Patent ID: 6970622
Filing Date: 2005-11-29
Classification: G02B,G02F

Abstract:
1. A method of controlling the transmission of a light signal, comprising: (a) transmitting said light signal through a first fiber optic line; and (b) receiving said light signal with a light receiving unit operatively coupled to said first fiber optic line, said light receiving unit being operative to refract said light signal so that said light signal is substantially prevented from being transmitted through said light receiving unit if an intensity level of said light signal has a predetermined relationship with an intensity threshold level, such that when the intensity level of the received light signal is on one side of the intensity threshold level, the light signal is substantially prevented from being transmitted, and when the intensity level of the received light signal is on an opposite side of the intensity threshold level, the light signal is substantially permitted to be transmitted, there being a substantial change in the amount of the received light signal that is transmitted as the intensity level of the received light signal passes through the intensity threshold level.