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公开(公告)号：US08064488B2
公开(公告)日：2011-11-22
申请号：US12120949
申请日：2008-05-15
IPC分类号： H01S3/30
CPC分类号： G01N21/1702 , G01N2021/1706 , G01N2021/8472
摘要： A compact high average power mid infrared range laser for ultrasound inspection. The laser comprises one of a Nd:YAG or Yb:YAG laser pumped by a diode at 808 nm to produce a 1 micron output beam. The 1 micron output beam is directed to an optical parametric oscillator where the beam wavelength is converted to 1.94 microns and conveyed to a mid infrared emission head. The emission head comprises one of a Ho:YAG or Ho:YLG laser optically coupled with a second optical parametric oscillator. The second optical parametric oscillator forms a generation output beam for creating ultrasonic displacements on a target. The generation output beam wavelength ranges from about 3 to about 4 microns, and can be 3.2 microns.
摘要翻译： 用于超声检查的紧凑型高平均功率中红外范围激光。 激光器包括由二极管在808nm泵浦的Nd：YAG或Yb：YAG激光器中的一个，以产生1微米的输出光束。 1微米输出光束被引导到光学参数振荡器，其中波束波长被转换为1.94微米并被传送到中红外发射头。 发射头包括与第二光学参量振荡器光学耦合的Ho：YAG或Ho：YLG激光器之一。 第二光参量振荡器形成用于在目标上产生超声波位移的生成输出光束。 产生输出光束波长范围为约3至约4微米，并且可以为3.2微米。
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2.发明授权Method and apparatus for spectroscopic characterization of samples using a laser-ultrasound system 有权使用激光超声系统对样品进行光谱表征的方法和装置公开(公告)号：US08054470B2
公开(公告)日：2011-11-08
申请号：US12120907
申请日：2008-05-15
IPC分类号： G01B9/02
CPC分类号： G01N29/2418 , G01N29/12 , G01N29/4409 , G01N2291/0231 , G01N2291/2694
摘要： A method of spectroscopic analysis of a material using a laser ultrasound system. The method includes measuring amplitude displacement of a target surface that has been excited with a generation laser. The amplitude displacements relate to the target's optical absorption properties. Amplitude displacements are generated over a range of laser wavelengths to obtain an optical absorption signature useful to identify the target material characteristics.
摘要翻译： 使用激光超声系统对材料进行光谱分析的方法。 该方法包括测量已经用发生激光器激发的目标表面的振幅位移。 振幅位移与目标的光吸收特性有关。 在激光波长范围内产生幅度位移以获得用于识别目标材料特性的光学吸收特征。
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3.发明授权Method and apparatus for generating mid-IR laser beam for ultrasound inspection 有权用于生成用于超声检查的中红外激光束的方法和装置公开(公告)号：US07821646B2
公开(公告)日：2010-10-26
申请号：US12120823
申请日：2008-05-15
IPC分类号： G01B9/02
CPC分类号： G01N21/1702 , G01N21/8806 , G01N29/2418 , G01N2021/1706 , G01N2021/8472
摘要： A method of ultrasonic testing comprising conditioning a radiation wave from a laser source by efficiently converting the radiation wave's wavelength to a mid-IR wavelength for enhanced ultrasonic testing of a composite. The method includes passing the radiation wave through a first optical frequency converter where the radiation wave is converted into a signal wave and an idler wave, where the idler wave is at a mid-IR wavelength. The method further includes directing the signal and idler waves to a second optical frequency converter where the signal wave wavelength is converted to a mid-IR wavelength which combines with the idler wave to form a generation wave. The generation wave is directed at a composite surface to be tested.
摘要翻译： 一种超声波测试方法，包括通过有效地将辐射波的波长转换成中红外波长来调节来自激光源的辐射波，以增强复合材料的超声波测试。 该方法包括使辐射波通过第一光学频率转换器，其中辐射波被转换成信号波和惰轮，其中惰轮是中红外波长。 该方法还包括将信号和惰轮引导到第二光学频率转换器，其中信号波长被转换成与惰轮相结合以形成发电波的中红外波长。 发电波指向要测试的复合表面。
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4.发明申请METHOD AND APPARATUS FOR SPECTROSCOPIC CHARACTERIZATION OF SAMPLES USING A LASER-ULTRASOUND SYSTEM 有权使用激光超声系统对样品的光谱特征的方法和装置公开(公告)号：US20090284752A1
公开(公告)日：2009-11-19
申请号：US12120907
申请日：2008-05-15
IPC分类号： G01B9/02
CPC分类号： G01N29/2418 , G01N29/12 , G01N29/4409 , G01N2291/0231 , G01N2291/2694
摘要： A method of spectroscopic analysis of a material using a laser ultrasound system. The method includes measuring amplitude displacement of a target surface that has been excited with a generation laser. The amplitude displacements relate to the target's optical absorption properties. Amplitude displacements are generated over a range of laser wavelengths to obtain an optical absorption signature useful to identify the target material characteristics.
摘要翻译： 使用激光超声系统对材料进行光谱分析的方法。 该方法包括测量已经用发生激光器激发的目标表面的振幅位移。 振幅位移与目标的光吸收特性有关。 在激光波长范围内产生幅度位移以获得用于识别目标材料特性的光学吸收特征。
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5.发明申请METHOD AND APPARATUS FOR GENERATING MID-IR LASER FOR ULTRASOUND INSPECTION 有权用于生成用于超声波检测的中红外激光的方法和装置公开(公告)号：US20090284751A1
公开(公告)日：2009-11-19
申请号：US12120823
申请日：2008-05-15
CPC分类号： G01N21/1702 , G01N21/8806 , G01N29/2418 , G01N2021/1706 , G01N2021/8472
摘要： A method of ultrasonic testing comprising conditioning a radiation wave from a laser source by efficiently converting the radiation wave's wavelength to a mid-IR wavelength for enhanced ultrasonic testing of a composite. The method includes passing the radiation wave through a first optical frequency converter where the radiation wave is converted into a signal wave and an idler wave, where the idler wave is at a mid-IR wavelength. The method further includes directing the signal and idler waves to a second optical frequency converter where the signal wave wavelength is converted to a mid-IR wavelength which combines with the idler wave to form a generation wave. The generation wave is directed at a composite surface to be tested.
摘要翻译： 一种超声波测试方法，包括通过有效地将辐射波的波长转换成中红外波长来调节来自激光源的辐射波，以增强复合材料的超声波测试。 该方法包括使辐射波通过第一光学频率转换器，其中辐射波被转换成信号波和惰轮，其中惰轮是中红外波长。 该方法还包括将信号和惰轮引导到第二光学频率转换器，其中信号波长被转换成与惰轮相结合以形成发电波的中红外波长。 发电波指向要测试的复合表面。
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6.发明授权Mid-IR laser for generation of ultrasound using a CO2 laser and harmonic generation 有权用于使用CO2激光器和谐波发生产生超声的中红外激光器公开(公告)号：US08113056B2
公开(公告)日：2012-02-14
申请号：US12121012
申请日：2008-05-15
CPC分类号： G01N29/2418 , G01N21/1702 , G01N2021/1706
摘要： A mid infrared range laser source for ultrasound inspection having a high energy laser coupled with one or more harmonic generation devices. The high energy laser may be a CO2 laser and tuned to emit laser light at a single wavelength. The harmonic generation devices convert the laser beam into the mid infrared range for optimal ultrasound inspection.
摘要翻译： 用于超声检查的中红外范围激光源，其具有与一个或多个谐波发生器件耦合的高能量激光器。 高能激光器可以是CO 2激光器并被调谐以在单个波长处发射激光。 谐波发生装置将激光束转换为中红外范围，以实现最佳超声检查。
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公开(公告)号：US20090285244A1
公开(公告)日：2009-11-19
申请号：US12120949
申请日：2008-05-15
IPC分类号： H01S3/30
CPC分类号： G01N21/1702 , G01N2021/1706 , G01N2021/8472
摘要： A compact high average power mid infrared range laser for ultrasound inspection. The laser comprises one of a Nd:YAG or Yb:YAG laser pumped by a diode at 808 nm to produce a 1 micron output beam. The 1 micron output beam is directed to an optical parametric oscillator where the beam wavelength is converted to 1.94 microns and conveyed to a mid infrared emission head. The emission head comprises one of a Ho:YAG or Ho:YLG laser optically coupled with a second optical parametric oscillator. The second optical parametric oscillator forms a generation output beam for creating ultrasonic displacements on a target. The generation output beam wavelength ranges from about 3 to about 4 microns, and can be 3.2 microns.
摘要翻译： 用于超声检查的紧凑型高平均功率中红外范围激光。 激光器包括由二极管在808nm泵浦的Nd：YAG或Yb：YAG激光器中的一个，以产生1微米的输出光束。 1微米输出光束被引导到光参量振荡器，其中光束波长被转换为1.94微米并被传送到中红外发射头。 发射头包括与第二光学参量振荡器光学耦合的Ho：YAG或Ho：YLG激光器之一。 第二光参量振荡器形成用于在目标上产生超声波位移的生成输出光束。 产生输出光束波长范围为约3至约4微米，并且可以为3.2微米。
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8.发明申请MID-IR LASER FOR GENERATION OF ULTRASOUND USING A CO2 LASER AND HARMONIC GENERATION 有权使用二氧化碳激光和谐波生成的超声波发生器的中红外激光公开(公告)号：US20090282919A1
公开(公告)日：2009-11-19
申请号：US12121012
申请日：2008-05-15
IPC分类号： G01N9/04
CPC分类号： G01N29/2418 , G01N21/1702 , G01N2021/1706
摘要： A mid infrared range laser source for ultrasound inspection that comprises a high energy laser coupled with one or more harmonic generation devices. The high energy laser may be a CO2 laser and tuned to emit laser light at a single wavelength. The harmonic generation devices convert the laser beam into the mid infrared range for optimal ultrasound inspection.
摘要翻译： 用于超声检查的中红外范围激光源，其包括与一个或多个谐波发生装置耦合的高能量激光器。 高能激光器可以是CO 2激光器并被调谐以在单个波长处发射激光。 谐波发生装置将激光束转换为中红外范围，以实现最佳超声检查。
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9.发明授权System and method of determining porosity in composite materials using ultrasound 有权使用超声波测定复合材料孔隙度的系统和方法公开(公告)号：US06684701B2
公开(公告)日：2004-02-03
申请号：US09905444
申请日：2001-07-13
申请人： Marc Dubois , John B. Deaton, Jr. , Peter W. Lorraine , Thomas E. Drake, Jr. , Robert J. Filkins
发明人： Marc Dubois , John B. Deaton, Jr. , Peter W. Lorraine , Thomas E. Drake, Jr. , Robert J. Filkins
IPC分类号： G01H100
CPC分类号： G01N29/30 , G01N29/11 , G01N29/2418 , G01N29/449 , G01N29/46 , G01N2291/014 , G01N2291/0231 , G01N2291/0245 , G01N2291/0289 , G01N2291/0421 , G01N2291/044
摘要： The invention provides for ultrasonically measuring the porosity in a sample composite material by accessing only one side of the sample composite material and includes the steps of measuring a sample ultrasonic signal from the sample composite material, normalizing the sample ultrasonic signal relative to the surface echo of the sample composite material, and isolating a sample back-wall echo signal from the sample ultrasonic signal. A sample frequency spectrum of the sample back-wall ultrasonic signal is then determined. Next, the method and system include the steps of measuring a reference ultrasonic signal from a reference composite material, normalizing the reference ultrasonic signal relative to the surface echo of the reference composite material; and isolating a reference back-wall echo signal from the sample ultrasonic signal. A reference frequency spectrum of the reference back-wall ultrasonic signal is then determined. The invention further includes deriving the ultrasonic attenuation of the sample ultrasonic signal as the ratio of the sample frequency spectrum to the reference frequency spectrum over a predetermined frequency range. Comparing the derived ultrasonic attenuation to predetermined attenuation standards permits evaluating the porosity of the sampled composite material.
摘要翻译： 本发明提供了通过仅访问样品复合材料的一侧来超声波测量样品复合材料中的孔隙率，并且包括以下步骤：从样品复合材料测量样品超声波信号，使样品超声信号相对于表面回波归一化 样品复合材料，并从样品超声波信号中分离样品后壁回波信号。 然后确定样品后壁超声波信号的采样频谱。 接下来，该方法和系统包括以下步骤：从参考复合材料测量参考超声波信号，使参考超声信号相对于参考复合材料的表面回波标准化; 并从样本超声波信号隔离参考后壁回波信号。 然后确定参考后壁超声波信号的参考频谱。 本发明还包括将样本超声波信号的超声波衰减导出为在预定频率范围内的采样频谱与参考频谱的比率。 将得到的超声波衰减与预定的衰减标准进行比较，可以评估采样的复合材料的孔隙率。
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10.发明授权System and method to reduce laser noise for improved interferometric laser ultrasound detection 有权减少激光噪声的系统和方法，用于改进干涉激光超声检测公开(公告)号：US07474411B2
公开(公告)日：2009-01-06
申请号：US10703655
申请日：2003-11-07
IPC分类号： G01B9/02
CPC分类号： G01H9/00
摘要： The present invention provides an optical filter assembly that reduces the phase and amplitude noise of a detection laser used to detect ultrasonic displacements. The filtered detection laser is directed to the surface of a remote target. Ultrasonic displacements at the surface scatter the filtered detection laser. Collection optics then gather phase modulated light scattered by the surface and direct the phase modulated light to an optical processor to produce a signal representative of the ultrasonic displacements with an improved SNR. Additional processors may determine the structure of the remote target.
摘要翻译： 本发明提供一种滤光器组件，其减少用于检测超声波位移的检测激光器的相位和幅度噪声。 滤波的检测激光器被引导到远程目标的表面。 表面上的超声波位移散射了滤波的检测激光。 收集光学器件然后收集由表面散射的相位调制光，并将相位调制光引导到光学处理器以产生表示具有改善的SNR的超声波位移的信号。 附加处理器可以确定远程目标的结构。
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