公开(公告)号：US5079642A

公开(公告)日：1992-01-07

申请号：US628851

申请日：1990-12-13

Applicant: Doug W. Dreisewerd ,  John A. Haack ,  Thomas F. Rigney

Inventor： Doug W. Dreisewerd ,  John A. Haack ,  Thomas F. Rigney

IPC: G02F1/03

CPC classification number: G02F1/0305 ,  G02F2201/505

Abstract: There is provided by this invention an electro-optic modulator for damping acoustical energy produced by an electro-optic crystal. The modulator couples acoustic energy from the electro-optic crystal to an acoustic coupler due to the matching acoustic impedances of the coupler and the crystal. The coupler transmits the acoustic wave to the acoustic damper which dampens the acoustic energy. The coupler linearly decreases in height in a direction away from the crystal so that the acoustic wave is reflected through more than one damper prior to returning to the crystal, thus further decreasing acoustical energy. Another feature of this invention is the geometrical design of the electro-optic crystal which has two of its faces, which are not attached to a coupler, positioned not to be perpendicular with a face attached to a coupler. This design of the crystal allows for all acoustic waves, even if directed toward a face which does not have an attached coupler, to be reflected toward a face having an attached coupler so that they can be coupled from the cavity and damped. A further feature of this invention is the use of material from the damper in the bonding material between the coupler and the damper so that a gradient interface is formed so that more efficient transmission to and from the damper is obtained.

Abstract translation: 本发明提供一种用于阻尼由电光晶体产生的声能的电光调制器。 由于耦合器和晶体的匹配声阻抗，调制器将来自电光晶体的声能耦合到声耦合器。 耦合器将声波传播到抑制声能的声阻尼器。 耦合器在远离晶体的方向上的高度线性地减小，使得声波在返回晶体之前通过多于一个的阻尼器反射，从而进一步降低声能。 本发明的另一个特征是电光晶体的几何设计，其具有两个未被连接到耦合器的两个面，其不被定位成与连接到耦合器的面垂直。 晶体的这种设计允许所有的声波，即使被引导到没有连接的耦合器的面，被朝向具有连接的耦合器的面反射，使得它们可以从空腔耦合并被阻尼。 本发明的另一个特征是在耦合器和阻尼器之间的接合材料中使用来自阻尼器的材料，使得形成梯度界面，从而获得到阻尼器的更有效的传输。