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    • 21. 发明授权
    • Optical vibrometer
    • 光学振动计
    • US07382465B1
    • 2008-06-03
    • US11511383
    • 2006-08-25
    • David M. Pepper
    • David M. Pepper
    • G01B9/02
    • G01H9/004
    • A vibrometer system for determining the vibration spectrum of an object under examination. The vibrometer includes a bundle of optical fibers arranged in an array, wherein a majority of the fibers in the array are arranged to receive light reflected from the object under examination and a minority of the fibers in the array are arranged to transmit light to illuminate the object under examination, wherein the light reflected from the object under test by received by the majority of fibers was transmitted by the minority of fibers; a plurality of light amplifiers and detectors for amplifying and detecting the received light; and a coherent detector responsive to the detected light and to the transmitted light for providing an output signal representative of the vibration spectrum of the object under examination.
    • 用于确定被检查物体的振动谱的振动计系统。 振动计包括布置成阵列的一束光纤,其中阵列中的大部分光纤布置成接收从被检查物体反射的光,阵列中的少数光纤被布置成透射光以照亮 被检物体被大多数纤维接收的被测物体反射的光被少数纤维透过; 用于放大和检测所接收的光的多个光放大器和检测器; 以及响应于检测到的光和透射光的相干检测器,用于提供表示被检查物体的振动谱的输出信号。
    • 25. 发明授权
    • Robust infrared countermeasure system and method
    • 强大的红外对策系统及方法
    • US06872960B2
    • 2005-03-29
    • US09837733
    • 2001-04-18
    • David M. PepperDennis C. Jones
    • David M. PepperDennis C. Jones
    • G01S7/481G01S7/495G01B11/26G01S13/86
    • F41H13/005G01S7/4816G01S7/495
    • A system and method for focusing electromagnetic energy on a moving target. Generally, the inventive system sends a pilot beam to a target and analyzes a return wavefront to ascertain data with respect to any distortions and other phase and/or amplitude information in the wavefront. This information is then used to pre-distort an output beam by so that it is focused on the target by the intervening distortions. In an illustrative embodiment, the pilot beam is provided by a beacon laser mounted off-axis with respect to the output beam. The reflected wavefront is received through a gimbaled telescope. Energy received by the telescope is detected and processed to ascertain wavefront aberrations therein. This data is used to predistort a deformable mirror to create an output beam which is the phase conjugate of the received wavefront. In a first alternative embodiment, a nonlinear optical phase-conjugate mirror is employed to generate the required wavefront-reversed replica of the received wavefront. The system further includes an arrangement for modulating the output beam to confuse the target. In a second alternative embodiment, the system is adapted to examine atmospheric distortions of starlight to predistort the output beam. The alternative embodiment offers a faster response time and a lower susceptibility to detection.
    • 一种用于将电磁能量聚焦在移动目标上的系统和方法。 通常,本发明的系统向目标发送导频波束并且分析返回波阵面以确定关于波前的任何失真和其它相位和/或振幅信息的数据。 然后,该信息用于对输出光束进行预失真,使其通过中间的失真聚焦在目标上。 在说明性实施例中,导频波束由相对于输出波束离轴安装的信标激光器提供。 反射的波前通过万向望远镜接收。 检测并处理由望远镜接收的能量以确定其中的波前像差。 该数据用于预变形可变形反射镜以产生作为接收波前的相位共轭的输出光束。 在第一替代实施例中,使用非线性光学相位共轭反射镜来产生所接收的波前的所需波前反转副本。 该系统还包括用于调制输出光束以混淆目标的装置。 在第二替代实施例中,系统适于检查星光的大气变形以预失真输出光束。 替代实施例提供更快的响应时间和更低的检测敏感性。
    • 26. 发明授权
    • Coherent detecting receiver using a time delay interferometer and adaptive beam combiner
    • 相干检测接收机采用时延干涉仪和自适应光束组合器
    • US06819432B2
    • 2004-11-16
    • US09808472
    • 2001-03-14
    • David M. PepperGilmore J. Dunning
    • David M. PepperGilmore J. Dunning
    • G01B902
    • H04B10/60
    • An optical apparatus for coherent detection of an input optical beam. The apparatus includes a beam splitter for splitting the input optical beam into a first component and a second component; an optical delay device arranged to receive the second component, the optical delay device imposing an intentional delay in the second component of the input optical beam; and an adaptive beam combiner coupled to receive the second component with a delay imposed thereon by the optical delay device; and the first component from the beam splitter. The adaptive beam combiner has two exiting components having the same wavefronts and propagating directions as the first and second components and being in quadrature. A detector arrangement is provided for receiving and detecting the first and second exiting components from the adaptive beam combiner.
    • 一种用于相干检测输入光束的光学装置。 该装置包括用于将输入光束分成第一部件和第二部件的分束器; 布置成接收第二分量的光学延迟装置,所述光学延迟装置在输入光束的第二分量中施加有意延迟; 以及耦合以由所述光学延迟装置施加在其上的延迟来接收所述第二部件的自适应光束组合器; 和分束器的第一个部件。 自适应光束组合器具有两个出射分量,其具有与第一和第二分量相同的波前和传播方向,并且正交。 提供了一种检测器装置,用于从自适应光束组合器接收和检测第一和第二出射分量。
    • 29. 发明授权
    • Real-time compensated imaging system and method using a double-pumped
phase-conjugate mirror
    • 实时补偿成像系统和使用双泵浦相位共轭镜的方法
    • US5557431A
    • 1996-09-17
    • US169888
    • 1993-12-16
    • David M. Pepper
    • David M. Pepper
    • G02F1/35G03H1/04G03H1/10
    • G03H1/0248G02F1/3538
    • An adaptive optics imaging system uses a double pumped phase conjugate mirror (DPCM) to compensate for phase, amplitude or polarization aberrations imposed upon a multi-pixel object beam. A remote reference beam is used to sample an aberrating medium through which the object beam is transmitted, and forms a shared hologram in a two-beam coupling medium with a local reference beam having known phase characteristics, generally plane-wave. An output beam is produced in the phase conjugate direction of the local reference beam, with the pixelized difference in phase characteristics between the output and local reference beams corresponding to the pixelized difference in phase characteristics between the object and remote reference beams; the remote reference beam is also preferably planar. The two reference beams have powers substantially greater than the object beam, and the reference beams also preferably have known intensity characteristics that allow aberrations in the object beam's intensity to be compensated. The various beams can be either pulsed or continuous wave, and can be mutually incoherent. Several different filters are described to segregate the object beam component of the output beam from the remote reference beam component.
    • 自适应光学成像系统使用双泵浦相位共轭镜(DPCM)来补偿施加在多像素物体光束上的相位,幅度或偏振像差。 使用远程参考光束来对目标光束透射的像差介质进行采样,并在具有已知相位特性(通常为平面波)的局部参考光束的双光束耦合介质中形成共享全息图。 在本地参考光束的相位共轭方向上产生输出光束,输出和本地参考光束之间的相位特性的像素化差异对应于物体和远程参考光束之间的相位特性的像素化差异; 远程参考光束也优选是平面的。 两个参考光束具有比对象光束大得多的光焦度,并且参考光束也优选地具有已知的强度特性,其允许物体光束的强度的像差被补偿。 各种光束可以是脉冲或连续波,并且可以是相互不相干的。 描述了几个不同的滤波器以将输出波束的对象波束分量与远程参考波束分量隔离。