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1. 发明申请

US20070091316A1 Multi-beam heterodyne laser doppler vibrometer 有权
标题翻译：多波束外差激光多普勒振动计
公开(公告)号：US20070091316A1
公开(公告)日：2007-04-26
申请号：US11507882
申请日：2006-08-21
申请人： Amit Lal , Cecil Hess , L. Hurtado , Vladimir Markov , Vyacheslav Aranchuk , Valentina Doushkina
发明人： Amit Lal , Cecil Hess , L. Hurtado , Vladimir Markov , Vyacheslav Aranchuk , Valentina Doushkina
IPC分类号： G01B9/02
CPC分类号： G01B9/02019 , G01B9/02002 , G01B9/02023 , G01B9/02027 , G01B9/02045 , G01B2290/70 , G01H9/002
摘要： A multi-beam heterodyne vibrometer for analyzing vibration of an object includes an optical system and a combining element. The optical system generates a plurality of object beams and a plurality of reference beams where one of the plurality of beams has a frequency that is shifted from a frequency of the other plurality of beams. The optical system focuses each of the plurality of object beams on the object and transmits the plurality of focused object beams to the object. A portion of each of the plurality of focused object beams is reflected off of a surface of the object as a modulated object beam. The optical system collects the modulated object beams. The combining element combines each of the modulated object beams with a respective one of the reference beams into a plurality of beam pairs.
摘要翻译：用于分析物体振动的多光束外差振动计包括光学系统和组合元件。光学系统产生多个物体光束和多个参考光束，其中多个光束中的一个光束具有从其它多个光束的频率偏移的频率。光学系统将多个物体光束中的每一个聚焦在物体上，并将多个聚焦物体光束发射到物体。多个聚焦物体光束中的每一个的一部分作为调制对象光束从物体的表面反射。光学系统收集被调制物体光束。组合元件将每个调制对象光束与相应的一个参考光束组合成多个光束对。

2. 发明授权

US4537507A Dual beam maximum intensity laser sizing system 失效
标题翻译：双光束最大强度激光定尺系统
公开(公告)号：US4537507A
公开(公告)日：1985-08-27
申请号：US434905
申请日：1982-10-18
申请人： Cecil Hess
发明人： Cecil Hess
IPC分类号： G01N15/02 , G01N15/14
CPC分类号： G01N15/0205 , G01N2015/145
摘要： An apparatus and method for determining the size and velocity of particles, droplets and the like is disclosed. Laser beams of the same wavelength having different diameters are caused to cross and form an interference pattern. The scattered light caused by particles, droplets or the like passing through the interference pattern is sensed by a collection means. The scattered signal is passed through a high pass filtering means to isolate Doppler (AC) components, and a low pass filtering means to isolate a DC pedestal signal. The AC signal is processed to provide the velocity, and the DC signal is processed to provide the size of the particle, droplet or the like. The position of the AC Doppler components in the scattered signal indicates the position of the particle in the cross-section of the larger diameter beam.
摘要翻译：公开了一种用于确定颗粒，液滴等的尺寸和速度的装置和方法。使具有不同直径的相同波长的激光束交叉并形成干涉图案。由通过干涉图案的颗粒，液滴等引起的散射光由收集装置感测。散射信号通过高通滤波装置以隔离多普勒（AC）分量，以及低通滤波装置来隔离DC基座信号。处理AC信号以提供速度，并处理DC信号以提供颗粒，液滴等的尺寸。散射信号中的交流多普勒分量的位置表示粒子在较大直径光束的横截面中的位置。

3. 发明申请

US20060055937A1 Multi-beam heterodyne laser Doppler vibrometer 有权
标题翻译：多波束外差激光多普勒振动计
公开(公告)号：US20060055937A1
公开(公告)日：2006-03-16
申请号：US11262707
申请日：2005-10-31
申请人： Amit Lal , Cecil Hess , Hansheng Zhang , L. Hurtado , Vladimir Markov , Vyacheslav Aranchuk
发明人： Amit Lal , Cecil Hess , Hansheng Zhang , L. Hurtado , Vladimir Markov , Vyacheslav Aranchuk
IPC分类号： G01B9/02
CPC分类号： G01H9/00
摘要： A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.
摘要翻译：多光束激光多普勒振动计同时测量物体上多个位置的速度，位移和振动历史。相干光束被分裂成物体光束和参考光束。物体光束被分成多个物体光束，以同时照射被检查物体上的多个位置。参考光束被频移并且分成相应的多个频移参考光束。每个物体光束的一部分被物体反射为被调制物体光束。多个调制对象光束被收集并分别与多个频移参考光束混合以提供多个光束对。每个光束对可以聚焦到连接到光电检测器的光电检测器或光纤上。

4. 发明申请

US20050237533A1 MULTI-BEAM HETERODYNE LASER DOPPLER VIBROMETER 有权
标题翻译：多波长多孔激光多普勒振荡器
公开(公告)号：US20050237533A1
公开(公告)日：2005-10-27
申请号：US10405045
申请日：2003-03-31
申请人： Amit Lal , Cecil Hess , Hansheng Zhang , L. Hurtado , Vladimir Markov , Vyacheslav Aranchuk
发明人： Amit Lal , Cecil Hess , Hansheng Zhang , L. Hurtado , Vladimir Markov , Vyacheslav Aranchuk
IPC分类号： G01B9/02 , G01H9/00
CPC分类号： G01H9/00
摘要： A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.
摘要翻译：多光束激光多普勒振动计同时测量物体上多个位置的速度，位移和振动历史。相干光束被分裂成物体光束和参考光束。物体光束被分成多个物体光束，以同时照射被检查物体上的多个位置。参考光束被频移并且分成相应的多个频移参考光束。每个物体光束的一部分被物体反射为被调制物体光束。多个调制对象光束被收集并分别与多个频移参考光束混合以提供多个光束对。每个光束对可以聚焦到连接到光电检测器的光电检测器或光纤上。

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