公开(公告)号：US5151814A

公开(公告)日：1992-09-29

申请号：US673175

申请日：1991-03-18

Applicant: Jan Grinberg ,  Thomas R. O'Meara ,  Yuri Owechko ,  Melvin E. Pedinoff ,  Bernard H. Soffer

Inventor： Jan Grinberg ,  Thomas R. O'Meara ,  Yuri Owechko ,  Melvin E. Pedinoff ,  Bernard H. Soffer

IPC: G02F1/1343 ,  G02F1/1347 ,  G02F1/139 ,  G02F1/29

CPC classification number: G02B27/0087 ,  G02F1/292 ,  G02F1/134336 ,  G02F1/1347 ,  G02F1/1393 ,  G02F2203/01 ,  G02F2203/02 ,  G02F2203/24

Abstract: An optical beam scanner incorporating an array of beam deflection elements commonly controlled to steer an optical beam impingent on the array is described. The beam steering elements are arranged in the array as individually controlled elements and the deflection of the beam is accomplished by setting the phase tilt and the phase offset of each element according to a calculation which removes modulo 2.pi. phase shift from the required position relative to a flat plane. Thus, the array elements can be thin and need only supply about 2 radians of phase shift. These elements may be incorporated in a planar array using beam deflection elements such as liquid crystal beam deflectors by choosing a drive scheme representing either a blazed array or a flat piston array. Operation may be designed for a large range of light wavelengths and the system may efficiently accommodate a combination of the blazed and flat piston techniques to obtain beam deflection characteristics otherwise unavailable by the exclusive use of each individual technique. By use of the liquid crystal phased array approach, rapid, high accuracy, large area beam deflection is possible without the necessity of any moving parts and with low power drive requirements. Phased arrays of the type described above may be arranged in successive parallel planes with a common beam axis to provide two-dimensional beam deflection.

Abstract translation: 描述了一种光束扫描器，其包括通常被控制以引导照射在阵列上的光束的光束偏转元件阵列。 光束操纵元件作为独立控制的元件布置在阵列中，并且通过根据计算来设置每个元件的相位倾斜和相位偏移来实现光束的偏转，该计算从相对于所需位置移除模2π相移 平面飞机 因此，阵列元件可以是薄的，并且仅需要提供约2弧度的相移。 通过选择表示闪耀阵列或平坦活塞阵列的驱动方案，这些元件可以使用诸如液晶束偏转器的光束偏转元件并入平面阵列中。 操作可以设计用于大范围的光波长，并且系统可以有效地适应闪耀和平坦活塞技术的组合以获得否则不能通过各自独占技术的独占使用而获得光束偏转特性。 通过使用液晶相位阵列方法，可以快速，高精度，大面积的光束偏转，而不需要任何移动部件和低功率驱动要求。 上述类型的相控阵列可以布置在具有共同波束轴的连续平行平面中，以提供二维波束偏转。

公开(公告)号：US5126876A

公开(公告)日：1992-06-30

申请号：US663277

申请日：1991-02-28

Applicant: Thomas R. O'Meara

Inventor： Thomas R. O'Meara

IPC: H01S3/00 ,  H01S3/10 ,  H01S3/23

CPC classification number: H01S3/2333 ,  H01S3/0064 ,  H01S3/005 ,  H01S3/10076 ,  H01S3/2383

Abstract: A master oscillator power amplifier (MOPA) system which isolates the master oscillator (MO) from the return amplified beam by dividing the return beam into two components, introducing a phase shift between the components, and recombining the phase shifted beam components through constructive interference into an output beam directed away from the MO. A destructive interference return output is directed back towards the MO, but is held to a negligible level by making the phase shift approximately equal to an odd number of half-wavelengths at the return beam wavelength. In the preferred embodiment a stimulated Brillouin scattering phase conjugate mirror (PCM) is used to direct the amplified beam for a second amplification pass, while a Mach-Zender interferometer transmits the beam both before and after double amplification. The original beam is replicated after its first path through the interferometer by having the interferometer phase shift also equal an integral number of wavelengths at the input beam wavelength, prior to frequency shifting by the PCM.

公开(公告)号：US5048935A

公开(公告)日：1991-09-17

申请号：US947575

申请日：1986-12-24

Applicant: Uzi Efron ,  Bernard H. Soffer ,  Richard C. Lind ,  David M. Pepper ,  Thomas R. O'Meara

Inventor： Uzi Efron ,  Bernard H. Soffer ,  Richard C. Lind ,  David M. Pepper ,  Thomas R. O'Meara

IPC: G01J9/00 ,  G02B26/06

CPC classification number: G03H1/0005 ,  G01J9/00 ,  G02B26/06 ,  G03H1/2294 ,  G03H2001/0066 ,  G03H2225/32

Abstract: Apparatus for compensating for inherent distortions in a modified liquid crystal light valve used in an integrated wavefront sensing and wavefront control system for laser optics. A main wavefront sensing and control system utilizes a liquid crystal light valve selected for response speed but having inherent surface non-linearities. A beam from an auxiliary laser is intermittently applied, while the main laser is blocked, to both the fast response LCLV of the main system and to a slower response LCLV of an associated correction system. The second LCLV system corrects for the non-linearities in the surface of the first LCLV and then maintains the stored correction signal for a decay interval which corresponds to several response times of the main LCLV, thus permitting the main LCLV system to perform fast correction of atmospheric aberrations in the laser beam wavefront unaffected by inherent surface non-linearities.

Abstract translation: 用于补偿在用于激光光学的集成波前感测和波前控制系统中使用的改进的液晶光阀中的固有失真的装置。 主波前感测和控制系统利用了选择响应速度但具有固有表面非线性的液晶光阀。 来自辅助激光器的光束在主激光器被阻挡的同时被间歇地施加到主系统的快速响应LCLV和相关校正系统的较慢响应LCLV。 第二LCLV系统校正第一LCLV的表面中的非线性，然后将存储的校正信号维持在对应于主LCLV的几个响应时间的衰减间隔，从而允许主LCLV系统执行快速校正 激光束波前的大气像差不受固有表面非线性的影响。

公开(公告)号：US4902980A

公开(公告)日：1990-02-20

申请号：US274740

申请日：1988-11-14

Applicant: Thomas R. O'Meara

Inventor： Thomas R. O'Meara

IPC: H01S3/00 ,  H01S3/083 ,  H01S3/10 ,  H01S3/23

CPC classification number: H01S3/2333 ,  H01S3/0064 ,  H01S3/083 ,  H01S3/10076 ,  H01S3/2316

Abstract: An improved phase conjugate master-oscillator power-amplifier laser system for providing a high-power low-distortion laser output beam. The system includes an improved oscillator such as a ring oscillator which rejects any of the output beam which is inadvertently fed back to the oscillator, thereby preventing unwanted oscillation. The system also includes an attenuator such as a spatial filter or an optical isolator that attenuates any amplified spontaneous emissions that may be reflected from the power amplifier to the oscillator, thereby preventing oscillator degradation that would otherwise result. The invention is particularly well-suited for a laser system which employs an SBS mirror for phase conjugation.

Abstract translation: 一种改进的相位共轭主振荡器功率放大器激光系统，用于提供大功率低失真的激光输出光束。 该系统包括改进的振荡器，例如环形振荡器，其拒绝任何不经意地反馈到振荡器的输出光束，从而防止不必要的振荡。 该系统还包括衰减器，例如空间滤波器或光隔离器，其衰减可能从功率放大器反射到振荡器的任何放大的自发发射，从而防止否则将导致的振荡器衰减。 本发明特别适用于采用SBS镜用于相位共轭的激光系统。

公开(公告)号：US4642582A

公开(公告)日：1987-02-10

申请号：US836201

申请日：1986-02-26

Applicant: Thomas R. O'Meara

Inventor： Thomas R. O'Meara

IPC: G02F1/35 ,  H01S3/30

CPC classification number: G02F1/3534

Abstract: Apparatus for encoding and decoding laser pulses, or the like. At least one laser source applied laser energy to a nonlinear material in a manner such that counter-propagating beams are applied to the material. These laser beams are spatially or temporally modulated in a predetermined manner. The modulation may be continuous, or discrete, amplitude or phase modulation. Another laser source provides a probe pulse which traverses the nonlinear material and interacts with the counter-propagating laser beams in a manner known as four-wave mixing. This process generates an encoded laser pulse whose modulation pattern is a function of the modulation of the counter-propagating beams. A decoded laser pulse is obtained by applying the encoded pulse to the apparatus and reversing the modulation of the counter-propagating laser beams.

Abstract translation: 用于对激光脉冲进行编码和解码的装置等。 至少一个激光源将激光能量施加到非线性材料，使得反向传播的光束被施加到材料上。 这些激光束以预定方式进行空间或时间调制。 调制可以是连续的或离散的振幅或相位调制。 另一激光源提供探针脉冲，其穿过非线性材料并以称为四波混频的方式与反向传播的激光束相互作用。 该过程产生编码的激光脉冲，其调制模式是反向传播光束的调制的函数。 通过将编码脉冲施加到装置并反转反向传播的激光束的调制来获得解码的激光脉冲。

公开(公告)号：US3980879A

公开(公告)日：1976-09-14

申请号：US482187

申请日：1974-06-24

Applicant: Thomas R. O'Meara

Inventor： Thomas R. O'Meara

IPC: G02B26/06 ,  G01J1/20

CPC classification number: G02B26/06

Abstract: An adaptive imaging telescope having nonlinear sensing means for detecting an optical image received thereby. The system comprises a phase shifter, positioned at the aperture of the telescope or at an image plane thereof. This system also includes a nonlinear image quality sensor optically coupled to the phase shifter, consisting of a quadrant nonlinear detector wherein each detector element of the quadrant detector is responsive to light from the optical image, the quadrant detector comprising nonlinear photocells or detectors whose plane is positioned at an image plane of the telescope. The photocells are connected to a network for providing image quality error signals. Analog circuits are provided to receive the sensor output and provide a closed-loop return to the phase shifter.

Abstract translation: 一种自适应成像望远镜，具有用于检测由此接收的光学图像的非线性感测装置。 该系统包括位移器，位于望远镜的孔或其图像平面处。 该系统还包括光耦合到移相器的非线性图像质量传感器，其由象限非线性检测器组成，其中象限检测器的每个检测器元件响应于来自光学图像的光，该象限检测器包括非线性光电管或其平面为 位于望远镜的图像平面。 光电池连接到网络以提供图像质量误差信号。 提供模拟电路以接收传感器输出并提供闭环返回到移相器。

公开(公告)号：US07262861B1

公开(公告)日：2007-08-28

申请号：US10852782

申请日：2004-05-24

Applicant: David M. Pepper ,  Thomas R. O'Meara

Inventor： David M. Pepper ,  Thomas R. O'Meara

IPC: G01B11/02

CPC classification number: G01B17/02 ,  G01B11/06 ,  G01N21/1702 ,  G01N29/043 ,  G01N29/2418 ,  G01N2291/02827 ,  G01N2291/02854 ,  G01N2291/0421

Abstract: A laser ultrasonic inspection apparatus and method which enables remote sensing of thickness, hardness, temperature and/or internal defect detection is disclosed. A laser generator impinges a workpiece with light for generating a thermo-elastic acoustic reaction in a workpiece. A probe laser impinges the workpiece with an annularly-shaped probe light for interaction with the acoustic signal in the workpiece resulting in a modulated return beam. A photodetector having a sensitive region for detecting an annularly-shaped fringe pattern generated by an interaction of a reference signal and with the modulated return beam at said sensitive region.

Abstract translation: 公开了能够远程检测厚度，硬度，温度和/或内部缺陷检测的激光超声波检查装置和方法。 激光发生器用工件照射工件以在工件中产生热弹性声反应。 探头激光器用环形探针光照射工件，以与工件中的声信号相互作用，从而产生调制的返回光束。 一种光电检测器，具有用于检测通过参考信号的相互作用产生的环形条状图案的敏感区域和在所述敏感区域处的调制返回光束。

公开(公告)号：US4833314A

公开(公告)日：1989-05-23

申请号：US236343

申请日：1988-08-22

Applicant: David M. Pepper ,  Thomas R. O'Meara

Inventor： David M. Pepper ,  Thomas R. O'Meara

IPC: G01J9/02 ,  G02F1/13 ,  G02F1/1343

CPC classification number: G02F1/134309 ,  G01J9/02 ,  G02F1/1313

Abstract: An electro-optical device (10) is used to alter characteristics of a light beam passing through it. In a particularly preferred embodiment, the device (10) is used as a phase stop having a dynamically variable aperture whose size is defined by the selected application of an electrical potential across one or more concentric, transparent ring-like electrodes (13, 14, 16 and 18). The electro-optical device (10) finds particular utility in a common-path interferometer (40) where fringe visibility is optimized by using suitable servo-electronics (56) to select an appropriate aperture size for the phase stop (10).

Abstract translation: 电光装置（10）用于改变通过它的光束的特性。 在特别优选的实施例中，装置（10）用作具有动态可变孔径的相位停止器，其尺寸由所选择的跨越一个或多个同心的透明环状电极（13,14， 16和18）。 电光装置（10）在公共路径干涉仪（40）中具有特别的用途，其中通过使用合适的伺服电子设备（56）来选择相位停止（10）的适当孔径尺寸来优化边缘可见度。

公开(公告)号：US4573157A

公开(公告)日：1986-02-25

申请号：US559613

申请日：1983-12-08

Applicant: Thomas R. O'Meara

Inventor： Thomas R. O'Meara

IPC: G02F1/35 ,  H01S3/10 ,  H01S3/108 ,  H01S3/098

CPC classification number: G02F1/3538 ,  H01S3/10076 ,  H01S3/1086

Abstract: A laser using a stimulated Brillouin scattering (SBS) mirror and a moving grating eliminates frequency walkoff of the reflected beams. A laser using a double-SBS mirror prevents frequency walkoff by having the other side of the SBS mirror act as a conjugate moving grating.

Abstract translation: 使用受激布里渊散射（SBS）反射镜和移动光栅的激光器消除了反射光束的频率偏移。 使用双SBS镜的激光器通过使SBS镜的另一侧用作共轭移动光栅来防止频率消失。

公开(公告)号：US4068234A

公开(公告)日：1978-01-10

申请号：US641395

申请日：1975-12-16

Applicant: Thomas R. O'Meara

Inventor： Thomas R. O'Meara

IPC: G01S7/02 ,  G01S13/00 ,  G01S13/89 ,  G01S7/04

CPC classification number: G01S7/024 ,  G01S13/003 ,  G01S13/89

Abstract: Disclosed herein is an imaging system comprising a linear array of receivers and a single transmitter deployed and operated in such a manner as to produce the equivalent of a completely filled, two-dimensional array.

Abstract translation: 本文公开了一种成像系统，其包括接收器的线性阵列和以这样的方式进行部署和操作的单个发射器，以产生相当于完全填充的二维阵列。