于精确和精确地定位投影Moir + E，acu e + EE地形测量系统的光栅（236），其中包括Moir + E，acu e + EE地形测量系统，作为 一种用于提供难以接近的活膜的表面测量的手持式医疗仪器。 驱动装置（216）包括用于将光栅（236）定位在三个精确位置的两个分离的压电双压电晶片致动器（248,256）。 第一压电双压电晶片致动器（256）将光栅（236）精确地定位在第一位置，并且第二压电双压电晶片（248）致动器精确地定位附接有第一压电致动器（256）的基座（232） 光栅（236）到第二位置。
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公开(公告)号：US5621514A
公开(公告)日：1997-04-15
申请号：US369023
申请日：1995-01-05
CPC分类号： G01S17/936 , B60T7/22 , G01P3/36 , G01S17/58 , G01S7/483
摘要： An laser radar system employing transmitted random and pseudo random optical pulse trains and signal processing that provides unambiguous range and Doppler velocity data. The system comprises a diode-pumped fiber laser local oscillator and an optical random pulse signal generator comprising a mode-locked fiber laser source for generating and transmitted randomly spaced optical pulses. A heterodyne output pulse monitor processes the local oscillator signals and samples the transmitted optical pulses. A heterodyne receiver detector processes the local oscillator signals and received optical pulses reflected from a target. An acoustic charge transport delay line provides a selectable signal delay for the signal provided by the heterodyne optical pulse monitor, and a mixer mixes signals provided by the heterodyne receiver detector and delay line and provides correlation output signals. A Doppler analyzer processes the correlation output signals from the mixer to provide frequency spectrum for each range bin, and an executive processor processes the frequency spectra from the Doppler analyzer to provide a range-resolved Doppler image on the display. The range-resolved Doppler output signals provided by the executive processor allow identification of a wideband weather signature and a narrow band target signature that are displayed on the display. The system employs a single waveform to provide the needed measurements, and eliminates trade-offs between range and velocity ambiguities. The present invention may be employed in vehicular collision avoidance radars and laser sensors, and in adaptive cruise control, robotic vision, and metrology-gauging applications.
摘要翻译： 一种采用传输的随机和伪随机光脉冲串和信号处理的激光雷达系统，提供无歧义的范围和多普勒速度数据。 该系统包括二极管泵浦光纤激光器本地振荡器和光学随机脉冲信号发生器，其包括用于产生和传输随机间隔的光脉冲的锁模光纤激光源。 外差输出脉冲监视器处理本地振荡器信号并对所发送的光脉冲进行采样。 外差接收机检测器处理本地振荡器信号和从目标反射的接收的光脉冲。 声电荷传输延迟线为外差光脉冲监视器提供的信号提供可选择的信号延迟，并且混频器将由外差接收器检测器和延迟线提供的信号混合并提供相关输出信号。 多普勒分析器处理来自混频器的相关输出信号以提供每个范围仓的频谱，并且执行处理器处理来自多普勒分析仪的频谱，以在显示器上提供范围分辨的多普勒图像。 由执行处理器提供的范围分辨多普勒输出信号允许识别在显示器上显示的宽带天气特征和窄带目标签名。 该系统采用单个波形来提供所需的测量，并消除范围和速度模糊度之间的权衡。 本发明可用于车辆避碰雷达和激光传感器，以及自适应巡航控制，机器人视觉和计量测量应用中。
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公开(公告)号：US5847832A
公开(公告)日：1998-12-08
申请号：US616898
申请日：1996-03-15
CPC分类号： A61B5/0064 , A61B5/1077 , G01B11/2527
摘要： A hand-held instrument (10) and associated method for providing optical measurements of the contour, range and motion of an object, such as a tympanic membrane of an ear, in real time, and to provide for simultaneous visualization of the object. The instrument (10) includes an illumination source (22) that projects an optical beam (24) through a grating (26) onto a gradient of refractive index lens (32) to project light and dark fringes onto the object at stepped phases determined by the grating position. Light reflected from the object is collected and focused onto an eye piece (18) to be observed by the operator. Simultaneously, reflected light from the object is focused onto a camera (46). The camera (46) generates an electrical signal in proportion to the light intensity received by the camera (46) to generate an image of the object. The image is then transmitted to processing systems to compute phase relationships in the reflected grating image to generate a contour map of the object. A drive system (28) is provided to move the grating (26) to different positions at a fraction of the spatial period of the grating during a measurement to provide phase sensitivity, eliminate reflectivity variations and reduce background noise.
摘要翻译： 一种手持式仪器（10）和用于实时地提供物体（例如耳朵的鼓膜）的轮廓，范围和运动的光学测量的相关方法，并且提供对象的同时可视化。 仪器（10）包括照射源（22），其将光束（24）通过光栅（26）投影到折射率透镜（32）的梯度上，以将光和黑条纹投射到物体上，阶梯相位由 光栅位置。 从物体反射的光被收集并聚焦到眼睛片（18）上以由操作者观察。 同时，来自物体的反射光聚焦到相机（46）上。 相机（46）产生与照相机（46）接收的光强成比例的电信号，以生成对象的图像。 然后将图像传输到处理系统以计算反射光栅图像中的相位关系，以生成对象的轮廓图。 提供驱动系统（28）以在测量期间将光栅（26）移动到光栅的空间周期的一小部分的不同位置，以提供相位灵敏度，消除反射率变化并降低背景噪声。
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