公开(公告)号：US4249814A

公开(公告)日：1981-02-10

申请号：US80382

申请日：1979-10-01

申请人： John R. Hull ,  Malvern K. Iles

发明人： John R. Hull ,  Malvern K. Iles

IPC分类号： G03B9/08 ,  G03B19/12

CPC分类号： G03B9/08 ,  G03B19/12

摘要： An improved camera shutter system which employs the principles of frustrated total internal reflection as a means for controlling transmission of light to a camera film. The shutter is comprised of at least two prism elements, one facing the other and one movable with respect to the other, to allow a common adjoining surface to move from a closed position to an open position wherein the surfaces have a space or gap therebetween. When the surfaces are open having a space or gap in between, the gap is at least just slightly larger than a wave length of light, with the result being that light is reflected rather than transmitted from one prism to the other. When the gap is closed, light is transmitted directly through one prism into the other and from there to a film positioned behind the second prism.

摘要翻译： 一种改进的相机快门系统，其采用沮丧的全内反射的原理作为控制对相机胶片的光的传输的手段。 快门由至少两个棱镜元件组成，一个面对另一个，另一个可相对于另一个移动，以允许共同的相邻表面从关闭位置移动到打开位置，其中表面在它们之间具有间隔或间隙。 当表面打开时，它们之间具有间隔或间隙，间隙至少稍微比光的波长略大，结果是光被反射而不是从一个棱镜传递到另一个棱镜。 当间隙闭合时，光直接通过一个棱镜传输到另一个棱镜中并从那里传到位于第二棱镜后面的膜。