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80 条记录 (耗时 0.011 秒)

    Acousto-optic band reject light filter and apparatus using same
    61.
    发明授权
    Acousto-optic band reject light filter and apparatus using same 失效
    ACOUSTO-OPTIC BAND REJECT LIGHT FILTER AND APPARATUS USING SAME

    公开(公告)号：US3644015A

    公开(公告)日：1972-02-22

    申请号：US3644015D

    申请日：1970-06-18

    申请人： HEWLETT PACKARD CO

    发明人： HEARA JOHN R

    IPC分类号： G02F1/11 ,  G02F1/24

    CPC分类号： G02F1/113

    摘要： An acousto-optic band reject light filter is disclosed. The light filter includes an optically anisotropic medium, such as a birefringent crystal, in which an acoustic wave is excited at a certain selected radiofrequency corresponding to a selected optical frequency to be rejected. The crystal is disposed to receive an incident light beam containing the selected optical frequency to be rejected. The light beam is collinearly diffracted on the acoustic wave within the optically anisotropic medium to diffract light of a first polarization and of the selected optical frequency related to the acoustic frequency into light of a second polarization. The diffracted light beam is then passed through a polarization analyzer to reject from the diffracted light beam light of the second polarization while retaining in the diffracted light beam light of the first polarization. The selectable frequency in the light beam which is to be rejected can be tuned over a wide band by tuning the frequency of the acoustic wave within the crystal.

    摘要翻译： 公开了一种声光波段抑制光滤波器。 光滤波器包括诸如双折射晶体的光学各向异性介质，其中声波在对应于要被拒绝的所选择的光频率的某个选定的射频频率下被激发。 晶体被设置成接收包含被拒绝的所选择的光频率的入射光束。 光束在光学各向异性介质中的声波上共线衍射，以将第一偏振光和与声频相关的选定光频率衍射为第二偏振光。 然后，衍射光束通过偏振分析器，从而抑制第二极化的衍射光束，同时保持第一偏振的衍射光束。 通过调谐晶体内的声波的频率，可以在宽带上调整要被拒绝的光束中的可选频率。

    Method and apparatus for controlling an optical gate utilizing optically induced birefringence
    62.
    发明授权
    Method and apparatus for controlling an optical gate utilizing optically induced birefringence 失效
    用于控制光栅的光学诱导光纤的方法和装置

    公开(公告)号：US3637287A

    公开(公告)日：1972-01-25

    申请号：US3637287D

    申请日：1970-08-19

    申请人： BELL TELEPHONE LABOR INC

    发明人： HANSEN JOHN WILFRED

    IPC分类号： G02F1/35 ,  G02F1/24

    CPC分类号： G02F1/3511

    摘要： The opening time or framing time of an optical gate, which comprises a pair of crossed polarizers and disposed therebetween a medium in which birefringence can be optically induced, is reduced by applying sequentially to the medium first and second high intensity, fast rise time, orthogonally polarized optical control pulses delayed with respect to one another by a time Delta t corresponding to the desired opening time of the gate. The first pulse opens the gate, i.e., induces birefringence in the gate medium and thereby permits an optical signal to be gated to pass through both polarizers. At a time Delta t later the second pulse closes the gate, i.e., cancels the birefringence induced by the first pulse thereby causing the optical signal to be absorbed by one of the polarizers.

    摘要翻译： 光栅的打开时间或成帧时间，其包括一对交叉偏振器并且设置在其间可以光学诱导双折射的介质，通过顺序地施加到第一和第二高强度，快速上升时间，正交地 偏振光学控制脉冲相对于彼此延迟与门的期望打开时间相对应的时间DELTA t。 第一脉冲打开栅极，即在栅极介质中引起双折射，从而允许光信号通过两个偏振器。 在一段时间DELTA t之后，第二脉冲关闭门，即消除由第一脉冲引起的双折射，从而使光信号被其中一个偏振器吸收。

    Method and apparatus for control of light transmission through an anisotropic medium
    63.
    发明授权
    Method and apparatus for control of light transmission through an anisotropic medium 失效
    通过各向异性介质控制光传输的方法和装置

    公开(公告)号：US3632193A

    公开(公告)日：1972-01-04

    申请号：US3632193D

    申请日：1970-06-17

    申请人： HEWLETT PACKARD CO

    发明人： KUSTERS JOHN A

    IPC分类号： G02F1/11 ,  G02F1/24

    CPC分类号： G02F1/116

    摘要： An electronically tunable acousto-optic filter is disclosed of the type wherein light of a first polarization is diffracted on an acoustical wave traveling collinearly of the light in an anisotropic birefringent medium to shift the polarization of the light from a first polarization to a second polarization. The intensity of the acoustic wave in the birefringent medium is varied to vary the ratio of the intensity of the light diffracted from the first polarization into the second polarization. The band pass of the acousto-optic filter is electronically tuned by varying the frequency of the acoustic wave in the birefringent medium. The acousto-optic device may be employed as an attenuator, chopper, or modulator for light.

    摘要翻译： 公开了一种电子可调谐声光滤波器，其中第一偏振光在与各向异性双折射介质中的光线共线行进的声波上衍射，以将光从第一偏振转移到第二偏振。 改变双折射介质中的声波的强度以改变从第一偏振衍射的光的强度与第二偏振的比率。 通过改变双折射介质中的声波的频率来电声调节声光滤波器的带通。 声光器件可以用作衰减器，斩波器或用于光的调制器。

    Optical circulator and energy converter
    64.
    发明授权
    Optical circulator and energy converter 失效
    光电循环器和能量转换器

    公开(公告)号：US3625590A

    公开(公告)日：1971-12-07

    申请号：US3625590D

    申请日：1969-11-05

    申请人： IBM

    发明人： HABEGGER MILLARD A

    IPC分类号： H01S3/083 ,  G02B27/28 ,  G02F1/00 ,  G02F1/31 ,  G02F1/37 ,  H01S3/11 ,  G02F1/24

    CPC分类号： G02F1/31 ,  G02B27/283 ,  G02F1/00 ,  G02F1/37

    摘要： Optical circulator or storage ring apparatus employing a nonreciprocal optical device and reflecting means to store optical energy. The device has the property that if a light beam is projected to it in one direction it is totally reflected and if projected to it in a second direction it is totally transmitted. By employing this device, optical energy may be coupled into and out of the circulator without optical loss. By exercising control over the polarization of the energy the circulator converts it so that it may be supplied in either continuous wave or pulse form. If a nonlinear crystal is located in the circulator in the path of the energy the apparatus acts to convert from a fundamental wavelength to a predetermined harmonic of that wavelength.