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公开(公告)号：US6002706A
公开(公告)日：1999-12-14
申请号：US1231
申请日：1997-12-30
CPC分类号： G01J11/00 , B23K26/702
摘要： A method of controlling the size of a laser beam comprises the steps of generating the laser beam with a laser, focusing the laser beam, directing the laser beam to a target, directing a portion of the laser beam to an optical detector which generates a signal representative of a fluence distribution of the laser beam, and adjusting a focal point of the laser beam based on the measured fluence distribution to control the size of the laser beam on the target. The method can be carried out with an apparatus which comprises a beam splitter which divides the laser beam into a first portion and a second portion, a lens which focuses the first portion of the laser beam for incidence on a target, a detector which receives the second portion of the laser beam and which generates a signal representative of a spatial energy distribution of the laser beam, a digitizer which digitizes the signal from the detector, a data analyzer which receives the digitized signal from the digitizer and which calculates a fluence distribution of the laser beam, and a lens controller for adjusting a position of the lens with respect to the target based on the fluence distribution.
摘要翻译： 控制激光束尺寸的方法包括以下步骤：用激光产生激光束，聚焦激光束，将激光束引导到目标，将激光束的一部分引导到产生信号的光学检测器 代表激光束的注量分布，以及基于所测量的通量分布来调整激光束的焦点，以控制激光束在靶上的尺寸。 该方法可以用包括将激光束分成第一部分和第二部分的分束器的装置进行，将聚焦激光束的第一部分以将其入射到目标上的透镜，接收 激光束的第二部分，并且其产生表示激光束的空间能量分布的信号，数字化仪，其将来自检测器的信号数字化;数据分析器，其从数字化仪接收数字化信号，并且计算数字化分布 激光束和用于基于注量分布来调整透镜相对于目标的位置的透镜控制器。
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公开(公告)号：US06197133B1
公开(公告)日：2001-03-06
申请号：US09252620
申请日：1999-02-16
IPC分类号： C21D109
CPC分类号： C21D10/005 , B23K26/0622
摘要： A target is laser shock peened by directing against an ablative coating thereon a laser beam pulse having a fluence, duration, and corresponding peak power effective for ablating the coating to form a plasma and shock wave therein. The plasma is confined adjacent the target to plastically deform the target by the shock wave to develop residual compressive stress therein. The pulse has a duration less than ten nanoseconds and a corresponding peak power for increasing coupling efficiency between the pulse and plasma.
摘要翻译： 目标是通过对其上的烧蚀涂层进行激光冲击而进行激光冲击，激光束脉冲具有有效用于消融涂层以在其中形成等离子体和冲击波的注量，持续时间和相应的峰值功率。 等离子体被限制在目标附近，通过冲击波使靶材塑性变形，从而在其中形成残留压应力。 脉冲具有小于10纳秒的持续时间和用于提高脉冲和等离子体之间的耦合效率的相应的峰值功率。
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公开(公告)号：US06670577B2
公开(公告)日：2003-12-30
申请号：US09965320
申请日：2001-09-28
申请人： Phillip Randall Staver , William Taylor Lotshaw , Michael Francis X Gigliotti, Jr. , Josef Robert Unternahrer , Robert Snee Gilmore , Thomas James Batzinger
发明人： Phillip Randall Staver , William Taylor Lotshaw , Michael Francis X Gigliotti, Jr. , Josef Robert Unternahrer , Robert Snee Gilmore , Thomas James Batzinger
IPC分类号： B23K2600
CPC分类号： C21D10/005 , B23K26/0619 , B23K26/067
摘要： A method for laser shock peening a surface is disclosed. A laser beam pulse from a laser apparatus is produced. The laser pulse has a cross-section taken perpendicular to the laser beam, a fluence profile across the cross-section. The pulse against an area on said surface. The fluence profile is controlled such that process induced defects are reduced.
摘要翻译： 公开了一种激光冲击硬化表面的方法。 产生来自激光装置的激光束脉冲。 激光脉冲具有垂直于激光束的横截面，横截面上的注量分布。 针对所述表面上的区域的脉冲。 控制注量分布，从而减少工艺引起的缺陷。
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公开(公告)号：US5987042A
公开(公告)日：1999-11-16
申请号：US961584
申请日：1997-10-31
CPC分类号： H01S3/0057 , B23K26/0069 , B23K26/0622
摘要： The invention relates to a method and apparatus for shaping a laser pulse. The method comprises the steps of generating a laser pulse with a laser, opening an optical switch to allow the laser pulse to pass through the optical switch, determining a first reference time point with respect to the laser pulse, determining a second reference time point with respect to the opening of the optical switch, and adjusting an opening time of the optical switch based on the first and second reference time points to shape the laser pulse. The method may be carried out with an apparatus which comprises a laser which generates the laser pulse, a first optical detector which detects the laser pulse and generates a first signal representing the laser pulse, an optical switch through which the laser pulse passes, a second optical detector which detects the laser pulse after the laser pulse has passed through the optical switch, and which generates a second signal representing the laser pulse, a computer which receives the first and second signals and which calculates a delay period based on the first and second signals, and a pulse generator which receives the delay period from the computer and which generates a pulse delayed by the delay period to open the optical switch.
摘要翻译： 本发明涉及一种用于整形激光脉冲的方法和装置。 该方法包括以下步骤：用激光产生激光脉冲，打开光学开关以允许激光脉冲通过光学开关，确定相对于激光脉冲的第一参考时间点，确定第二参考时间点与 相对于光开关的打开，以及基于第一和第二参考时间点调整光开关的打开时间，以形成激光脉冲。 该方法可以由包括产生激光脉冲的激光器的装置，检测激光脉冲并产生表示激光脉冲的第一信号的第一光学检测器，激光脉冲通过的光开关，第二 光检测器，其在激光脉冲通过光开关之后检测激光脉冲，并且产生表示激光脉冲的第二信号;计算机，其接收第一和第二信号，并且基于第一和第二信号计算延迟周期 信号和脉冲发生器，其从计算机接收延迟周期，并产生延迟延迟周期的脉冲以打开光开关。
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公开(公告)号：US5980101A
公开(公告)日：1999-11-09
申请号：US961692
申请日：1997-10-31
CPC分类号： G01K17/003 , B23K26/0069 , B23K26/705
摘要： The invention relates to a method and apparatus for accurately measuring the energy of a laser pulse. The method according to one embodiment comprises directing a first laser pulse to an energy sensor which produces a first signal responsive to the first laser pulse, determining a time constant of the energy sensor based on the first signal, directing a second laser pulse to the energy sensor which produces a second signal responsive to the second laser pulse, and determining the pulse energy of the second laser pulse based on the second signal and the time constant. The method may be carried out with an apparatus which comprises an energy sensor which receives a laser beam and generates a signal responsive to the laser beam, a digitizer which digitizes the signal, and a computer which calculates a time constant of the energy detector based on the digitized signal of the first laser pulse incident on the energy detector and calculates an energy of a second laser pulse based on the digitized signal of the second laser pulse and the time constant. The method and apparatus provide accurate and timely energy measurements which can be used to improve the laser shock peening process.
摘要翻译： 本发明涉及一种用于精确测量激光脉冲能量的方法和装置。 根据一个实施例的方法包括将第一激光脉冲引导到能量传感器，该能量传感器响应于第一激光脉冲产生第一信号，基于第一信号确定能量传感器的时间常数，将第二激光脉冲引导到能量 传感器，其响应于第二激光脉冲产生第二信号，以及基于第二信号和时间常数确定第二激光脉冲的脉冲能量。 该方法可以使用包括接收激光束并产生响应于激光束的信号的能量传感器的装置，数字化数字化信号的计算机以及计算能量检测器的时间常数的计算机 入射到能量检测器上的第一激光脉冲的数字化信号，并且基于第二激光脉冲的数字化信号和时间常数来计算第二激光脉冲的能量。 该方法和装置提供准确和及时的能量测量，可用于改善激光冲击喷丸处理。
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公开(公告)号：US07148448B2
公开(公告)日：2006-12-12
申请号：US10700063
申请日：2003-10-31
IPC分类号： B23K26/02
CPC分类号： B23K26/032 , B23K26/009 , B23K26/03 , B23K26/18 , C21D10/005
摘要： A pulse laser is configured for projecting a pulsed laser beam at a target site on a fluid film atop a workpiece for laser shock peening the workpiece. The fluid film is monitored by a probe laser which projects a probe laser beam at the target site, and an optical detector which detects reflection of the probe beam from the target site. The pulse laser is coordinated by the detector in order to emit the pulsed beam in response to the condition of the monitored film.
摘要翻译： 脉冲激光器被配置为将脉冲激光束投射在工件上方的流体膜上的目标部位上，以对激光冲击加工工件。 流体膜通过探针激光器监测，该探针激光器将探测激光束投射在目标位置，以及光学检测器，其检测来自目标位置的探测光束的反射。 脉冲激光由检测器协调，以便响应于被监视的膜的状况发射脉冲束。
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公开(公告)号：US20100231855A1
公开(公告)日：2010-09-16
申请号：US12799503
申请日：2010-04-26
CPC分类号： G06K9/0061 , A61B3/0025 , A61F2/147 , A61F9/007 , A61F9/013 , G02C2202/22 , G06F19/00 , G06F19/3481 , G16H10/60 , G16H40/63
摘要： The present disclosure provides systems and methods for diagnosing and treating subjects using neuro-ocular wavefront data. As such, in some embodiments, among others, neuro-ocular wavefront data is obtained, and one or more characteristics of a visual system are ascertained from the neuro-ocular wavefront data.
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公开(公告)号：US5801312A
公开(公告)日：1998-09-01
申请号：US627670
申请日：1996-04-01
CPC分类号： G01S15/8965 , G01N29/069 , G01N29/2418 , G01N2291/0421 , G01N2291/0422 , G01N2291/044
摘要： The present invention discloses a method and system for laser ultrasonic imaging an object. In the present invention, a synthetic aperture focusing technique (SAFT) is used to generate a high resolution subsurface images of the object. In addition, the present invention filters low frequency components from detected laser ultrasound waveform data to further enhance resolution, SNR, and contrast. Geometric knowledge permits the present invention to generate images of objects having a complex and arbitrary-shape.
摘要翻译： 本发明公开了一种用于激光超声成像的方法和系统。 在本发明中，使用合成孔径聚焦技术（SAFT）来生成物体的高分辨率地下图像。 此外，本发明从检测到的激光超声波数据中滤出低频分量，以进一步提高分辨率，SNR和对比度。 几何知识允许本发明产生具有复杂和任意形状的物体的图像。
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公开(公告)号：US5689331A
公开(公告)日：1997-11-18
申请号：US569889
申请日：1995-12-08
CPC分类号： G01D5/26
摘要： A laser apparatus includes a laser for emitting a laser beam which is reflected from a primary mirror through a primary lens in a primary optical path and focused at a primary spot. A portion of the laser beam leaks through a back face of the mirror and is directed through a reference lens and focused at a reference spot in a reference optical path. Angular wander of the laser beam on the primary mirror is corrected by measuring the lateral position of the reference spot and adjusting the primary optical path to decrease lateral wander of the primary spot.
摘要翻译： 激光装置包括：激光器，用于发射激光束，该激光束从初级反射镜通过初级光路中的主透镜反射并聚焦在主光点。 激光束的一部分通过反射镜的背面泄漏并且被引导通过参考透镜并聚焦在参考光路中的参考点。 通过测量参考点的横向位置并调整主光路以减少主光斑的横向漂移来校正激光束在主镜上的角度漂移。
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公开(公告)号：US5659415A
公开(公告)日：1997-08-19
申请号：US605417
申请日：1996-02-22
CPC分类号： G02F1/293 , G02F1/3515
摘要： An optical modulator includes pump and signal lasers optically aligned with an optical modulator element having a nonlinear refractive index. In operation, a pulsed optical pump beam is focused inside the modulator element for obtaining oscillatory sagittal and tangential mode radii thereof. A signal beam is propagated through the focus in the modulator element at a crossing angle with the spatially modulated pump beam for phase modulation thereof. Material nonlinearity due to electronic polarization or molecular orientation provides ultrafast rise times with correspondingly high modulation bandwidth.
摘要翻译： 光调制器包括与具有非线性折射率的光调制器元件光学对准的泵浦和信号激光器。 在操作中，脉冲光泵浦光束聚焦在调制器元件内部，以获得其摆动矢状和切向模式半径。 信号光束通过调制器元件中的焦点以与空间调制的泵浦光束交叉的角度传播，用于其相位调制。 由于电子极化或分子取向引起的材料非线性提供超快的上升时间和相应的高调制带宽。
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