公开(公告)号：US5917568A

公开(公告)日：1999-06-29

申请号：US272726

申请日：1994-07-08

申请人： Kristina Mary Johnson ,  Ido Bar-Tana ,  Douglas John McKnight

发明人： Kristina Mary Johnson ,  Ido Bar-Tana ,  Douglas John McKnight

IPC分类号： G02F1/135 ,  H04N5/225 ,  H04N5/238 ,  G02F1/133 ,  G02F1/1335

CPC分类号： H04N5/2254 ,  G02F1/135 ,  H04N5/238

摘要： An optically addressed, optical relaying device placed between crossed polarizers utilizes an array of pixels made up of photodetectors, circuitry, and modulating pads, and an analog liquid crystal to modulate the intensity of an optical signal on a pixel by pixel basis. The photodetector generates a current proportional to the light detected. Once the current exceeds a certain level, the circuitry stores a charge on the modulating pad proportional to the photo-induced current. This stored charge rotates the molecules of the liquid crystal thereby rotating the polarization of the light signal. The output polarizer then attenuates the light beam according to the change in polarization.

摘要翻译： 放置在交叉偏振器之间的光学寻址的光学中继装置利用由光电检测器，电路和调制焊盘构成的像素阵列以及模拟液晶，以逐个像素地调制光信号的强度。 光电检测器产生与检测到的光成比例的电流。 一旦电流超过了一定的电平，电路就会将调制电压的电荷与光电流成比例。 该储存的电荷旋转液晶的分子，从而旋转光信号的偏振。 输出偏振器随着偏振变化衰减光束。