-
公开(公告)号：US20190079321A1
公开(公告)日：2019-03-14
申请号：US16124948
申请日：2018-09-07
CPC分类号： G02F1/0136 , G02F1/0147 , G02F1/0551 , G02F1/0555 , G02F2202/101 , G02F2202/102 , G02F2202/30
摘要： The optical response of a metasurface is controlled by actuating it via an electrical or magnetic field, temperature control, optical pumping or electromechanical actuation. The metasurface will therefore control the polarization of the incident light. The metasurface comprises an array of patch antennas. The patch antennas are in the form of asymmetrical elements, including rotated rods, cross-shapes, V-shapes, and L-shapes.
-
公开(公告)号：US20030067667A1
公开(公告)日：2003-04-10
申请号：US10167121
申请日：2002-06-10
发明人： Feiling Wang , Xiao-Li Li , Yingyin Zou , Wei Hu
IPC分类号： G02F001/00 , G02B006/00
CPC分类号： G02F1/0555 , G02F1/0136
摘要： A polarization mode dispersion detector (306) measures PMD impairment through the cross-correlation of optical pulses of the light wave available from a tapped signal (40) coupled or tapped from a coupler (37). The detector (500) includes a first variable phase retarder plate (502) having a first controllable phase retardation exerted between a pair of orthogonal polarization components of the light wave in a fast axis and a slow axis of the first variable phase retarder plate (502). A second variable phase retarder plate (504) is oriented with polarization eigenstates at a preferably 45 degree angle with respect to those eigenstates of the first variable phase retarder plate (502). The second variable phase retarder plate (504) has a second controllable phase retardation exerted between a pair of orthogonal polarization components of the light wave in a fast axis and a slow axis of the second variable phase retarder plate (502). A linear polarizer (506) is optically coupled to the second variable phase retarder plate (504) having its polarization direction parallel to the first variable phase retarder (502). The low-speed photodetector (530) is optically coupled with the polarizer (506) for sensing the intensity of the light transmitted through the polarizer (506). A controller (540) varies the first controllable phase retardation of the first variable phase retarder (502) and varies the second controllable phase retardation of the second variable phase retarder (504) for measuring the intensity oscillation as an indication of PMD impairment or distortion. This indication of PMD impairment is the novel electrical control signal (42) from which the PT compensating signal (442) and the VDGD compensating signal (462) is derived by the controller (540).
摘要翻译： 偏振模色散检测器（306）通过从耦合器（37）耦合或抽头的抽头信号（40）可获得的光波的光脉冲的互相关来测量PMD损伤。 检测器（500）包括第一可变相位延迟板（502），该第一可变相位延迟板（502）具有施加在快轴上的光波的一对正交偏振分量与第一可变相位延迟板（502）的慢轴之间的第一可控相位延迟 ）。 相对于第一可变相位延迟板（502）的这些本征态，第二可变相位延迟板（504）被定向为具有偏振本征态，优选地为45度角。 第二可变相位延迟板（504）具有施加在快轴中的光波的一对正交偏振分量与第二可变相位延迟板（502）的慢轴之间的第二可控相位延迟。 线性偏振器（506）光学耦合到其偏振方向平行于第一可变相位延迟器（502）的第二可变相位延迟板（504）。 低速光电检测器（530）与偏振器（506）光学耦合，用于感测透射通过偏振器（506）的光的强度。 控制器（540）改变第一可变相位延迟器（502）的第一可控相位延迟，并且改变用于测量强度振荡的第二可变相位延迟器（504）的第二可控相位延迟，作为PMD损伤或失真的指示。 PMD损伤的这种指示是由控制器（540）从其导出PT补偿信号（442）和VDGD补偿信号（462）的新颖的电控信号（42）。
-
公开(公告)号：US5481398A
公开(公告)日：1996-01-02
申请号：US181573
申请日：1994-01-13
申请人： David J. Schoon
发明人： David J. Schoon
CPC分类号： B41J2/465 , G02F1/055 , G02F1/0551 , G02F1/0555
摘要： An electro-optic imager, used for exposing photosensitive media, wherein a modulator, e.g. an array of PLZT light valves, is used to modulate one or more light beams. Temperature control is applied to the modulator to reduce or eliminate variations in response characteristics which would otherwise change the color balance of the final print from the desired color balance.
摘要翻译： 一种用于曝光光敏介质的电光成象仪，其中调制器，例如， PLZT光阀阵列用于调制一个或多个光束。 温度控制被应用于调制器以减少或消除响应特性的变化，否则将改变最终印刷品与预期色彩平衡的色彩平衡。
-
公开(公告)号：US5149953A
公开(公告)日：1992-09-22
申请号：US632812
申请日：1990-12-24
申请人： James C. Erwin
发明人： James C. Erwin
CPC分类号： G02F1/0123 , G02F1/0555
摘要： Compensation for space charge build-up in an electro-optic modulator device is realized by recurrently recalibrating the device. During each recalibration interval, light transmitted through the device is intercepted and converted to an electric signal which is compared to a test signal of a magnitude corresponding to light of an intensity that would be transmitted through the device in the absence of space charge. The difference between the respective magnitudes of the test signal and the electric signal serves as a bias to supplement the normal modulating drive signal until the time of next recalibration. Recurrently, but at a rate lower than the recalibration rate, the device is short circuited, while flooded with light, to eliminate space charge build-up.
摘要翻译： 电光调制器装置中空间电荷积聚的补偿是通过对装置进行重新校准来实现的。 在每个重新校准间隔期间，透过装置的光被截取并转换成电信号，该电信号与对应于在不存在空间电荷的情况下通过装置传输的强度的光的大小的测试信号进行比较。 测试信号和电信号的各自的大小之间的差异用作补充正常调制驱动信号直到下次重新校准的时间的偏差。 经常性地，以比重新校正速率低的速度，器件短路，同时充满光，消除空间电荷积聚。
-
公开(公告)号：US20040047533A1
公开(公告)日：2004-03-11
申请号：US10451669
申请日：2003-06-25
发明人： Jean-Pierre Huignard
IPC分类号： G02B005/30 , G02B006/00
CPC分类号： G02F1/0555 , G02F1/0136 , G02F1/134309
摘要： The device of the invention essentially comprises a plate (6) of electrooptic material, for example PLZT, on which four electrodes (7 to 10) are printed. The electric field produced by applying voltages (V1 to V4) to these electrodes creates a rotating-axis phase plate.
摘要翻译： 本发明的装置基本上包括电光材料板（6），例如PLZT，其上印有四个电极（7至10）。 通过向这些电极施加电压（V1〜V4）而产生的电场产生旋转轴相位板。
-
6.发明授权
公开(公告)号：US5450230A
公开(公告)日：1995-09-12
申请号：US962712
申请日：1992-10-19
CPC分类号： G02F1/0555 , B41J2/465
摘要： The present invention relates to a light shutter array which has shutter elements made of an electro-optical material. The quantity of light transmitted by each shutter element in the array is measured, and a limit is set relative to the smallest measured value such that the transmitted light quantity distribution of the light shutter array would be regarded substantially even if all shutter elements transmitted light within the limit. To achieve such a substantially even distribution, shutter elements which transmit light over the limit are subjected to trimming. Since trimmed regions on a shutter element do not transmit light, the quantity of light transmitted through a trimmed shutter element is lowered in proportion to the area of the trimmed region. Alternatively, individual electrodes and/or portions of a common electrode corresponding to the shutter elements which transmit light over the limit are trimmed. As a result, electric fields generated in the shutter elements are weakened, and the polarizing effects of the shutter elements are weakened. Consequently, the quantity of light transmitted through those shutter elements is lowered.
摘要翻译： 本发明涉及具有由电光材料制成的快门元件的光闸阵列。 测量由阵列中的每个快门元件透射的光量，并且相对于最小测量值设定极限，使得即使所有快门元件在其中透射光，也将基本上认为光快门阵列的透射光量分布 极限。 为了实现这种基本均匀的分布，将在极限上透射光的快门元件进行修整。 由于快门元件上的修剪区域不透光，所以通过修剪的快门元件传输的光量与修剪区域的面积成正比地降低。 或者，修剪对应于在极限上透射光的快门元件的公共电极的单独电极和/或部分。 结果，在快门元件中产生的电场被削弱，并且快门元件的偏振效果变弱。 因此，透过这些快门元件的光量降低。
-
公开(公告)号：US5325228A
公开(公告)日：1994-06-28
申请号：US679758
申请日：1991-04-03
申请人： Ken Matsubara , Kouichi Shingaki , Tsukasa Yagi , Hirohisa Kitano , Itaru Saito , Kenichi Wada , Atsushi Fujita
发明人： Ken Matsubara , Kouichi Shingaki , Tsukasa Yagi , Hirohisa Kitano , Itaru Saito , Kenichi Wada , Atsushi Fujita
CPC分类号： G02F1/0555 , G09G3/00
摘要： An optical shutter device for use, e.g., in an optical printer includes a plurality of electrooptic chips each having a plurality of very small segments for optical modulation. The optical shutter device has a voltage adjusting circuit which individually supplies the driving voltage to the chips depending on the light transmitting characteristics intrinsic to the chips. Thus, even when the chips have different light transmitting characteristics, the image produced by the chips will have a uniform intensity.
摘要翻译： 例如在光学打印机中使用的光学快门装置包括多个电光芯片，每个电光芯片具有多个用于光学调制的非常小的部分。 光闸装置具有电压调整电路，该电压调节电路根据芯片固有的透光特性向芯片单独提供驱动电压。 因此，即使芯片具有不同的透光特性，由芯片产生的图像也将具有均匀的强度。
-
公开(公告)号：US5155618A
公开(公告)日：1992-10-13
申请号：US801423
申请日：1991-12-02
申请人： Ken Matsubara , Hirohisa Kitano , Koji Wakamiya
发明人： Ken Matsubara , Hirohisa Kitano , Koji Wakamiya
CPC分类号： G06K15/1252 , G02F1/0555 , G02F1/0327
摘要： A light signal generating device having a plurality of electro-optical light shutter elements which are turned on and off individually in accordance with image data. The light shutter elements are connected to individual electrodes each, and also connected to a common electrode. The common electrode and a power source for supplying a voltage to the individual electrodes are connected with a grounding line. Discharge lines are disposed between the common electrode and the grounding line, and switching elements are disposed on the discharge lines so as to prevent discharge currents, which are drawn from the light shutter elements at falls of the driving voltage, from flowing into the grounding line.
摘要翻译： 一种光信号发生装置，具有根据图像数据单独打开和关闭的多个电光快门元件。 光快门元件各自连接到各个电极，并且还连接到公共电极。 公共电极和用于向各个电极提供电压的电源与接地线连接。 放电线设置在公共电极和接地线之间，开关元件设置在放电线上，以防止在驱动电压下降时从光闸元件汲取的放电电流流入接地线 。
-
公开(公告)号：US5064277A
公开(公告)日：1991-11-12
申请号：US646116
申请日：1991-01-28
IPC分类号： G02F1/055
CPC分类号： G02F1/0555
摘要： An electro-optic light modulator of the type including a body of an electro-optic material having opposed surfaces and a pair of planar conductive electrodes on at least one of the surfaces of the body. Polarity-reversing drive circuitry applies a voltage across the electrodes, the polarity of the voltage being reversed at a frequency of about 1 Hz or less with polarity reversal occurring either when the light modulator is turned off or when there is an insignificiant voltage drop across the electrodes. This low frequency of the reversal of the polarity of the voltage substantially eliminates drift of the voltage-transmissivity of the modulator, lowers leakage, and reduces damage to the electrodes during a given period of time of operation.
摘要翻译： 一种电光调制器，其类型包括具有相对表面的电光材料的主体和在主体的至少一个表面上的一对平面导电电极。 极性反转驱动电路在电极两端施加电压，电压的极性以约1Hz或更小的频率反转，极性反转发生时，或者当光调制器关闭时，或者当整个电压调节器处于不稳定的电压降时 电极。 电压极性反转的这个低频率基本上消除了调制器的电压 - 透射率的漂移，降低了泄漏，并且在给定的操作时间内减少了对电极的损坏。
-
公开(公告)号：US4974945A
公开(公告)日：1990-12-04
申请号：US254456
申请日：1988-10-06
申请人： Akira Kumada
发明人： Akira Kumada
CPC分类号： G02F1/0555
摘要： In an optical modulator, an electro-optic crystal is used. A pyroelectric body is connected to the electro-optic crystal through electrical interconnections. A polarizer and an analyzer are respectively arranged in spaced relation to an input side and an output side of the electro-optic crystal. The pyroelectric body receives heat generated by any of light, laser light, an electric resistor or heat generated from absorption of an electromagnetic wave or a radioactive ray. When heat energy is applied to the pyroelectric body, charges are produced in the pyroelectric body, so that a voltage based on the charges is applied to the electro-optic crystal. In this way, a plane of polarization in the electro-optic crystal is rotated so that the amount of light passing through the analyzer is varied in accordance with an applied heat energy.
摘要翻译： 在光学调制器中，使用电光晶体。 热电体通过电气互连连接到电光晶体。 偏振器和分析器分别以与电光晶体的输入侧和输出侧成间隔的关系布置。 热电体接受由光，激光，电阻或由电磁波或放射线吸收产生的热量中的任何一种产生的热量。 当热能被施加到热电体时，在热电体中产生电荷，使得基于电荷的电压被施加到电光晶体。 以这种方式，旋转电光晶体中的偏振平面，使得通过分析器的光量根据施加的热能而变化。
-
-
-
-
-
-
-
-
-
搜索结果
39 条记录 (耗时 0.014 秒)
