Image display apparatus of liquid crystal valve projection type
    1.
    发明授权
    Image display apparatus of liquid crystal valve projection type 失效
    液晶阀投影型图像显示装置

    公开(公告)号:US4389096A

    公开(公告)日:1983-06-21

    申请号:US237471

    申请日:1981-02-23

    摘要: A liquid crystal light valve projection type image display apparatus comprises an electro-optic element and a Schlieren optical system. The electro-optic element has a liquid crystal layer having a dielectric and optical anisotropy. An electric field having a spatial intensity distribution according to an image signal is applied to said liquid crystal at a spatial period, so that a spatially phase-modulated phase diffraction grating is formed in the liquid crystal layer. Thus, a projected image in enlarged form is obtained. The fact that the electric field with a spatial period is applied to the liquid crystal leads to a constant light diffraction angle, and the modulation of the diffraction light intensity in the applied electric field enables an image corresponding to the input image signal to be projected at high light utilization.

    摘要翻译: 液晶光阀投影型图像显示装置包括电光元件和施利伦光学系统。 电光元件具有电介质和光学各向异性的液晶层。 具有根据图像信号的空间强度分布的电场以空间周期施加到所述液晶,使得在液晶层中形成空间相位调制的相位衍射光栅。 因此,获得放大的投影图像。 将具有空间周期的电场施加到液晶的事实导致恒定的光衍射角,并且所施加的电场中的衍射光强度的调制使得能够将对应于输入图像信号的图像投影在 光利用率高。

    Field-emission electron source and method of manufacturing the same
    4.
    发明授权
    Field-emission electron source and method of manufacturing the same 失效
    场发射电子源及其制造方法

    公开(公告)号:US5897790A

    公开(公告)日:1999-04-27

    申请号:US995839

    申请日:1997-12-22

    IPC分类号: H01J9/02 B44C1/22

    CPC分类号: H01J9/025 H01J2201/30426

    摘要: A withdrawn electrode is formed on a silicon substrate with intervention of upper and lower silicon oxide films each having circular openings corresponding to regions in which cathodes are to be formed. Tower-shaped cathodes are formed in the respective openings of the upper and lower silicon oxide films and of the withdrawn electrode. Each of the cathodes has a sharply tapered tip portion having a radius of 2 nm or less, which has been formed by crystal anisotropic etching and thermal oxidation process for silicon. The region of the silicon substrate exposed in the openings of the upper and lower silicon oxide films and the cathode have their surfaces coated with a thin surface coating film made of a material having a low work function.

    摘要翻译: 引出电极形成在硅衬底上,介于上和下氧化硅膜之间,每个氧化硅膜具有对应于其中将形成阴极的区域的圆形开口。 在上下氧化硅膜和引出电极的各个开口中形成塔状阴极。 每个阴极具有通过晶体各向异性蚀刻和硅的热氧化工艺形成的具有2nm或更小半径的尖锐尖端部分。 暴露在上,下氧化硅膜和阴极的开口中的硅衬底的区域的表面涂覆有由具有低功函数的材料制成的薄表面涂膜。

    Optical pickup head
    5.
    发明授权
    Optical pickup head 失效
    光学拾音头

    公开(公告)号:US5301182A

    公开(公告)日:1994-04-05

    申请号:US868939

    申请日:1992-04-16

    IPC分类号: G11B7/09 G11B7/135 G11B7/00

    CPC分类号: G11B7/1362 G11B7/1353

    摘要: An optical pickup head for operating on an information recording medium includes a light source for emitting a light beam. A transparent base plate has opposite surfaces formed with a semitransparent film and a hologram respectively. The semitransparent film is exposed to the light beam emitted from the light source, and reflects a portion of the light beam emitted from the light source. The portion of the light beam which is reflected by the semitransparent film forms a forward light beam. A condenser optical system serves to focus the forward light beam on the information recording medium. The forward light beam is reflected at the information recording medium, and forms a backward light beam. The backward light beam successively passes through the condenser optical system, the semitransparent film, and the transparent base plate, and then reaches the hologram. The hologram generates a backward +1-order diffraction light beam from the backward light beam. A plurality of photodetectors serve to receive the +1-order diffraction light beam and to convert the received +1-order diffraction light beam into corresponding electric signals respectively.

    摘要翻译: 用于在信息记录介质上操作的光学拾取头包括用于发射光束的光源。 透明基板分别具有形成半透明膜和全息图的相对表面。 半透明膜暴露于从光源发射的光束,并且反射从光源发射的光束的一部分。 由半透明膜反射的光束部分形成正向光束。 聚光器光学系统用于将前向光束聚焦在信息记录介质上。 正向光束在信息记录介质上被反射,形成反向光束。 后向光束依次通过聚光系统,半透明膜和透明基板,然后到达全息图。 全息图从后向光束产生反向+ 1级的衍射光束。 多个光电探测器用于接收+ 1级衍射光束并将接收到的+1级衍射光束分别转换为相应的电信号。

    Movable optical head integrally incorporated with objective lens and
hologram element
    8.
    发明授权
    Movable optical head integrally incorporated with objective lens and hologram element 失效
    整体结合物镜和全息元件的可移动光学头

    公开(公告)号:US5648951A

    公开(公告)日:1997-07-15

    申请号:US415764

    申请日:1995-04-03

    摘要: Disclosed is a compact optical pick-up head apparatus suitable for mass-production, which comprises a light radiation source, an element composed of photodetector split into a plurality of regions and integrated on the same base, an objective lens for focusing a beam from the above source on an optical disk, a blazed hologram integrated to the support member of the lens, a means for driving the support member to which the objective lens and blazed hologram are integrated in response to an output as servo signal output from the photodetector which receives a diffracted beam produced in such a manner that a return beam reflected or diffracted by the optical disk is incident on the objective lens integrated with the above hologram. The optical pickup apparatus according to the present invention employs a region-split-type phase hologram in which a pair of Flesnel zone plate-like patterns, by which a plurality of diffraction wavefronts having a different focus and the same diffraction order are produced outside an optical-axis, are non-superimposedly formed. The above hologram can be blazed with a pinpoint accuracy by lithography using a few mask patterns synthesized by a computer, and further a more preferably blazing can be realized by the combination of the ion beam etching and the lithography. Accordingly, not only noise caused by an unnecessary diffracted beam component but also the offset of a servo signal can be restrained and the size of the objective lens can be reduced by the integration of the entire optical system, which greatly contributes to the superminiaturization of an optical head.

    摘要翻译: 公开了一种适用于批量生产的紧凑型光学拾取头装置,其包括光辐射源,由分离成多个区域并集成在同一基底上的光电检测器构成的元件,用于将来自 在光盘上的源极上,与透镜的支撑构件集成的闪耀的全息图,用于驱动支撑构件的装置,物镜和闪耀的全息图响应于作为从接收到的光电检测器输出的伺服信号的输出而被集成到该支撑构件上 以使得由光盘反射或衍射的返回光束入射到与上述全息图集成的物镜上的方式产生的衍射光束。 根据本发明的光学拾取装置采用区域分割型相位全息图,其中一对Flesnel区域板状图案,其中具有不同焦点和相同衍射级的多个衍射波前在外部产生 光轴不叠加地形成。 通过使用由计算机合成的几个掩模图案通过光刻可以使上述全息图以精确的准确度闪耀,并且还可以通过离子束蚀刻和光刻的组合来实现更好的燃烧。 因此,不仅可以抑制由不必要的衍射光束分量引起的噪声,而且可以抑制伺服信号的偏移,并且可以通过整个光学系统的整合来减小物镜的尺寸,这极大地有助于使 光头。

    Field-emission element having a cathode with a small radius
    9.
    发明授权
    Field-emission element having a cathode with a small radius 失效
    具有半径小的阴极的场发射元件

    公开(公告)号:US5502314A

    公开(公告)日:1996-03-26

    申请号:US269676

    申请日:1994-07-01

    申请人: Yoshikazu Hori

    发明人: Yoshikazu Hori

    CPC分类号: H01J1/3042 H01J9/025

    摘要: The invention is a field-emission element that is fabricated by forming an elevated surface and a base surface on a conductive substrate or a semiconductor substrate by applying a photolithographic process and an etching process, and making these surfaces cross at a step with an acute angle between the two surfaces. The intersection of the elevated surface with the step form a cathode having a radius of curvature of less than 20 nm. A gate electrode formed on the base electrode but insulated therefrom is disposed at a distance less than 1 .mu.m from said cathode by controlling the distance by the thickness of an etching protection mask. The field-emission element enables electrons to be emitted from the cathode when a voltage less than 150V is applied between the cathode and the gate electrode.

    摘要翻译: 本发明是通过应用光刻工艺和蚀刻工艺在导电衬底或半导体衬底上形成升高的表面和基底表面而制成的场致发射元件,并使这些表面以锐角 在两个表面之间。 升高的表面与台阶的交点形成具有小于20nm的曲率半径的阴极。 通过将距离除以蚀刻保护掩模的厚度,将形成在基极上但与之绝缘的栅电极设置在距离阴极小于1μm的距离处。 当在阴极和栅电极之间施加小于150V的电压时,场发射元件使得能够从阴极发射电子。

    Hyperbolic navigation receiver
    10.
    发明授权
    Hyperbolic navigation receiver 失效
    双曲线导航接收机

    公开(公告)号:US4496951A

    公开(公告)日:1985-01-29

    申请号:US336327

    申请日:1981-12-31

    CPC分类号: G01S1/026 G01S1/306 H03L7/23

    摘要: A hyperbolic navigation receiver locates ships, and the like, by phase-locking the output signal of the voltage-controlled oscillator or voltage-controlled phase shifter of respectively provided tracking loop filters corresponding to the incoming signals from a master and slave station. The voltage-controlled oscillator or voltage-controlled phase shifter is caused to produce an output signal which is a multiple frequency of the incoming signal. Phase discrimination of the output signals is undertaken without the use of a multiplier.

    摘要翻译: 双曲线导航接收器通过锁定相应于来自主站和从站的输入信号的分别提供的跟踪环路滤波器的压控振荡器或电压控制移相器的输出信号来定位船舶等。 使压控振荡器或压控移相器产生作为输入信号的多个频率的输出信号。 在不使用乘法器的情况下进行输出信号的相位辨别。