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    • 14. 发明授权
    • Nipi refractive index modulation apparatus and method
    • 尼泊尔折射率调制装置及方法
    • US4784476A
    • 1988-11-15
    • US7298
    • 1987-01-27
    • Joel N. SchulmanUzi Efron
    • Joel N. SchulmanUzi Efron
    • G02F1/015G02F1/017G02F1/01G02F1/03
    • G02F1/017B82Y20/00G02F1/01716G02F2001/0151
    • Various optical modulation systems and methods are disclosed which are based upon modulating the refractive index of a nipi structure. The refractive index modulation is accomplished by applying a controlled voltage differential across the n-doped and p-doped layers of the structure. Staggered contacts to the layers are formed by conductive elements which extend through the structure. One of the elements establishes ohmic contacts with the n layers, and the other with the p-layers. When implemented as an optical spatial phase modulator, one of the nipi contacts is provided as a grid which divides the structure into a matrix of pixel elements, with the other contact comprising separate wires extending through each pixel. A spatial voltage pattern is applied to the pixel wires to inject charge into their corresponding layers, and thereby modulate the refractive indices of the pixels. This imposes a desired spatial phase modulation onto a readout beam transmitted through the nipi structure. Various guided wave applications are also disclosed in which a beam is transmitted through a nipi structure parallel to the n and p layers. The nipi sturcture is not divided into pixels, but rather has a common voltage differential between its n and p layers. The structure's refractive index is spatially modulated by varying this voltage differential, whereby the spatial voltage modulation is transferred onto the beam.
    • 公开了基于调制nipi结构的折射率的各种光学调制系统和方法。 通过在结构的n掺杂和p掺杂层上施加受控电压差来实现折射率调制。 与层交错的触点由延伸穿过结构的导电元件形成。 元素之一与n层建立欧姆接触,而与p层建立欧姆接触。 当实现为光学空间相位调制器时,钳位触点之一被提供为格栅,其将结构分成像素元件的矩阵,而另一个触点包括延伸穿过每个像素的单独的线。 将空间电压图案施加到像素线以将电荷注入其相应的层中,从而调制像素的折射率。 这对通过nipi结构传输的读出光束施加了期望的空间相位调制。 还公开了各种导波应用,其中波束通过平行于n和p层的钳位结构传输。 钳口结构不分为像素,而是在其n层和p层之间具有公共的电压差。 通过改变该电压差来对结构的折射率进行空​​间调制,从而将空间电压调制转移到光束上。
    • 16. 发明授权
    • Low-cost light-weight head-mounted virtual-image projection display with
low moments of inertia and low center of gravity
    • 低成本重量轻的头戴式虚拟投影显示屏,具有低转动惯量和低重心
    • US5822127A
    • 1998-10-13
    • US826856
    • 1997-04-11
    • Chungte W. ChenUzi EfronArthur N. Chester
    • Chungte W. ChenUzi EfronArthur N. Chester
    • G02B27/00G02B27/01G09B9/36G02B27/14
    • G02B27/0172G09B9/36A42B3/042G02B2027/011G02B2027/0132G02B2027/0138
    • A head-mounted display device (10) offers light weight, a low center of gravity, and low moments of inertia about the azimuthal and elevational axes of head movement. The display device (10) employs an angulated beam splitter mirror (16) disposed between a user's (22) eye (20) and an inner combiner surface (18a) of a visor (28). A projector (36) is carried laterally of the user's eye with a low center of gravity and a position close to the horizontal axis of elevational movement of the head. This projector (36) includes an image source (12) and an compact light-weight relay optics module (14) along with a projection fold mirror (30) disposed at eye level and laterally of the beam splitter mirror (16) to project image light to the beam splitter mirror (16). The beam splitter mirror (16) reflects the light onto the inner surface (18a) of the combiner (18) for reflection back through the beam splitter mirror (16) and to the user's eye (20). Alternative embodiments provide for color correction, or for monochrome image projection at even lighter weight. An alternative embodiment provides for both color correction and a weight nearly as light as the monochrome version by use of diffractive lenses in the relay optics module.
    • 头戴式显示装置(10)提供重量轻,重心低,围绕磁头运动的方位和高度轴的低转动惯量。 显示装置(10)使用设置在用户(22)眼睛(20)和面罩(28)的内部组合器表面(18a)之间的角度分束镜(16)。 投影仪(36)以低重心和靠近头部高度运动的水平轴的位置在使用者眼睛的侧面上承载。 该投影仪(36)包括图像源(12)和紧凑型重量轻的中继光学模块(14)以及设置在分光镜(16)的眼睛水平和横向的投影折射镜(30),以投影图像 光束分束镜(16)。 分束镜(16)将光反射到组合器(18)的内表面(18a)上,用于通过分束镜(16)反射回用户的眼睛(20)。 替代实施例提供颜色校正,或者以更轻的重量提供单色图像投影。 替代实施例通过使用中继光学模块中的衍射透镜来提供颜色校正和与单色版本几乎相同的重量。
    • 18. 发明授权
    • Infrared transducer and goggles incorporating the same
    • 红外线传感器和护目镜结合在一起
    • US5389788A
    • 1995-02-14
    • US166790
    • 1993-12-13
    • Jan GrinbergRaymond BalcerakChiung-Sheng WuUzi EfronPaul O. Braatz
    • Jan GrinbergRaymond BalcerakChiung-Sheng WuUzi EfronPaul O. Braatz
    • G01J5/04G01J5/20G02F1/135H01L27/146G02F1/136
    • H01L27/146G02B23/125G02F1/1354H04N5/3651H04N5/33
    • An infrared (IR) radiation transducer integrates an IR detector array with a liquid crystal (LC) readout. The IR detector is preferably a pixelized bolometer array, but other detectors such as pyroelectric materials are possible. To modulate the LC in response to detected IR radiation, a modulating section is provided that includes a charge injection structure which injects electrical charge in response to the detected IR radiation, and a charge transfer structure that transfers the injected charge to the LC readout section. During its active phase the charge transfer layer is depleted of majority charge carriers, and the charge injection and transfer mechanism operates in a manner analogous to a bipolar transistor. A visible readout is obtained by directing readout light through the LC, where it is modulated in accordance with the detected IR image. The transducers are small and light weight enough to be incorporated into a pair of goggles, for which no separate cooling is required.
    • 红外(IR)辐射传感器将IR检测器阵列与液晶(LC)读数器集成。 IR检测器优选地是像素化的测辐射热计阵列,但是其他检测器如热电材料也是可能的。 为了响应于检测到的IR辐射来调制LC,提供了调制部分,其包括响应于检测到的IR辐射而注入电荷的电荷注入结构,以及将注入的电荷传送到LC读出部分的电荷转移结构。 在其活性阶段期间,电荷转移层耗尽多数电荷载流子,并且电荷注入和转移机制以类似于双极晶体管的方式工作。 通过将读出光引导通过LC获得可见读出,其中根据检测到的IR图像进行调制。 传感器体积小巧,重量轻,可以并入一副护目镜,不需要单独的冷却。