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    • 2. 发明授权
    • Apparatus and method for spatial intensity threshold detection
    • 用于空间强度阈值检测的装置和方法
    • US4715689A
    • 1987-12-29
    • US864937
    • 1986-05-20
    • Thomas R. O'MearaRichard C. Lind
    • Thomas R. O'MearaRichard C. Lind
    • G02B26/06G02F1/35G02B5/23G02F1/01
    • G02F1/3538G02B26/06
    • A phase conjugate resonator (PCR) employing at least one phase conjugate mirror (PCM) provides high resolution spatial detection of individual locations in a two-dimensional optical array which exceed or fall below a threshold level. In one embodiment the optical intensity profile under investigation is imposed either onto one or both of the pump beams of a degenerate four-wave mixing PCM. In another embodiment a pair of PCMs are used as the two mirrors forming the PCR, with the pump beams for one PCM modulated and the pump beams for the other PCM serving as a threshold reference. In either case, the spatially modulated optical output may be read out with multiple detectors or an imaging system, or the cumulative area output of the PCR can be read out with a single detector to characterize the intensity profile relative to the threshold.
    • 使用至少一个相位共轭反射镜(PCM)的相位共轭谐振器(PCR)提供超过或低于阈值水平的二维光学阵列中的各个位置的高分辨率空间检测。 在一个实施例中,所研究的光强度曲线被施加到简并四波混频PCM的一个或两个泵浦波束上。 在另一个实施例中,使用一对PCM作为形成PCR的两个反射镜,其中用于一个PCM的泵浦光束被调制,另一个PCM的泵浦光束用作阈值参考。 在任一情况下,空间调制的光输出可以用多个检测器或成像系统读出,或者可以用单个检测器读出PCR的累积面积输出,以表征相对于阈值的强度分布。
    • 4. 发明授权
    • Four-pass phase conjugate optical amplifier system and method
    • 四通相位共轭光放大器系统及方法
    • US4943782A
    • 1990-07-24
    • US170957
    • 1988-03-21
    • Ronald R. StephensRichard R. CraigHuan W. YenRichard C. Lind
    • Ronald R. StephensRichard R. CraigHuan W. YenRichard C. Lind
    • H01S3/08G02F1/35H01S3/00H01S3/06H01S3/10H01S5/00H01S5/024H01S5/06H01S5/10H01S5/50
    • H01S5/02423H01S3/005H01S3/10076H01S5/50H01S5/005H01S5/5036
    • A four-pass conjugate optical amplifier system and method are disclosed in which a linear polarized optical beam is directed by various optical elements through four passes of a power amplifier, preferably a diode laser structure. The beam is phase conjugated at the optical midpoint between the second and third amplifying passes, and is controlled by the optical elements so that its polarization is substantially the same during the first and second passes, and again substantially the same during the third and fourth amplifying passes. This is accomplished by a reflective coating on the back facet of the diode laser structure, with a non-reciprocal polarization rotation element located in the beam path between the phase conjugate mirror and power amplifier. For considerably enhanced power amplification, the beam may be divided into an array of subbeams, which are individually amplified by four passes through respective power amplifiers. The subbeams are processed by the optical system so that they recombine into a single coherent output beam after full amplification.
    • 公开了一种四通共轭光放大器系统和方法,其中线偏振光束由功率放大器,优选二极管激光器结构的四次通过各种光学元件引导。 光束在第二和第三放大通道之间的光中点处相位共轭,并且由光学元件控制,使得其在第一次和第二次通过期间的极化基本相同,并且在第三和第四放大期间基本相同 通过 这是通过二极管激光器结构的背面上的反射涂层来实现的,其中非互易偏振旋转元件位于相位共轭反射镜和功率放大器之间的光束路径中。 为了显着增强功率放大,光束可以被划分成子束阵列,其通过相应的功率放大器四次通过单独放大。 子光束由光学系统处理,使得它们在完全放大之后复合成单个相干输出光束。
    • 6. 发明授权
    • Bandwidth-preserving brillouin phase conjugate mirror and method
    • 带宽保留布里渊相位共轭镜和方法
    • US4958908A
    • 1990-09-25
    • US323649
    • 1989-03-15
    • Davis A. RockwellRichard C. LindDavid M. Pepper
    • Davis A. RockwellRichard C. LindDavid M. Pepper
    • G02F1/35H01S3/30
    • G02F1/3538H01S3/305
    • A coherent input beam from a laser is fed into a Brillouin-enhanced four wave mixer which generates a phase conjugated seed beam in counterpropagation with the input beam. A brillouin amplifier is provided between the laser and four wave mixer to transfer energy from the input beam to the seed beam and thereby amplify the seed beam to produce a phase conjugated output beam with approximately 50% of the energy of the input beam and narrow bandwidth which is free from random phase jumps associated with the acoustic noise generally required to initiate and sustain stimulated Brillouin scattering. The phase conjugated output beam can be modulated or steered in direction, as desired. Reference beams for the four wave mixer may be derived from the same laser source as the input beam and have energies one or more orders of magnitude smaller than the energy of the input beam.
    • 来自激光器的相干输入光束被馈送到布里渊增强型四波混频器中,其产生与输入光束相反的相位共轭种子光束。 在激光和四波混频器之间提供布里渊放大器,以将能量从输入光束传输到种子光束,从而放大种子光束,以产生相位共轭输出光束,输入光束的能量约为50%,窄带宽 其没有与通常需要启动和维持受激布里渊散射的声学噪声相关联的随机相位跳跃。 可以根据需要在相位共轭输出光束的方向上进行调制或转向。 用于四波混频器的参考光束可以从与输入光束相同的激光源获得,并且具有比输入光束的能量小一个或多个数量级的能量。
    • 9. 发明授权
    • On-line &mgr; method for robust flutter prediction in expanding a safe flight envelope for an aircraft model under flight test
    • 在飞行测试中扩展飞机模型的安全飞行包线的在线mu方法进行强劲的扑动预测
    • US06216063B1
    • 2001-04-10
    • US09074024
    • 1998-05-06
    • Richard C. LindMartin J. Brenner
    • Richard C. LindMartin J. Brenner
    • G05D300
    • B64F5/60B64D2045/0085
    • A structured singular value (&mgr;) analysis method of computing flutter margins has robust stability of a linear aeroelastic model with uncertainty operators (&Dgr;). Flight data is used to update the uncertainty operators to accurately account for errors in the computed model and the observed range of aircraft dynamics of the aircraft under test caused by time-varying aircraft parameters, nonlinearities, and flight anomalies, such as test nonrepeatability. This &mgr;-based approach computes predict flutter margins that are worst-case with respect to the modeling uncertainty for use in determining when the aircraft is approaching a flutter condition and defining an expanded safe flight envelope for the aircraft that is accepted with more confidence than traditional methods that do not update the analysis algorithm with flight data by introducing &mgr; as a flutter margin parameter that presents several advantages over tracking damping trends as a measure of a tendency to instability from available flight data.
    • 计算颤振边缘的结构化奇异值(μ)分析方法具有具有不确定性运算符(DELTA)的线性气动弹性模型的鲁棒稳定性。 飞行数据用于更新不确定性运算符,以准确地计算计算模型中的误差,以及由时变飞机参数,非线性和飞行异常(如测试不可重复性)引起的被测飞机的飞行器动力学观测范围。 这种基于mu的方法计算预测颤振边缘,这是相对于建模不确定性的最差情况,用于确定飞机何时接近颤振状况,并为飞行器定义扩展的安全飞行包线,该传感器比传统的更有信心接受 通过引入mu作为颤振边界参数,不会更新具有飞行数据的分析算法的方法,其具有优于跟踪阻尼趋势的几个优点,作为来自可用飞行数据的不稳定趋势的量度。