利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

64 条记录 (耗时 0.009 秒)

    Dynamic hologram recording
    51.
    发明公开
    Dynamic hologram recording 失效
    动态HOLOGRAM记录

    公开(公告)号：EP0210012A3

    公开(公告)日：1988-03-02

    申请号：EP86305223

    申请日：1986-07-07

    申请人： STC PLC

    发明人： Crossland, William Alden ,  Ross, Peter William ,  Collings, Neil

    IPC分类号： G03H01/04 ,  G02F01/13

    CPC分类号： G02F1/132 ,  G02F1/3534 ,  G03H1/04 ,  Y10S359/90

    摘要： Optical four wave mixing is provided by interfering two waves on a liquid crystal layer (1) temperature stabilised just beneath its nematic/isotropic phase change transition temperature. The liquid crystal incorporates a guest dye to absorb the light producing a holographic thermal image which is accompanied by a holographic phase image. Once this phase image starts to build up it is illuminated with a 'third wave' of light that is not absorbed so as to produce the required holographically diffracted 'fourth wave'.

    Improvements in or relating to iris and shutter arrangements
    52.
    发明公开
    Improvements in or relating to iris and shutter arrangements 失效
    改进或相关于IRIS和SHUTTER安排

    公开(公告)号：EP0204471A3

    公开(公告)日：1987-09-16

    申请号：EP86303928

    申请日：1986-05-23

    申请人： English Electric Valve Company Limited

    发明人： Moody, Michael Henry

    IPC分类号： G03B09/02 ,  G02F01/13

    CPC分类号： H04N5/238 ,  G02F1/134309 ,  G03B9/02

    摘要： @ An iris and shutter arrangement for camera, particularly a CCD camera, is provided in which a first liquid crystal display is formed of a plurality of concentric annuli of liquid crystal material and a second liquid crystal display is provided as a further plurality of coaxial annuli each of which overlies the space separating one annuli from the next in the first display. The first display also includes a relatively clear central circular area, defining the smallest aperture desired, which is covered by a circular area of liquid crystal material in the second display. The annuli in both cases are continuous save for breaks along a line forming a path for controlling conductors deposited upon the faceplates of the two displays.

    High speed electro-optical light gate and field sequential full color display system incorporating same
    54.
    发明公开
    High speed electro-optical light gate and field sequential full color display system incorporating same 失效
    高速电光门和场同步全彩色显示系统

    公开(公告)号：EP0138455A3

    公开(公告)日：1987-01-07

    申请号：EP84306551

    申请日：1984-09-26

    申请人： TEKTRONIX, INC.

    发明人： Bos, Philip J.

    IPC分类号： G02F01/01 ,  G02F01/13

    CPC分类号： G02F1/13473 ,  G02F1/03 ,  G02F1/133533 ,  G02F1/1395

    摘要： A high-speed electro-optical light gate (40) includes a pair of matched variable optical retarders (54 and 56) positioned between a pair of light polarizing filters (42 and 44) to promote rapid switching between optical transmission states for light rays of the wavelength to which the variable optical retarders are tuned. The projections (62 and 66) of the optic axes of the variable optical retarders are orthogonally aligned so that the response time characteristics of the transitions between optical transmission states of the light gate reflect only the turn-on time response characteristic of the variable optical retarders. A field sequential color display system (78) incorporates a switchable color filter (80) which utilizes the alignment configuration of the variable optical retarders of the light gate to provide light output states of white light and light of three different colors to form an image in full color.

    Laser addressed smectic displays
    55.
    发明公开
    Laser addressed smectic displays 失效
    激光寻址智能显示

    公开(公告)号：EP0168973A3

    公开(公告)日：1986-09-17

    申请号：EP85304301

    申请日：1985-06-17

    申请人： STC PLC

    发明人： Crossland, William Alden ,  Davey, Anthony Bernard ,  Walker, Christopher John Joseph

    IPC分类号： G02F01/13

    CPC分类号： G02F1/132 ,  G02F1/1375 ,  G02F1/13781

    摘要： 57 A laser beam addressed smectic display in which the laser beam is used to write clear tracks in an optically scattering field employs an anisotropic conductivity dopant in the liquid crystal filling so that the cell can be electrically set into the scattering state by means of electrohydrodynamic instability effects. This requires the use of a laser light absorbing dye that is not only photochemically stable, but also stable against the effects of the relatively high fields and currents present when the cell is being set into the scattering state.

    Electro-optic switching system using circularly polarized light
    58.
    发明公开
    Electro-optic switching system using circularly polarized light 失效
    使用圆极化的光电开关系统

    公开(公告)号：EP0147098A3

    公开(公告)日：1985-08-21

    申请号：EP84308444

    申请日：1984-12-05

    申请人： TEKTRONIX, INC.

    发明人： Buzak, Thomas S.

    IPC分类号： G02F01/13

    CPC分类号： G02F1/133528 ,  G02F1/03 ,  G02F1/0322 ,  G02F1/13471 ,  G02F2001/133638

    摘要： A method and an apparatus provide an optical switching system (100) which maintains essentially constant transmissivity at its maximum value and develops independent of viewing angle two system optical- transmission states of substantially contaminant-free light. The system includes first and second light gates (102 and 104) of which each has associated therewith contaminant light intensity patterns (48 and 66) with points of local maxima (54, 56, 58, 60, 68, and 70) and local minima (62 and 72) in two system optical transmission states. Quarter-wave plates (134 and 136) are positioned between the light gates to develop circular polarization of light propagating between them. The presence of circularly polarized light maintains the system transmissivity at its maximum value while the relative orientation of the light gates is changed to align their contaminant light intensity patterns to block the transmission of contaminant light, and thereby improve the viewing angle performance.