-
公开(公告)号：US4221464A
公开(公告)日：1980-09-09
申请号：US952170
申请日：1978-10-17
IPC分类号： G02B5/30
CPC分类号： G02B5/3066 , G02B5/3058
摘要： There is disclosed a polarizer particularly suited for use in the infrared wavelengths which comprises a wire grid polarizer in optically cascaded relationship with a Brewster's Angle Polarizer. Not only do the extinction ratios of the optically cascaded polarizers multiply to provide higher extinction ratios at these wavelengths, but also the reflective mirror properties of the wire grid polarizers can be used in combination with the known optical properties of Brewster Polarizers to provide a combined device which optimizes both the extinction ratios achieved and the balance between the reflection and recombination problem of the system on the one hand and the offset or beam walking problem on the other hand in a manner to provide optical characteristics which are not achievable from any simple combinations of either type of polarizer alone.
摘要翻译： 公开了一种特别适用于红外波长的偏振器，其包括与布鲁斯特角度偏振器在光学级联关系中的线栅偏振器。 光学级联偏振器的消光比不仅在这些波长处倍增以提供较高的消光比，而且还可以将布线极化器的反射镜特性与布鲁斯特偏振器的已知光学特性结合使用以提供组合装置 其优化了所获得的消光比和系统的反射和复合问题之间的平衡以及偏移或光束行走问题，另一方面提供了通过任何简单组合不能实现的光学特性的方式 任何一种类型的偏振器单独。
-
公开(公告)号：US5151814A
公开(公告)日：1992-09-29
申请号：US673175
申请日：1991-03-18
IPC分类号： G02F1/1343 , G02F1/1347 , G02F1/139 , G02F1/29
CPC分类号： G02B27/0087 , G02F1/292 , G02F1/134336 , G02F1/1347 , G02F1/1393 , G02F2203/01 , G02F2203/02 , G02F2203/24
摘要： An optical beam scanner incorporating an array of beam deflection elements commonly controlled to steer an optical beam impingent on the array is described. The beam steering elements are arranged in the array as individually controlled elements and the deflection of the beam is accomplished by setting the phase tilt and the phase offset of each element according to a calculation which removes modulo 2.pi. phase shift from the required position relative to a flat plane. Thus, the array elements can be thin and need only supply about 2 radians of phase shift. These elements may be incorporated in a planar array using beam deflection elements such as liquid crystal beam deflectors by choosing a drive scheme representing either a blazed array or a flat piston array. Operation may be designed for a large range of light wavelengths and the system may efficiently accommodate a combination of the blazed and flat piston techniques to obtain beam deflection characteristics otherwise unavailable by the exclusive use of each individual technique. By use of the liquid crystal phased array approach, rapid, high accuracy, large area beam deflection is possible without the necessity of any moving parts and with low power drive requirements. Phased arrays of the type described above may be arranged in successive parallel planes with a common beam axis to provide two-dimensional beam deflection.
摘要翻译： 描述了一种光束扫描器，其包括通常被控制以引导照射在阵列上的光束的光束偏转元件阵列。 光束操纵元件作为独立控制的元件布置在阵列中，并且通过根据计算来设置每个元件的相位倾斜和相位偏移来实现光束的偏转，该计算从相对于所需位置移除模2π相移 平面飞机 因此，阵列元件可以是薄的，并且仅需要提供约2弧度的相移。 通过选择表示闪耀阵列或平坦活塞阵列的驱动方案，这些元件可以使用诸如液晶束偏转器的光束偏转元件并入平面阵列中。 操作可以设计用于大范围的光波长，并且系统可以有效地适应闪耀和平坦活塞技术的组合以获得否则不能通过各自独占技术的独占使用而获得光束偏转特性。 通过使用液晶相位阵列方法，可以快速，高精度，大面积的光束偏转，而不需要任何移动部件和低功率驱动要求。 上述类型的相控阵列可以布置在具有共同波束轴的连续平行平面中，以提供二维波束偏转。
-
公开(公告)号：US3988671A
公开(公告)日：1976-10-26
申请号：US558761
申请日：1975-03-17
申请人： Melvin E. Pedinoff
发明人： Melvin E. Pedinoff
摘要： There is disclosed a method and apparatus for radio frequency signal spectrum analysis wherein an acoustic wave having frequency components representative of those which exist in the radio frequency signal to be analyzed is derived from the signal and transmitted through an optically anisotropic crystal simultaneously and colinearly with a beam of polarized wide-band white light. The acoustic wave produces changes in the index of refraction of the crystalline material which result in diffraction of the plane of polarization of those frequency components of the light beam which bear a unique predetermined relationship to the frequency components present in the acoustic wave. The output of the crystal is then passed through a polarization analyzer to transmit only those frequency components which have been polarization diffracted. The light output of the polarization analyzer is applied to a grating or other means for dispersing the light output so that its various frequency components are deflected by varying amounts indicative of the frequency. The rays deflected from the grating or other dispersing means are then displayed in any suitable manner to provide a visually readable spectrum analysis of the original signal.
摘要翻译： 公开了一种用于射频信号频谱分析的方法和装置，其中具有表示要分析的射频信号中存在的频率分量的频率分量的声波从该信号中导出并且通过光学各向异性晶体同时并且与 偏光宽带白光束。 声波产生结晶材料的折射率的变化，其导致光束的那些频率分量的偏振平面的衍射，其与声波中存在的频率分量具有唯一的预定关系。 然后将晶体的输出通过偏振分析器，以仅透射已经被偏振衍射的那些频率分量。 偏振分析器的光输出被施加到光栅或其他用于分散光输出的装置，使得其各种频率分量通过指示频率的变化量偏转。 然后以任何合适的方式显示从光栅或其他分散装置偏转的光线，以提供原始信号的视觉可读光谱分析。
-
公开(公告)号：US20070171513A1
公开(公告)日：2007-07-26
申请号：US11527358
申请日：2006-09-26
申请人： Christopher N. Pannell , Thomas Stenger , Jonathan David Ward , Melvin E. Pedinoff , Ramesh K. Shori
发明人： Christopher N. Pannell , Thomas Stenger , Jonathan David Ward , Melvin E. Pedinoff , Ramesh K. Shori
IPC分类号： G02F1/33
CPC分类号： H01S3/117 , G02F1/11 , G02F2202/105 , H01S3/0612
摘要： An acousto-optic modulator includes a (100), (010) or (001) single crystal silicon acousto-optic interaction medium, and at least one transducer for emitting an acoustic wave attached to the single crystal. The transducer has a first electrode layer disposed on one side and a second electrode layer disposed on its other side. The transducer is aligned to the single crystal so that the direction of acoustic propagation in the silicon crystal is substantially along the (100), (010) or (001) direction. A q-switched laser includes a modulator according to the invention.
摘要翻译： 声光调制器包括（100），（010）或（001）单晶硅声光交互介质，以及至少一个用于发射附着于单晶的声波的换能器。 换能器具有设置在一侧的第一电极层和设置在另一侧的第二电极层。 传感器与单晶对准，使得硅晶体中的声传播方向基本上沿着（100），（010）或（001）方向。 q切换激光器包括根据本发明的调制器。
-
公开(公告)号：US07385749B2
公开(公告)日：2008-06-10
申请号：US11527358
申请日：2006-09-26
申请人： Christopher N. Pannell , Thomas Stenger , Jonathan David Ward , Melvin E. Pedinoff , Ramesh K. Shori
发明人： Christopher N. Pannell , Thomas Stenger , Jonathan David Ward , Melvin E. Pedinoff , Ramesh K. Shori
CPC分类号： H01S3/117 , G02F1/11 , G02F2202/105 , H01S3/0612
摘要： An acousto-optic modulator includes a (100), (010) or (001) single crystal silicon acousto-optic interaction medium, and at least one transducer for emitting an acoustic wave attached to the single crystal. The transducer has a first electrode layer disposed on one side and a second electrode layer disposed on its other side. The transducer is aligned to the single crystal so that the direction of acoustic propagation in the silicon crystal is substantially along the (100), (010) or (001) direction. A q-switched laser includes a modulator according to the invention.
摘要翻译： 声光调制器包括（100），（010）或（001）单晶硅声光交互介质，以及至少一个用于发射附着于单晶的声波的换能器。 换能器具有设置在一侧的第一电极层和设置在另一侧的第二电极层。 传感器与单晶对准，使得硅晶体中的声传播方向基本上沿着（100），（010）或（001）方向。 q切换激光器包括根据本发明的调制器。
-
公开(公告)号：US06819849B1
公开(公告)日：2004-11-16
申请号：US07228793
申请日：1988-07-29
IPC分类号： G02B514
CPC分类号： G02B6/0288
摘要： Methods and apparatus are disclosed for an intrusion detection system for secure fiber optic communication systems. A guard signal is transmitted over the optical fiber communication link and both the modal power and modal phase delay of this signal are monitored. Intrusions into the link for the purpose of intercepting information being transmitted, cause changes in the modal phase delay and power of the guard signal. These changes, when detected by the monitoring system, indicate the presence of an intruder. A fiber profile which is optimal for both transmission and intrusion detection purposes is described.
摘要翻译： 公开了用于安全光纤通信系统的入侵检测系统的方法和装置。 通过光纤通信链路发送保护信号，并监视该信号的模式功率和模态相位延迟。 为了拦截正在发送的信息的目的而引入到链路中，导致保护信号的模态相位延迟和功率的改变。 当监控系统检测到这些更改时，会显示入侵者的存在。 描述了对于传输和入侵检测目的都是最佳的光纤轮廓。
-
公开(公告)号：US4937539A
公开(公告)日：1990-06-26
申请号：US420661
申请日：1989-10-10
IPC分类号： G02F1/1343 , G02F1/1347 , G02F1/139 , G02F1/29
CPC分类号： G02B27/0087 , G02F1/292 , G02F1/134336 , G02F1/1347 , G02F1/1393 , G02F2203/01 , G02F2203/02 , G02F2203/24
摘要： An optical beam scanner incorporating an array of beam deflection elements commonly controlled to steer an optical beam impingent on the array is described. The beam steering elements are arranged in the array as individually controlled elements and the deflection of the beam is accomplished by setting the phase tilt and the phase offset of each element according to a calculation which removes modulo 2.pi. phase shift from the required position relative to a flat plane. Thus, the array elements can be thin and need only supply about 2 radians of phase shift. These elements may be incorporated in a planar array using beam deflection elements such as liquid crystal beam deflectors by choosing a drive scheme representing either a blazed array or a flat piston array. Operation may be designed for a large range of light wavelengths and the system may efficiently accommodate a combination of the blazed and flat piston techniques to obtain beam deflection characteristics otherwise unavailable by the exclusive use of each individual technique. By use of the liquid crystal phased array approach, rapid, high accuracy, large area beam deflection is possible without the necessity of any moving parts and with low power drive requirements. Phased arrays of the type described above may be arranged in successive parallel planes with a common beam axis to provide two-dimensional beam deflection.
-
公开(公告)号：US4016563A
公开(公告)日：1977-04-05
申请号：US581398
申请日：1975-05-27
申请人： Melvin E. Pedinoff
发明人： Melvin E. Pedinoff
摘要： There is disclosed a pulse processing method and apparatus for compressing or changing the time scale of signal information represented by the modulation of a pulse of carrier energy which method and apparatus utilizes a crystal through which both a pulse of radio frequency acoustic energy and a pulse of polarized optical energy are simultaneously and colinearly transmitted to scatter energy in the optical pulse from one polarization state into the orthogonal polarization state. The crystal output is thus comprised of two optical pulses. One is the pulse having the original state of polarization and the other is the pulse resulting from the energy scattered to the orthogonal polarization state. The optical energy of rotated polarization is modulated in a fashion reproducing the modulation of the ultrasonic wave by which it is scattered. Furthermore, a short optical pulse can pass through the ultrasonic wave in a time short compared to the duration or length of the ultrasonic wave in the crystalline device. In so doing it reads the modulation of the acoustic pulse and transfers it to a time compressed pulse scale on the scattered optical output pulse. It is shown that the compression ratio is equal to the ratio of the velocity of light divided by the product of the velocity of sound in the crystal times the absolute value of birefringence of the crystal. If both the optical and acoustic pulses are passed through the crystal colinearly and in the same direction, the device takes a time function represented by the acoustic pulse, reverses it in time and compresses it by the ratio of light velocity to sound velocity thus producing a compressed inverse function. If the acoustic pulse and the light pulses are transmitted through the crystal colinearly but in opposite directions, the device takes a time function and without reversing it, compresses it in substantially the same ratio. The device may be applied, for example as a means of improving the signal-to-noise ratio, detection ratio and range resolution in radar systems or the like.
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.016 秒)
