公开(公告)号：US3663088A

公开(公告)日：1972-05-16

申请号：US3663088D

申请日：1970-08-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： MALDONADO JUAN RAMON ,  MEITZLER ALLEN HENRY

IPC: G02F1/055 ,  G02F1/31 ,  G02F1/20

CPC classification number: G02F1/055 ,  G02F1/31

Abstract: A controllable optical phase retardation device includes a fine grain electrooptic ceramic plate, such as lanthanum doped lead zirconate-lead titanate. The plate is subjected to a constant and uniform strain with a tension axis in the plane of the plate, while a beam of optical radiation traverses the thickness of the plate. By applying voltages to a pair of transparent electrode layers located on opposed major surfaces of the plate, the degree of birefringence is controlled, that is, the relative optical phase retardation of the extraordinary and ordinary rays in the optical beam propagating through the plate is controllably varied by the electric fields perpendicular to the surfaces of the plate. This control over the phase retardation can be converted into optical intensity modulation or optical beam deflection by means of a conventional polarizer together with an optical analyzer or a doubly refracting prism.

Abstract translation: 可控光学相位差装置包括细晶电光陶瓷板，例如掺镧铅锆酸铅 - 钛酸铅。 板在板的平面中受到张力轴的恒定均匀应变，而光束穿过板的厚度。 通过对位于板的相对主表面上的一对透明电极层施加电压，控制双折射度，即可控制地传播的光束中的异常和普通光线的相对光相位延迟 由垂直于板表面的电场而变化。 这种对相位延迟的控制可以通过常规偏振器与光学分析器或双折射棱镜一起转换成光强度调制或光束偏转。

公开(公告)号：US3659270A

公开(公告)日：1972-04-25

申请号：US3659270D

申请日：1970-01-05

Applicant: BELL TELEPHONE LABOR INC

Inventor： MALDONADO JUAN RAMON ,  MEITZLER ALLEN HENRY

IPC: G11C11/42 ,  G02F1/055 ,  G11C5/04 ,  G11C11/22

CPC classification number: G02F1/055

Abstract: A fine grain, ferroelectric ceramic parallel plate, such as lanthanum doped, lead zirconate-lead titanate, is subjected to a constant and uniform stress along a first direction in the plane of the plate. By means of a photoconductive layer and a pair of transparent electrode layers, the ferroelectric plate under stress can be subjected to selective WRITE-IN of a pattern of information using an optical WRITE-IN beam of light, as well as a selective ERASE of such information, all under the control of electric fields only in the normal direction to the plane of the ferroelectric plate produced by D.C. voltages applied to the electrode layers.

Abstract translation: 在平板的平面中，沿着第一方向的细晶粒，铁电陶瓷平行板，例如掺杂的镧，锆酸铅铅钛酸盐受到恒定均匀的应力。 通过光电导层和一对透明电极层，应力下的铁电板可以使用光写入光束光束进行信息图案的选择性写入，以及这样的选择性擦除 信息，全部在电场的控制下，仅在垂直方向上施加到电极层的直流电压产生的铁电板的平面。