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    A method and apparatus for producing a light source of required shape
    12.
    发明公开
    A method and apparatus for producing a light source of required shape 失效
    用于生产所需形状的光源的方法和装置

    公开(公告)号：EP0097257A3

    公开(公告)日：1987-01-07

    申请号：EP83105174

    申请日：1983-05-25

    Applicant: International Business Machines Corporation

    Inventor： Jain, Kantilal ,  Latta, Milton Russell ,  Sincerbox, Glenn Tavernia

    IPC: G02B05/32 ,  G03B41/00

    CPC classification number: G02B5/32 ,  G02B13/22 ,  G03F7/70091 ,  G03F7/7015

    Abstract: Apparatus for producing a light source of a desired shape from a light source such as a laser comprising means for directing the light source along a predetermined path 10 as a playback beam to impinge upon a hologram 12 at a predetermined angle to produce the continuous self-luminous source of the desired shape. The hologram is recorded upon a substrate 28 coated with a photosensitive material 30 by interference between recording and object beams 24, 48 derived from the same source 20 of coherent radiation. The recording beam 24 is directed toward the substrate at an orientation and angle so that the playback beam 10 is a conjugate of the recording beam. The object beam 48 is directed to the substrate 28 over a path which includes a diffuser plate 36 covered with an opaque material in all areas except for a continuous area which defines the desired shape. The part of the object beam which impinges upon the substrate is limited by a stop 17 which defines the numerical aperture.

    Method for constructing and reconstructing hologram
    14.
    发明公开
    Method for constructing and reconstructing hologram 失效
    构造和重构霍洛姆的方法

    公开(公告)号：EP0140594A3

    公开(公告)日：1986-05-14

    申请号：EP84306733

    申请日：1984-10-03

    Applicant: FUJITSU LIMITED

    Inventor： Ikeda, Hiroyuki ,  Yamagishi, Fumio ,  Kato, Masayuki ,  Kitagawa, Shunji ,  Inagaki, Takefumi

    IPC: G03H01/00 ,  G02B05/32

    CPC classification number: G02B5/32 ,  G03H1/00 ,  G03H1/0005 ,  G03H2001/0413 ,  G03H2001/186 ,  G03H2001/2234

    Abstract: A method for constructing and reconstructing a hologram. The hologram is constructed by irriadiating two construction beams (102,103) having different incidence angles (β', a') onto a hologram record medium (101) and forming interference fringe patterns therein by the two construction beams. The hologram is reconstructed by irradiating a reconstruction beam (106) onto the interference fringe patterns so as to diffract the reconstruction beam in accordance with the interference fringe patterns. At least one of the two construction beams irradiates the hologram record medium through at least one optical deviation element (119). The incidence angle, relative to the interference fringe patterns, of the reconstruction beam is different from that of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.

    Viewer with instantaneous enlarged field comprising a mirror and method of manufacturing said mirror
    16.
    发明公开
    Viewer with instantaneous enlarged field comprising a mirror and method of manufacturing said mirror 失效
    具有包含镜子的瞬时扩展场的查看器和制造镜面的方法

    公开(公告)号：EP0104115A3

    公开(公告)日：1984-05-02

    申请号：EP83401787

    申请日：1983-09-13

    Applicant: THOMSON-CSF

    Inventor： Arondel, Patrick ,  Gauthier, François Hugues ,  Levaillant, Denis

    IPC: G02B27/00 ,  G02B05/32

    CPC classification number: G02B27/0103 ,  G02B2027/0109

    Abstract: L'invention concerne un dispositif viseur du type à champ instantané agrandi au moyen d'un miroir holographi que hors axe (5) qui réfléchit les rayons incidents (α2) dans une direction différente (α1) par rapport à sa normale (N). Le miroir holographique (5) est dans une position telle que le champ instantané (ClH) de l'oeil (1) d'un observateur est égal au champ total d'une source lumineuse collimatée, réfléchie sur ce miroir holographique (5). Le miroir holographique (5) peut être est enregistré au moyen de deux sources lumineuses monochromatiques cohérentes situées dans des directions α1 et α2, à l'infini de part et d'autre du miroir holographique ou avec deux sources ponctuelles non à l'infini.

    Holographic optical display system with optimum brigtness uniformity
    17.
    发明公开
    Holographic optical display system with optimum brigtness uniformity 失效
    全光学显示系统，具有最佳的可靠性

    公开(公告)号：EP0200022A3

    公开(公告)日：1988-04-13

    申请号：EP86104568

    申请日：1986-04-03

    Applicant: FLIGHT DYNAMICS, INC.

    Inventor： Wood, Robert B. ,  Hung, Jen-Lih ,  Jee, Norman S.

    IPC: G02B27/00 ,  G02B05/32

    CPC classification number: G02B27/0103 ,  G02B2027/0109 ,  G02B2027/0118

    Abstract: (D An optical display system (10) employs a holographic optical element (20 or 22) that has a holographic fringe pattern which is coordinated with the phosphor emission peak (32) of a cathode ray tube (24) to eliminate perceptible variations in image brightness. The holographic optical element has a reflection characteristic (34) that defines two diffraction efficiency peaks (36 and 38) which are resolved by a low diffraction efficiency dip (40) that is interposed between them. The optimum wavelength spacing between the two diffraction efficiency peaks for a given wavelength spacing is determined by computing for all observer (28) head positions and look angles of concern the differences among the areas under the intergrated efficiency characteristics (42) for the reflection characteristic (30) holographic optical element and the phosphor emission characteristic of the image-producing cathode ray tube. The optimum wavelength spacing is that which provides the desired variation among the computed difference values, which represent the display brightness uniformity. The center dip reflection characteristic increases the spectral bandwidth of the holographic optical element and thereby increases its reflectivity to promote good contrast with the use of a cathode ray tube operating at reduced beam current levels. When installed as a combiner (12 or 14) in a head-up display system (10) for aircraft, the holographic optical element superimposes the image on an outside scene without introducing significant discoloration of the scene.

    Light beam scanning apparatus
    18.
    发明公开
    Light beam scanning apparatus 失效
    光束扫描装置

    公开(公告)号：EP0132956A3

    公开(公告)日：1987-07-29

    申请号：EP84304444

    申请日：1984-06-29

    Applicant: FUJITSU LIMITED

    Inventor： Yamagishi, Fumio ,  Hasegawa, Shinya ,  Ikeda, Hiroyuki ,  Inagaki, Takefumi

    IPC: G02B26/10 ,  G02B05/32

    CPC classification number: G06K15/1285 ,  G02B26/106

    Abstract: In a light beam scanning apparatus using a hologram rotator (1), a post-hologram (9) is provided forfurther diffracting a light beam diffracted by the hologram rotatorto a direction opposite to that in which the light beam was first diffracted. By combining the kinds of wave fronts used for forming the holograms of the hologram rotator (1) and the post-hologram, the light beam scanning apparatus reduces deviation of the light beam scanning position caused by mode hopping of a laser diode, and an improved linear scanning of the light beam and/or image focusing characteristic is obtained.

    Abstract translation: 在使用全息图旋转器（1）的光束扫描设备中，提供后全息图（9），用于进一步衍射由全息图衍射的光束旋转到与光束被首次衍射的方向相反的方向。 通过结合用于形成全息图旋转器（1）的全息图和后全息图的波前的种类，光束扫描装置减小了由激光二极管的模式跳变引起的光束扫描位置的偏差，并且改进了 获得光束的线性扫描和/或图像聚焦特性。

    Process and device for holographically recording objects, especially microfilms
    19.
    发明公开
    Process and device for holographically recording objects, especially microfilms 失效
    用于全息记录物体，特别是微孔的方法和装置

    公开(公告)号：EP0097931A3

    公开(公告)日：1987-05-06

    申请号：EP83106195

    申请日：1983-06-24

    Applicant: ESG Elektronik-System- Gesellschaft mbH

    Inventor： Dausmann, Günther

    IPC: G03H01/06 ,  G02B05/32

    CPC classification number: G02B5/32 ,  G03H1/06

    Abstract: Es wird ein Verfahren zur holographischen Aufnahme von Objekten, insbesondere von Mikrofilmen (MF₁, MF₂), auf einer strahlungsempfindichen, insbesondere lichtempfindli chen Schicht (22) eines Aufnahmehologrammm-Trägers (III) vorgeschlagen, bei welchem Verfahren man die von den Oberflächenpunkten (R₂*, R₃* ...) des Mikrofilms ausgehen den Strahlen auf ein entwickeltes Zwischenhologramm (18) eines Zwischenhologramm-Trägers (II) fallen läßt, welches das mit einer Zwischenhologramm-Referenz-Strahlenquelle (R₂) aufgenommene oder dementsprechend synthetisch er zeugte Hologramm eines Punkthologramms ist, wobei man den Mikrofilm (MF) und den Zwischenhologramm-Träger (II) derart relativ zueinander anordnet, daß die Objektpunkte als örtlich gegeneinander versetzte Zwischenhologramm- Referenz-Strahlenquellen dienen zur Rekonstruktion jeweils eines entsprechenden Punkthologramms in der Aufnahme hologramm-Schicht (22). Dann wird die Aufnahmeholo gramm-Schicht (22) entwickelt und schließlich zur Rekon struktion des aufgenommenen Mikrofilms das Aufnahmeho logramm (III) mit einer Wiedergabe-Referenz-Strahlenquelle (R₁*) bestrahlt, welche derart angeordnet ist, daß die Wie dergabe-Referenz-Strahlenquelle (R₁*) die Punkthologram me der Aufnahmehologramm-Schicht (22) rekonstruiert. Dieses Verfahren kommt ohne kohärente Aufnahme- Strahlenquelle aus.

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