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公开(公告)号：US06327896B1
公开(公告)日：2001-12-11
申请号：US09528955
申请日：2000-03-20
IPC分类号： G01M316
CPC分类号： G01M3/38 , G02F1/0121 , G02F1/113 , G02F1/33 , G02F2203/05
摘要： The present invention is a photo-acoustic leak detection system that detects whether gas is leaking from a component. The system includes multiple beams wherein one beam is not absorbed by the gas and is used as a baseline measurement, while another beam absorbs the gas and emits an increased signal. Upon contact with the gas, an acoustic sensor senses the reaction or lack thereof between the gas and the beams, thereby allowing a signal processor to receive the respective alternating sensor signals after which the processor calculates the difference between the first and second signals to determine whether a leak exists. The photo-acoustic leak detection system also includes a beam combining means which forces the multiple beams to enter an acousto-optic cell at the same location. The acousto-optic cell, in turn, which is controlled by a signal controlling apparatus, sequentially and alternately diffracts the multiple beams at the same predetermined angle. Use of an acousto-optic cell removes the limitations inherent with mechanical parts, which, in turn, increases the sensitivity of the photo-acoustic leak detection system.
摘要翻译： 本发明是检测气体是否从部件泄漏的光声泄漏检测系统。 该系统包括多个光束，其中一个光束不被气体吸收并用作基线测量，而另一个光束吸收气体并发出增加的信号。 在与气体接触时，声学传感器感测到气体和束之间的反应或缺乏，从而允许信号处理器接收相应的交替传感器信号，之后处理器计算第一和第二信号之间的差异，以确定是否 存在泄漏。 光声泄漏检测系统还包括一个束组合装置，其强制多个光束在同一位置进入声光电池。 依次由信号控制装置控制的声光单元顺序并交替地以相同的预定角度衍射多个光束。 使用声光电池消除机械部件固有的限制，这反过来又增加了光声检测系统的灵敏度。
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公开(公告)号：US6089076A
公开(公告)日：2000-07-18
申请号：US156338
申请日：1998-09-18
CPC分类号： G02F1/0121 , G01M3/38 , G02F1/113
摘要： The present invention is a system for controlling the power level of a beam exiting an acousto-optic cell and/or a beam delivery device. A beam detector senses the power level of the beam and produces a power signal indicative thereof. An error detector compares the power signal to a predetermined power level. If the power signal and predetermined power level differ, the error amplifier emits a correction signal to a variable amplitude source, which adjusts the amplitude of the acoustic drive frequency such that the power level of the beam exiting the acousto-optic cell and/or the beam delivery device is substantially equal to the predetermined power level.
摘要翻译： 本发明是一种用于控制离开声光电池和/或光束输送装置的光束的功率电平的系统。 光束检测器检测光束的功率电平并产生指示其的功率信号。 误差检测器将功率信号与预定功率电平进行比较。 如果功率信号和预定功率电平不同，则误差放大器向可变幅度源发射校正信号，该可调幅度源调节声驱动频率的幅度，使得离开声光电池的光束的功率电平和/或 光束输送装置基本上等于预定功率电平。
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公开(公告)号：US6154307A
公开(公告)日：2000-11-28
申请号：US157235
申请日：1998-09-18
CPC分类号： G01M3/38 , G02F1/0121 , G02F1/113 , G02F1/33 , G02F2203/05
摘要： The present invention is a method and apparatus for sequentially and repetitively diffracting multiple beams at a common predetermined angle. A coincident beam source introduces a plurality of coincident beams into an acousto-optic cell at a common location and angle, wherein each beam has a different wavelength. A signal controlling apparatus sequentially and repetitively introduces a series of signals to the acousto-optic cell. Each signal has a frequency, which corresponds to one of the multiple beams such that when the acousto-optic cell receives the signal, the acousto-optic cell operates at such frequency and diffracts the corresponding beam at the predetermined angle.
摘要翻译： 本发明是用于以共同的预定角度顺序地和重复地衍射多个光束的方法和装置。 一致的光束源以公共位置和角度将多个重合光束引入声光电池，其中每个光束具有不同的波长。 信号控制装置顺序并重复地将一系列信号引入声光单元。 每个信号具有对应于多个波束之一的频率，使得当声光单元接收到信号时，声光单元以这样的频率工作，并以预定角度衍射相应的波束。
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公开(公告)号：US4539685A
公开(公告)日：1985-09-03
申请号：US414097
申请日：1982-09-02
CPC分类号： H01S3/104 , H01S3/08009 , H01S3/113 , H01S3/1055 , H01S3/2232
摘要： A passively Q-switched RF powered laser provides a variable output pulse format by controlling the duration of applied RF power and the time interval between application of power. High repetition rates may be used for scanning and target acquisition in a laser radar system and low repetition rates may be used for ranging.
摘要翻译： 被动Q开关RF供电激光器通过控制施加的RF功率的持续时间和施加功率之间的时间间隔来提供可变的输出脉冲格式。 高重复率可用于激光雷达系统中的扫描和目标采集，低重复率可用于测距。
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5.发明授权Apparatus for improving the optical intensity induced damage limit of optical quality crystals 失效用于改善光学强度的光学质量晶体损伤极限的装置
公开(公告)号：US5680412A
公开(公告)日：1997-10-21
申请号：US506782
申请日：1995-07-26
CPC分类号： G02F1/3551 , G02F1/3525 , H01S3/0092
摘要： The apparatus of the present invention significantly improves the optical intensity induced damage limit of optical quality crystals, and in particular crystals used in the conversion of laser radiation at a specific wavelength to another wavelength or other wavelengths through non-linear interaction of the input laser radiation with the optical crystal medium. In accordance with the present invention, passive optical elements are positioned at the laser beam exiting and entrance surfaces of the active optical element. The surfaces of the passive optical elements are placed up against respective exiting and entrance surfaces of the active optical element. Since the optically transparent passive optical elements have higher mass than optical coatings, they provide vastly superior cooling, and therefore, considerably higher laser damage threshold for the surfaces. Higher damage thresholds results in a significant increase in the performance, reliability, and failure damage safety margin while reducing size and cost of high intensity laser systems and subsystems that utilize active optical elements.
摘要翻译： 本发明的装置显着改善了光学质量晶体的光强度诱发的损伤极限，特别是通过输入激光辐射的非线性相互作用将特定波长的激光辐射转换成另一波长或其它波长的晶体 与光学晶体介质。 根据本发明，无源光学元件位于离开激活光学元件的入射表面的激光束处。 无源光学元件的表面被放置在相对于有源光学元件的相应出射和入射表面上。 由于光学透明无源光学元件具有比光学涂层更高的质量，因此它们提供了非常优异的冷却，因此提供了相当高的表面的激光损伤阈值。 更高的损伤阈值导致性能，可靠性和故障损伤安全裕度的显着增加，同时降低了使用有源光学元件的高强度激光系统和子系统的尺寸和成本。
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公开(公告)号：US5079773A
公开(公告)日：1992-01-07
申请号：US641389
申请日：1991-01-15
CPC分类号： H01S3/2383 , H01S3/0315 , H01S3/03
摘要： A phase-locked ridge waveguide gas laser includes a body that circumferentially bounds an elongated internal space extending along a longitudinal main plane and bisected by a longitudinal central plane. The internal space contains a gaseous lasing medium that is excited at radio frequency with attendant light emission from the gaseous medium. Mirrors are so positioned relative to the body as to provide lasing of the light emission. Respective ridges partition the internal space into a plurality of laser resonator cavities each sustaining a guided mode of the lasing light emission. Each of the cavities extends longitudinally of the body and is spaced from an adjacent cavity by a predetermined distance in a width direction of the internal space. At least the height dimension, as considered along the central plane, of at least a first of the cavities that is more remote from the central plane is smaller than that of a closer second of the cavities to an extent dependent on a variation in a propagation constant of the guided lasing light mode in the gaseous lasing medium contained in such cavities as the laser is in operation.
摘要翻译： 锁相脊波导气体激光器包括沿着纵向主平面延伸并由纵向中心平面平分的细长内部空间的本体。 内部空间包含气体激光介质，其在射频处被激发，伴随着来自气态介质的发光。 镜子相对于身体如此定位，以提供发光的激光。 相应的脊将内部空间分隔成多个激光谐振腔，每个激光谐振腔保持激光发射的引导模式。 每个空腔沿主体的纵向延伸并且在相邻的空腔中与内部空间的宽度方向间隔开预定的距离。 至少沿着中心平面考虑的距离中心平面更远的至少一个空腔中的高度尺寸小于空腔的更靠近第二个空腔的高度尺寸，其程度取决于传播的变化 包含在激光器操作的这种空腔中的气体激光介质中的引导的激光光模式的常数。
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公开(公告)号：US4807233A
公开(公告)日：1989-02-21
申请号：US138899
申请日：1987-12-28
申请人： Richard A. Hart , Leon A. Newman , John T. Kennedy
发明人： Richard A. Hart , Leon A. Newman , John T. Kennedy
CPC分类号： H01S3/1307 , H01S3/0315 , H01S3/08045 , H01S3/0975 , H01S3/2383
摘要： A phase-locked ridge waveguide gas laser includes a body that circumferentially bounds an internal space extending along a central plane and containing a gaseous lasing medium. The gaseous medium is excited at radio frequency with attendant light emission from the gaseous medium. Mirrors are so positioned relative to the body as to provide lasing of the light emission. Respective ridges partition the internal space into a plurality of cylindrical laser resonator cavities each sustaining a guided mode of the lasing light emission. Each of the cavities extends longitudinally of the body and is spaced from an adjacent cavity by a predetermined distance in a width direction of the internal space. The ridges are substantially cusp-shaped and extend into the internal space along a height dimension in respective aligned pairs. At least one of the ridges of each pair terminates short of the central plane to provide with the respective other ridge of the pair a gap which connects two adjacent ones of the laser resonator cavities for phase-locking the guided modes in such cavities. The adjacent resonator cavities overlap each other at the region of the respective gaps.
摘要翻译： 锁相脊波导气体激光器包括沿着中心平面延伸并包含气体激光介质的内部空间的周向界定的主体。 气体介质在无线电频率下被激发，伴随着来自气体介质的光发射。 镜子相对于身体如此定位，以提供发光的激光。 相应的脊将内部空间分隔成多个圆柱形激光谐振腔，每个圆柱形激光谐振腔均承受激光发射的引导模式。 每个空腔沿主体的纵向延伸并且在相邻的空腔中与内部空间的宽度方向间隔开预定的距离。 脊基本上是尖形的并且沿着相应对准的对中的高度尺寸延伸到内部空间中。 每对的脊中的至少一个峰终止于中心平面的短边，以提供该对的相应的另一个脊，该间隙连接两个相邻的激光谐振器腔，用于将这些腔中的引导模式相位锁定。 相邻的谐振腔在相应间隙的区域处彼此重叠。
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8.发明授权
公开(公告)号：US4787090A
公开(公告)日：1988-11-22
申请号：US173790
申请日：1988-03-28
申请人： Leon A. Newman , John T. Kennedy , Richard A. Hart
发明人： Leon A. Newman , John T. Kennedy , Richard A. Hart
IPC分类号： H01S3/038 , H01S3/03 , H01S3/0975 , H01S3/097
CPC分类号： H01S3/0315
摘要： A compact distributed inductance RF-excited waveguide gas laser arrangement includes a housing which bounds an internal space, and a waveguide laser stack located in the internal space. The stack includes, in succession, a first electrode which may be constituted by a portion of the housing, a waveguide body bounding at least one laser cavity, a second electrode, a spacer body, and a plurality of flat inductor coils that extend along a major surface of the spacer body that faces away from the second electrode and are distributed along the length of the laser cavity. Each of the inductor coils has a first end electrically connected with the first electrode and a second end electrically connected with the second electrode so that, when alternating electric current at radio frequency is applied to one of the electrodes, the inductance of each of the inductor coils is arranged electrically in parallel with the capacitance formed between the first and second electrodes and transversely of the laser cavity.
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公开(公告)号：US07058093B2
公开(公告)日：2006-06-06
申请号：US10742563
申请日：2003-12-19
申请人： John T. Kennedy , Richard A. Hart , Lanny Laughman , Joel Fontanella , Anthony J. DeMaria , Leon A. Newman , Robert Henschke
发明人： John T. Kennedy , Richard A. Hart , Lanny Laughman , Joel Fontanella , Anthony J. DeMaria , Leon A. Newman , Robert Henschke
CPC分类号： H01S3/2232 , H01S3/03 , H01S3/0315 , H01S3/0813 , H01S3/097 , H01S3/09702 , H01S3/1061 , H01S3/1075 , H01S3/1103 , H01S3/115 , H01S3/2325 , H01S3/2366
摘要： This disclosure discusses techniques for obtaining wavelength selected simultaneously super pulsed Q-switched and cavity dumped laser pulses utilizing high optical damage threshold electro-optic modulators, maintaining a zero DC voltage bias on the CdTe electro-optic modulator (EOM) so as to minimize polarization variations depending on the location of the laser beam propagating through the CdSe EOM crystal, as well as the addition of one or more laser amplifiers in a compact package and the use of simultaneous gain switched, Q-switched and cavity dumped operation of CO2 lasers for generating shorter pulses and higher peak power for the hole drilling, engraving and perforation applications.
摘要翻译： 本公开内容讨论了利用高光损伤阈值电光调制器获得同时选择的同时超脉冲Q切换和空腔倾倒激光脉冲的技术，在CdTe电光调制器（EOM）上保持零直流电压偏置，从而最小化极化 取决于通过CdSe EOM晶体传播的激光束的位置的变化，以及在紧凑型封装中添加一个或多个激光放大器以及使用CO
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公开(公告)号：US06489545B1
公开(公告)日：2002-12-03
申请号：US09586364
申请日：2000-06-02
申请人： Richard A. Hart , Justin D. Tew
发明人： Richard A. Hart , Justin D. Tew
IPC分类号： G10D1308
CPC分类号： G10K5/00
摘要： A sound producing device for producing a whistling sound when placed in the mouth of a user and blown through. The sound producing device includes a sound producing member for placing in the mouth of the user. The sound producing member comprises a first end edge and a second end edge, and first and second side edges extending between the first and second end edges. The sound producing member comprises a first section and a second section. The first and second sections are positioned substantially parallel to each other. The first and second sections are spaced from each other with a gap therebetween. Each of the first and second sections has an aperture through the respective section at a substantially central location of the respective section. A third section of the sound producing member extends between the first and second sections.
摘要翻译： 声音产生装置，用于当放置在使用者口中并吹过时产生啸叫声。 声音产生装置包括用于放置在用户口中的声音产生部件。 声音产生构件包括第一端边缘和第二端边缘，以及在第一和第二端边缘之间延伸的第一和第二侧边缘。 声音产生部件包括第一部分和第二部分。 第一和第二部分基本上彼此平行地定位。 第一和第二部分彼此间隔开间隔开。 第一和第二部分中的每一个在相应部分的基本中心位置处具有通过相应部分的孔。 声音产生部件的第三部分在第一和第二部分之间延伸。
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