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    • 1. 发明授权
    • Phased array for optical beam control
    • 光束控制相控阵
    • US5151814A
    • 1992-09-29
    • US673175
    • 1991-03-18
    • Jan GrinbergThomas R. O'MearaYuri OwechkoMelvin E. PedinoffBernard H. Soffer
    • Jan GrinbergThomas R. O'MearaYuri OwechkoMelvin E. PedinoffBernard H. Soffer
    • G02F1/1343G02F1/1347G02F1/139G02F1/29
    • G02B27/0087G02F1/292G02F1/134336G02F1/1347G02F1/1393G02F2203/01G02F2203/02G02F2203/24
    • 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.
    • 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。
    • 4. 发明授权
    • Method and apparatus for ultra high frequency spectrum analysis
    • 用于超高频谱分析的方法和装置
    • US4871232A
    • 1989-10-03
    • US130032
    • 1987-12-07
    • Jan GrinbergEmanuel MaromBernard H. SofferThomas R. O'MearaAdrian E. Popa
    • Jan GrinbergEmanuel MaromBernard H. SofferThomas R. O'MearaAdrian E. Popa
    • G01R23/17
    • G01R23/17
    • 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.
    • 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。
    • 7. 发明授权
    • Liquid crystal adaptive optics system
    • 液晶自适应光学系统
    • US4943709A
    • 1990-07-24
    • US350353
    • 1989-05-11
    • Jan GrinbergThomas R. O'Meara, Jr.Murray S. Welkowsky
    • Jan GrinbergThomas R. O'Meara, Jr.Murray S. Welkowsky
    • G01J9/02
    • G01J9/02
    • An adaptive optics system is disclosed which has a phase detector to detect phase distortions acquired by an input beam, and a separate phase adjustor which predistorts a transmission beam so that it is restored to its proper phase during transmission back through the same medium travelled by the input beam. The phase adjustor consists of a liquid crystal mechanism with an area substantially greater than that of the phase detector, thereby permitting high power operation. Liquid crystal pixels in the phase adjustor have dual transistor signal storage circuits which apply operating signals to the pixels without significant decay or flicker. The phase adjustor can be constructed in either a reflective or transmissive mode. Two phase adjustors may be placed in series to enhance response time and/or process an unpolarized beam. A data processor interfaces between the phase detector and phase adjustor. The data processor may include a capability for providing phase adjustment information for a plurality of transmission wavelengths based upon the detected distortion of an input beam at only one of the wavelengths.
    • 公开了一种自适应光学系统,其具有用于检测由输入光束获取的相位失真的相位检测器,以及单独的相位调节器,其预发射发射光束,使得在透射期间通过相同介质返回到其适当的相位 输入光束。 相位调节器由具有比相位检测器的面积大得多的面积的液晶机构构成,由此允许高功率运转。 相位调节器中的液晶像素具有双晶体管信号存储电路,其对像素施加操作信号而没有显着的衰减或闪烁。 相位调节器可以以反射或透射模式构成。 两个相位调节器可以串联放置以增强响应时间和/或处理非偏振光束。 相位检测器和相位调节器之间的数据处理器接口。 数据处理器可以包括基于在仅一个波长处的检测到的输入波束的失真来提供多个发射波长的相位调整信息的能力。
    • 8. 发明授权
    • Architecture and method of coupling electromagnetic energy to thermal detectors
    • 将电磁能耦合到热探测器的结构和方法
    • US06329655B1
    • 2001-12-11
    • US09414989
    • 1999-10-07
    • Michael D. JackMichael RayJohn VaresiJan GrinbergHarold FettermanFranklin A. Dolezal
    • Michael D. JackMichael RayJohn VaresiJan GrinbergHarold FettermanFranklin A. Dolezal
    • G01J500
    • G01J5/02G01J5/023G01J5/08G01J5/0837G01J5/20H01Q1/22H01Q9/28H01Q21/24
    • A radiation sensor. The inventive sensor has a two-level detector structure formed on a substrate in which a thermal detector element is suspended over the substrate as a microbridge structure. A receiver of electromagnetic radiation is provided on the same side of the substrate in a manner that efficiently couples the radiation field to the thermal detector element. The thermal detector element has a sandwich structure including a heater metal layer, a dielectric layer, and a thin film thermo-resistive material. The thermal detector element is suspended out of physical contact with the receiver. In one embodiment, the receiver is an antenna having a crossed bowtie configuration that efficiently couples the radiation field to the detector element. The inventive radiation sensors are especially useful for mm-wave and microwave sensing applications. The sensor can be used individually or in linear or two-dimensional arrays thereof. The invention also is directed to a method of fabricating such a radiation sensor.
    • 辐射传感器。 本发明的传感器具有形成在基板上的两级检测器结构,其中热探测器元件作为微桥结构悬挂在基板上。 将电磁辐射的接收器以有效地将辐射场耦合到热检测器元件的方式设置在基板的相同侧上。 热检测器元件具有包括加热器金属层,电介质层和薄膜耐热材料的夹层结构。 热探测器元件与接收器物理接触被暂停。 在一个实施例中,接收机是具有交叉的弓形结构的天线,其将辐射场有效地耦合到检测器元件。 本发明的辐射传感器对于毫米波和微波感测应用特别有用。 传感器可以单独使用或以其线性或二维阵列使用。 本发明还涉及一种制造这种辐射传感器的方法。
    • 10. 发明授权
    • Electron beam addressed liquid crystal light valve
    • 电子束寻址液晶光阀
    • US4728174A
    • 1988-03-01
    • US927580
    • 1986-11-06
    • Jan GrinbergNobuo J. KodaPhillip G. ReifWilliam P. Bleha, Jr.Murray S. WelkowskyArno G. Ledebuhr
    • Jan GrinbergNobuo J. KodaPhillip G. ReifWilliam P. Bleha, Jr.Murray S. WelkowskyArno G. Ledebuhr
    • G02F1/13G02F1/133G02F1/1333G09F9/35G09G3/18
    • G02F1/133348
    • An electron beam addressed crystal light valve (LCLV) produces an AC voltage across a liquid crystal layer from a single polarity electron beam, and exhibits very high resolution. A mirror and a thin layer of partially conductive material are deposited on a support membrane on the electron beam side of the liquid crystal. The partially conductive layer is divided into a series of pixel elements by a conductive matrix which faces the electron beam. Electrons from the beam are absorbed by the partially conductive layer to establish a negative voltage across the liquid crystal, and then flow out to the conductive matrix to produce an AC voltage prior to the next electron beam scan. The conductive matrix is connected in circuit with a transparent electrode which provides a voltage reference on the readout side of the liquid crystal. The elements of the device are designed with electrical parameters that produce a discharge rate from the partially conductive layer fast enough to complete an AC cycle between successive electron beam scans, but slow enough for the liquid crystal to respond and produce an image.
    • 电子束寻址晶体光阀(LCLV)从单极性电子束产生跨液晶层的交流电压,表现出非常高的分辨率。 在液晶的电子束侧的支撑膜上沉积有反射镜和薄层的部分导电材料。 部分导电层通过面向电子束的导电矩阵分成一系列像素元件。 来自光束的电子被部分导电层吸收,以在液晶两端建立负电压,然后在下一个电子束扫描之前流出到导电矩阵以产生交流电压。 导电矩阵与在液晶的读出侧提供电压基准的透明电极连接在一起。 器件的元件设计有电气参数,其从部分导电层产生放电速率足够快以在连续的电子束扫描之间完成AC循环,但是足够慢以使液晶响应并产生图像。