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80 条记录 (耗时 0.013 秒)

    Acousto-optic filter having an increased optical beam aperture
    1.
    发明授权
    Acousto-optic filter having an increased optical beam aperture 失效
    具有增加光学光束孔径的光学滤光片

    公开(公告)号：US3740117A

    公开(公告)日：1973-06-19

    申请号：US3740117D

    申请日：1971-07-22

    申请人： HEWLETT PACKARD CO

    发明人： HUBBY L

    IPC分类号： G02F1/11 ,  G02F1/24

    CPC分类号： G02F1/116

    摘要： In an acousto-optic filter a prism, cut at a complimentary angle to the inclined input face of the photoelastic birefringent crystal, is disposed between the light source and the crystal. An index of refraction matching medium is disposed in a gap between the input face to the crystal and the parallel output face of the prism such that the input light beam, which is directed perpendicular to the input face of the prism is diffracted by the prism and by the index matching medium along a path within the crystal which is collinear with an excited acoustic wave within the crystal, whereby a maximum optical beam aperture size is obtained. A similar prism with an index of refraction matching medium is disposed at the output end of the crystal for retaining the maximum optical beam aperture at the output end of the filter.

    摘要翻译： 在声光滤波器中，与光弹性双折射晶体的倾斜输入面切割的棱镜被设置在光源和晶体之间。 折射率匹配介质的折射率设置在晶体的输入面和棱镜的平行输出面之间的间隙中，使得垂直于棱镜的输入面的输入光束被棱镜衍射， 通过与晶体内的激发声波共线的晶体内的路径的折射率匹配介质，由此获得最大光束孔径尺寸。 具有折射率匹配介质的类似棱镜设置在晶体的输出端，用于保持滤光器输出端的最大光束孔径。

    Acousto-optic filter having means for damping acoustic resonances and stray light
    2.
    发明授权
    Acousto-optic filter having means for damping acoustic resonances and stray light 失效
    具有抑制声学和谐光的手段的光学滤镜

    公开(公告)号：US3729250A

    公开(公告)日：1973-04-24

    申请号：US3729250D

    申请日：1971-07-23

    申请人： HEWLETT PACKARD CO

    发明人： HUBBY L ,  KUSTERS J ,  WILSON D

    IPC分类号： G02F1/11 ,  G10K11/00 ,  G02F1/24

    CPC分类号： G10K11/002 ,  G02F1/116

    摘要： Acoustic resonances in the acoustically excited photoelastic optically birefringent crystal of an acousto-optic filter are damped by coating the side of the photoelastic crystal with an acoustic absorbing medium, such as tungsten powder loaded epoxy, whereby undesired acoustic resonances are damped. The acoustic impedance of the coating preferably matches the acoustic impedance of the crystal. The outside surface of the crystal is preferably cleaned and roughened to assure an intimate bond between the absorbing material and the crystal medium.

    摘要翻译： 声光滤波器的声学激发的光弹性光学双折射晶体中的声共振通过用吸声介质（例如载有钨粉末的环氧树脂）涂覆光弹性晶体的一侧而被阻尼，由此不期望的声共振被阻尼。 涂层的声阻抗优选与晶体的声阻抗匹配。 晶体的外表面优选地被清洁和粗糙化以确保吸收材料和晶体介质之间的紧密结合。

    Light modulation in optic fiber
    3.
    发明授权
    Light modulation in optic fiber 失效
    光纤光调制

    公开(公告)号：US3645603A

    公开(公告)日：1972-02-29

    申请号：US3645603D

    申请日：1969-09-24

    申请人： LUTHER W SMITH

    发明人： SMITH LUTHER W

    IPC分类号： G02B6/00 ,  G02F1/01 ,  G02F1/24 ,  G02B5/14

    CPC分类号： G02F1/0134

    摘要： Light is modulated in an optic fiber by applying compression across diameters of the fiber angularly displaced from one another and axially displaced from one another along the fiber. Independent phase modulation is achieved by varying the compression applied across the diameters equally and with the same direction. Independent amplitude modulation is achieved by varying the compression applied across the diameters equally and with opposite polarity directions.

    摘要翻译： 通过在纤维的直径上施加压缩而将光调制在光纤中，所述纤维彼此成角度地移位并沿着纤维彼此轴向移位。 独立的相位调制是通过改变在直径上等效且相同方向施加的压缩来实现的。 独立的幅度调制是通过等效地和以相反极性方向改变施加在直径上的压缩来实现的。

    Z-cut crystal electro-optical modulator
    5.
    发明授权
    Z-cut crystal electro-optical modulator 失效
    Z型切割晶体电光调制器

    公开(公告)号：US3572898A

    公开(公告)日：1971-03-30

    申请号：US3572898D

    申请日：1968-08-12

    申请人： INT STANDARD ELECTRIC CORP

    发明人： EAGLESFIELD CHARLES CECIL

    IPC分类号： G02F1/03 ,  G02F1/24

    CPC分类号： G02F1/0322

    摘要： A plurality of Z-cut KDP-type crystal optical modulators, each having a fast axis and a retard axis associated therewith, are arranged in a stack so as to require a potential lower than that required for modulation utilizing a single crystal. Each crystal is formed with an annular recess around a center island on the upper and lower surface and recessed tails extending, in orthogonal relationship one to the other, from each annular recess. The crystals are stacked with alternate plates similarly aligned and adjacent plates oppositely aligned with respect to their fast and retard axes. A conductor is connected between each annular recess and one of two terminals of a source of potential in such manner that the effect of successive plates is additive.

    Digital optical focal length modulator
    6.
    发明授权
    Digital optical focal length modulator 失效

    公开(公告)号：US3565510A

    公开(公告)日：1971-02-23

    申请号：US3565510D

    申请日：1969-04-07

    申请人： PHILIPS CORP

    发明人： SCHMIDT UWE

    IPC分类号： G02B27/40 ,  G02F1/31 ,  G02B1/08 ,  G02F1/24

    CPC分类号： G02F1/31

    摘要： A DIGITAL FOCAL LENGTH MODULATOR ASSEMBLY WHERE A NUMBER OF ELECTRO-OPTICALLY CONTROLLED ALIGNED STAGES, DIGITALLY CONTROL THE FOCAL LENGTH OF THE ASSEMBLY. IN EACH STAGE OF THE ASSEMBLY AN ELECTRO-OPTICALLY CONTROLLED POLARIZER DIGITALLY ALTERS THE EFFECTIVE FOCAL LENGTH OF A PAIR OF BIREFRINGENT LENSES. THE EFFECTIVE CURVATURE OF THE LENSES PROGESSIVELY INCREASES ALONG THE ASSEMBLY.