Method and apparatus for ultra high frequency spectrum analysis
    1.
    发明授权
    Method and apparatus for ultra high frequency spectrum analysis 失效
    用于超高频谱分析的方法和装置

    公开(公告)号:US4871232A

    公开(公告)日:1989-10-03

    申请号:US130032

    申请日:1987-12-07

    IPC分类号: G01R23/17

    CPC分类号: G01R23/17

    摘要: A high frequency spectral analysis system and method operates by modulating an optical beam with a high frequency signal to be analyzed, and sampling the beam simultaneously at periodically spaced locations along its length. The sampled portions are then focused to a spectral mapping. In the preferred embodiment a beam is directed in a zigzag pattern through a plate, one surface of which is totally reflective and the opposite surface of which is partially reflective. Periodic parallel samples are obtained from the minor portions of the beam which are transmitted out of the plate through the partially reflective surface. The totally reflective surface is preferably formed as a series of cylindrical surfaces which focus the beam to small spots at the partially reflective surface, thereby permitting a higher spatial density of samples without overlapping. The plate thickness is selected so that the beam is sampled at the Nyquist rate for the highest frequency contained in the signal of interest.

    摘要翻译: 高频谱分析系统和方法通过用待分析的高频信号调制光束并且沿其长度在周期性间隔的位置同时采样光束来操作。 然后将采样的部分聚焦到光谱映射。 在优选实施例中,光束以锯齿形图案通过板,其一个表面是完全反射的,其相对表面是部分反射的。 从束的少部分获得周期性的平行样品,其通过部分反射表面从板上传出。 全反射表面优选地形成为将光束聚焦在部分反射表面处的小斑点的一系列圆柱形表面,从而允许更高的样品空间密度而不重叠。 选择板厚度使得以包含在感兴趣信号中的最高频率的奈奎斯特速率采样波束。

    Numerical division of two arrays by optical processing
    3.
    发明授权
    Numerical division of two arrays by optical processing 失效
    通过光学处理对两个阵列进行数值分割

    公开(公告)号:US4686647A

    公开(公告)日:1987-08-11

    申请号:US645573

    申请日:1984-08-29

    IPC分类号: G06E3/00 G06G9/00

    CPC分类号: G06E3/005

    摘要: Apparatus for performing a division of a dividend intensity array by a divisor intensity array on a pixel-by-pixel basis, to yield a quotient intensity array, wherein optical feedback principles are utilized in conjunction with two spatial radiation modulators, so that analog division is achieved. Specifically, a fraction of the output array of a first spatial radiation modulator is provided as the readout array to a second spatial radiation modulator, whose input is the divisor intensity array. The output array of the second image converter is then added to the dividend array and provided as the input to the first spatial radiation modulator, whereupon the output of the first spatial radiation modulator is the pixel-by-pixel quotient array resulting from division of the dividend array by the divisor array.

    摘要翻译: 用于通过除数强度阵列逐像素地执行除数强度阵列的划分的装置,以产生商强度阵列,其中光学反馈原理与两个空间辐射调制器结合使用,使得模拟除法 实现了 具体地,第一空间辐射调制器的输出阵列的一部分作为读出阵列被提供给第二空间辐射调制器,其第二空间辐射调制器的输入是除数强度阵列。 然后将第二图像转换器的输出阵列添加到除数阵列,并作为第一空间辐射调制器的输入提供,由此第一空间辐射调制器的输出是逐个像素商数组, 除数数组的除数数组。

    Optical analog data processing systems for handling bipolar and complex
data
    5.
    发明授权
    Optical analog data processing systems for handling bipolar and complex data 失效
    用于处理双极和复杂数据的光学模拟数据处理系统

    公开(公告)号:US4888724A

    公开(公告)日:1989-12-19

    申请号:US181799

    申请日:1988-04-15

    IPC分类号: G02F3/00 G06E3/00

    CPC分类号: G06E3/005

    摘要: Optical analog data processing systems are described for handling both bipolar and complex data. Multi-cell spatial light modulators are employed in which a plurality of modulation areas are used in conjunction with space and time mutliplexed configurations to process bipolar and complex data elements. Multi-cell light detector arrays are used to convert modulated light into signals representing the processed data. The processing systems are capable of real time processing of synthetic aperture radar data.

    摘要翻译: 描述了用于处理双极和复杂数据的光学模拟数据处理系统。 使用多单元空间光调制器,其中多个调制区域与空间和时间多路复用配置结合使用以处理双极和复数数据元素。 多单元光检测器阵列用于将调制的光转换成表示处理数据的信号。 处理系统能够对合成孔径雷达数据进行实时处理。

    Optical subtraction of images in real time
    7.
    发明授权
    Optical subtraction of images in real time 失效
    实时图像的光学相减

    公开(公告)号:US4124278A

    公开(公告)日:1978-11-07

    申请号:US808941

    申请日:1977-06-22

    IPC分类号: G02F1/135 G06E3/00 G02F1/13

    CPC分类号: G02F1/135 G06E3/001

    摘要: There is disclosed a system capable of subtracting in real time the intensities of two incoherently illuminated scenes and providing the sign of the subtracted information. The system utilizes two birefringent devices such as liquid crystal light valves, onto which the two images to be subtracted are projected. One valve is analyzed in between crossed polarizers, or equivalent, while the other one is in between parallel polarizers or equivalent. Both polarizer arrangements, for example, may be implemented with a polarizing beam splitter and a quarter wave plate. The common output image plane, onto which both images are superposed, displays an intensity proportional to the difference between the two inputs. This intensity "rides" on a constant background intensity thus displaying the difference signal as well as its polarity. The read-in and read-out beams could be coherent as well as incoherent, the latter being more desirable due to its speckle-free image. No other system is presently known which can perform incoherent subtraction. Experimental results obtained with incoherent illumination are given.

    摘要翻译: 公开了一种能够实时减去两个非相干照明场景的强度并提供相减信息的符号的系统。 该系统利用两个双折射装置,例如液晶光阀,将要减去的两个图像投影到该双折射装置上。 在正交偏振器或等效物之间分析一个阀门,而另一个阀门位于平行偏振器或等效物之间。 例如,两个偏振器配置可以用偏振分束器和四分之一波片来实现。 两个图像叠加在其上的公共输出图像平面显示与两个输入之间的差成比例的强度。 该强度在恒定的背景强度上“骑”,从而显示差分信号及其极性。 读入和读出的光束可以是一致的和非相干的,后者由于其无斑点的图像而更加期望。 目前尚不知道可以执行非相干减法的其他系统。 给出了使用非相干照明获得的实验结果。

    Optical mask for all-optical extended depth-of-field for imaging systems under incoherent illumination
    8.
    发明授权
    Optical mask for all-optical extended depth-of-field for imaging systems under incoherent illumination 有权
    用于非相干照明下成像系统的全光学扩展景深的光学掩模

    公开(公告)号:US08570655B2

    公开(公告)日:2013-10-29

    申请号:US13027286

    申请日:2011-02-15

    IPC分类号: G02B27/46

    摘要: A method of optical element manufacturing, the method may include selecting a range of a misfocus parameter ψ; and designing the optical element to include multiple regions, wherein the optical transfer function (OTF) of the optical element allows, for the range of the misfocus parameter .psi., transmission of images with a contrast of at least 10% for all normalized spatial frequencies up to 50% of a theoretical maximum that is attainable with a full aperture in an in-focus condition.

    摘要翻译: 一种光学元件制造方法,该方法可以包括选择误聚焦参数psi的范围; 以及将所述光学元件设计为包括多个区域,其中所述光学元件的光学传递函数(OTF)允许在所述误聚焦参数的范围内。对于所有归一化空间,具有至少10%的对比度的图像的传输 频率高达理论最大值的50%,可以在对焦条件下使用全孔径来获得。

    Holographic scanning
    9.
    发明授权
    Holographic scanning 失效
    全息扫描

    公开(公告)号:US5504595A

    公开(公告)日:1996-04-02

    申请号:US225350

    申请日:1994-04-08

    CPC分类号: G02B26/106 G06K7/10663

    摘要: A holographic grating element is provided which enables tracing different scan lines. The element is divided into a plurality of sectors. A first grating pattern is provided which diffracts a beam in one direction, and a second grating pattern is next to the first and diffracts the scan beam in the reverse direction. Sectors can be produced with different sector sizes to enable scanning at different rates in the reverse direction, or in successive scans in the same direction. Angle relationships are described to produce diffraction patterns for a desired relationship between disc rotation and the angle of the scan line.

    摘要翻译: 提供了一种能够跟踪不同扫描线的全息光栅元件。 该元件被分成多个扇区。 提供了在一个方向上衍射光束的第一光栅图案,并且第二光栅图案与第一光栅图案相邻,并沿相反方向衍射扫描光束。 扇区可以生产不同的扇区大小,以便能够以相反方向以不同速率进行扫描,也可以在相同方向上进行连续扫描。 描述角度关系以产生用于盘旋转和扫描线的角度之间期望关系的衍射图案。

    Off axis optical communication system
    10.
    发明授权
    Off axis optical communication system 失效
    离轴光通信系统

    公开(公告)号:US4753506A

    公开(公告)日:1988-06-28

    申请号:US902824

    申请日:1986-09-02

    摘要: An improved optical rotary joint is achieved by transmitting information in the form of an optical signal from a part of the de-spun portion outside the rotational axis to create on the spun portion, or vice versa, 360.degree. about the rotational axis, a continuous communication path having a configuration described by a series of overlapping elliptical areas. The detection area on the spun portion is less than that of the detection path thereby providing continuous optical communication with the transmitted optical signal.

    摘要翻译: 改进的光学旋转接头是通过以旋转轴外部的旋转部分的一部分传递光信号的形式的信息来实现的,以在纺纱部分上产生360°,反之亦然,围绕旋转轴线360°连续 通信路径具有由一系列重叠的椭圆区域描述的配置。 旋转部分的检测区域小于检测路径的检测区域,由此提供与发送的光信号的连续的光通信。