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    Image display apparatus
    1.
    发明授权
    Image display apparatus 失效

    公开(公告)号：US3626320A

    公开(公告)日：1971-12-07

    申请号：US3626320D

    申请日：1970-10-05

    Applicant: IBM

    Inventor： GARWIN RICHARD L ,  POLE ROBERT V

    IPC: G02F1/03 ,  H01J29/89 ,  H01S3/107 ,  H04N5/74 ,  H01S3/05 ,  G02F1/28

    CPC classification number: H01J29/89 ,  G02F1/0333 ,  H01J2229/8926 ,  H01S3/107 ,  H04N5/7425

    Abstract: An electro-optic crystal sealed in a cathode-ray tube disposed between the end mirrors of a flat-field focusing laser cavity operates, when scanned by the modulated electron beam to vary the index of refraction of the crystal, to cause it to function as a controllable phase-modulating transducer in an optical system. The phase modulation distributes light into zero and side order beams. The cavity is so designed that it causes the side order light to escape from it, forming an intensity modulated image on a viewing screen in the manner of projection television, while the zero order light is reflected within the cavity to sustain the lasing action.

    Digitalized scanlaser
    2.
    发明授权
    Digitalized scanlaser 失效
    数字扫描仪

    公开(公告)号：US3626317A

    公开(公告)日：1971-12-07

    申请号：US3626317D

    申请日：1970-02-19

    Applicant: IBM

    Inventor： DAKSS MARK L ,  GARWIN RICHARD L ,  POLE ROBERT V

    IPC: G02F1/03 ,  H01S3/101 ,  H01S3/00 ,  G02F1/22

    CPC classification number: H01S3/101 ,  G02F1/0333

    Abstract: Generally, the disclosure describes a scanlaser with a fly''s eye lens array for discretized or digitalized beam steering via mode selection. In a scanlaser, a localized change in birefringence changes the Q of the associated laser cavity so that only certain modes can be sustained in the cavity. A scanlaser in accordance with this disclosure incorporates a fly''s eye lens array which selects only one of the latter modes for lasing in the cavity.

    Method for making secondary holograms from multiplexed holograms or integral photographs wherein the screen effect is eliminated
    3.
    发明授权
    Method for making secondary holograms from multiplexed holograms or integral photographs wherein the screen effect is eliminated 失效
    用于从多个复合的霍乱形成的二次霍尔方法或者屏幕效应被消除的整合照片的方法

    公开(公告)号：US3560070A

    公开(公告)日：1971-02-02

    申请号：US3560070D

    申请日：1968-03-13

    Applicant: IBM

    Inventor： PENNINGTON KEITH S ,  POLE ROBERT V

    IPC: G03H1/16 ,  G03H1/26 ,  G02B27/00

    CPC classification number: G03H1/26 ,  Y10S359/90

    Abstract: A METHOD IS DESCRIBED FOR FORMING SECONDARY HOLOGRAMS FROM EITHER A MULTIPLEXED (I.E. SAMPLED) HOLOGRAM OR FROM AN INTEGRAL PHOTOGRAPH WHEREIN THE SCREEN EFFECT NORMALLY PRODUCED BY EITHER THE MULTIPLEXED HOLOGRAM OR THE INTEGRAL PHOTOGRAPH IS ELIMINATED. AN INTEGRAL PHOTOGRAPH IS A PHOTOGRAPHIC RECORDING OF AN OBJECT THROUGH A PLANE ARRAY OF FLY''S EYES LENSES FROM WHICH THREEDIMENSIONS REAL AND VIRTUAL IMAGES CAN BE LATER OBSERVED. A MULTIPLEXED OR SAMPLED HOLOGRAM IS A HOLOGRAM WHICH IS FORMED BY INTERLACING A PLURALITY OF HOLOGRAMS IN A SINGLE EMULSION USING A MASK PLACED IN THE REFERENCE AND/ OR THE INTEGRAL PHOTOGRAPH IS ELIMINATED. AN INTEGRAL PHOTOGRAPH OR HOLOGRAM OF AN INTEGRAL PHOTOGRAPH, A SCREEN OR GRID EFFECT IS PRODUCED DUE TO THE FACT THAT THE FLY''S EYE LENS ARRAY IS DISCONTINUOUS AND THE AREAS BETWEEN THE LENSES IN THE ARRAY DO NOT RECORD ANY INFORMATION. IN OBSERVING THE IMAGE FROM A MULTIPLEXED HOLOGRAM, A SIMILAR SCREEN OR GRID EFFECT DUE TO THE FACT THAT A MASK WAS EMPLOYED IN PRODUCING A MULTIPLEXED HOLOGRAM. IN THE METHOD OF THE PRESENT INVENTION, A SECONDARY HOLOGRAM IS RECORDED IN THE FOURIER TRANSFORM PLANE OF THE IMAGE AND THE SECONDARY HOLOGRAM PLATE IS TRANSLATED IN THE FOURIER PKANE A NUMBER OF TIMES AND A SEPARATE RECORDING OF THE IMAGE IS SUPERIMPOSED FOR EACH TRANSLATION. SINCE THE SECONDARY HOLOGRAM PLATE IS IN THE FOURIER PLANE OF THE IMAGE, THE IMAGE DOES NOT SHIFT DUE TO THE TRANSLATION OF THE PLATE. HOWEVER, SINCE THE SECONDARY HOLOGRAM PLATE IS NOT IN THE FOURIER PLANE OF THE INTEGRAL PHOTOGRAPH OR THE MULTIPLEXED HOLOGRAM AS THE CAUSE MAY BE, THE GRID WILL BE RECORDED AT DIFFERENT LOCATION ON THE SECONDARY HOLOGRAM FOR EACH TRANSLATION, THAT IS, THE GRID WILL SHIFT DUE TO THE TRANSLATION OF THE HOLOGRAM. THE SHIFTING OF THE GRID FOR THE SUCCESSIVE RECORDINGS WILL CAUSE IT TO SMEAR OUT AND WILL NOT BE VIEWABLE IN THE RESULTANT SECONDARY HOLOGRAM.

    Two-dimensional acousto-optic deflection system
    5.
    发明授权
    Two-dimensional acousto-optic deflection system 失效
    二维ACOUSTO-OPTIC偏转系统

    公开(公告)号：US3633996A

    公开(公告)日：1972-01-11

    申请号：US3633996D

    申请日：1970-03-04

    Applicant: IBM

    Inventor： LEAN ERIC G ,  POLE ROBERT V ,  TSENG SAMUEL C

    IPC: G02F1/33 ,  G02F1/16

    CPC classification number: G02F1/33

    Abstract: A system for deflecting a light beam in two dimensions is described. The system includes a piezoelectric crystal having an acoustic surface wave transducer on its surface for propagating acoustic surface waves on the crystal. Means are provided for applying a nonuniform electric field to the crystal to vary the effective stiffness constant of the crystal in a nonuniform manner. When a beam of laser light is directed onto the crystal it is deflected in one dimension as a function of the frequency of the acoustic wave produced by the transducer and in a second dimension as a function of the nonuniform electric field.

    Abstract translation: 描述了一种用于在两个维度上偏转光束的系统。 该系统包括在其表面上具有声表面波换能器的压电晶体，用于在晶体上传播声表面波。 提供了用于向晶体施加不均匀电场的装置，以不均匀的方式改变晶体的有效刚度常数。 当激光束被引导到晶体上时，其作为由换能器产生的声波的频率的函数在一维中被偏转，并且在作为不均匀电场的函数的第二维度中被偏转。

    Acousto-optic light deflection system
    7.
    发明授权
    Acousto-optic light deflection system 失效
    ACOUSTO光学折射系统

    公开(公告)号：US3633995A

    公开(公告)日：1972-01-11

    申请号：US3633995D

    申请日：1970-02-17

    Applicant: IBM

    Inventor： LEAN ERIC G ,  PENNINGTON KEITH S ,  POLE ROBERT V ,  POWELL CARL G

    IPC: G02F1/33 ,  H01S3/101 ,  G02F1/28 ,  H01S3/00

    CPC classification number: H01S3/101 ,  G02F1/332

    Abstract: A system for deflecting a light beam such as a laser beam including a crystal substrate, preferably piezoelectric, having a reflective coating on its surface which functions as a mirror. At least one surface acoustic wave transducer is mounted on the crystal and is actuated by a high-frequency signal source. The transducer propagates surface acoustic waves on the crystal, which produce a periodic deformation on the mirror surface which functions as a phase grating. A light beam directed onto the mirror surface will therefore be deflected at an angle dependent on the acoustic frequency of the surface waves. A plurality of transducers arranged approximately in a semicircle on the crystal and selectively actuated provides a two-dimensional scanning system.

    Abstract translation: 一种用于偏转光束的系统，该激光束包括晶体衬底，优选为压电体，其表面上具有反射涂层，其用作反射镜。 至少一个表面声波传感器安装在晶体上并由高频信号源致动。 传感器传播晶体上的表面声波，其在镜面上产生周期性变形，其用作相位光栅。 因此，指向镜面的光束将以取决于表面波的声频的角度偏转。 在晶体上大致半圆形布置并选择性地致动的多个换能器提供二维扫描系统。

    Electron beam addressed digital scanlaser
    8.
    发明授权
    Electron beam addressed digital scanlaser 失效
    电子束寻址数字扫描仪

    公开(公告)号：US3555454A

    公开(公告)日：1971-01-12

    申请号：US3555454D

    申请日：1968-07-15

    Applicant: IBM

    Inventor： MYERS ROBERT A ,  POLE ROBERT V

    IPC: H01S3/101 ,  H01S3/02

    CPC classification number: H01S3/101

    Abstract: A SCANLASER IS A DEVICE FOR EMITTING A BEAM OF COHERENT, LASER RADIATION FROM A DESIRED POINT OR AT A CONTROLLED ANGLE OF DEFLECTION. AN OPTICAL RESONATOR, CAPABLE OF SUPPORTING A LARGE NUMBER OF TRANSVERSE MODES OF OSCILLATION DRIVEN BY AN ASSOCIATED ACTIVE LASER MEDIUM, IS CONTROLLED BY AN ELECTRON BEAM TO ALLOW OSCILLATION ONLY IN CHOSEN MODES, THEREBY CONTROLLING THE ANGLE OF BEAM DEFLECTION OR POSITION OF BEAM EMISSION. A POLARIZER AND A BIREFRINGENT PLATE ARE USED AS A BIASING LIGHT ATTENUATOR TO SPOIL ALL OSCILLATORY MODES, THEREBY PREVENTING OSCILLATION. THE ELECTRON BEAM CHANGES SELECTED CONDUCTIVE, REFLECTING STRIPS WHICH CREATE AN ELECTROSTATIC FIELD IN STRIP-

    LIKE REGIONS OF AN ELECTRO-OPTIC CRYSTAL. THE FIELD-INFLUENCED STRIP-LIKE REGIONS OF THE CRYSTAL ARE THUS MADE BIREFRINGENT TO COMPENSATE FOR THE BIREFRINGENCE OF THE PLATE, THEREBY REDUCING ATTENUATION AND ALLOWING OSCILLATION OF ELECTRON-BEAM SELECTED MODES. EXTERNAL RESISTORS TO GROUND PROVIDE CONTROLLED LEAKAGE PATHS TO REDUCE OR CONTROL CHARGE PERSISTENCE IN THE CONDUCTIVE STRIPS.

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