Photo-electric control device

Abstract

Abstract A switching device comprises two optical fibres disposed in two respective supports located one in line with the other. One of these supports is articulated about a transverse axis and loaded by a leaf spring which tends to space its free end from the adjacent end of the other support. The adjacent ends of these supports have oblique faces whose angles are supplementary and the movable support has a window exposing a portion of the fibre adjacent to its bevelled end. This fibre is associated with a light-emitting diode and the other fibre with a photodetector. When the adjacent ends of the fibres are spaced apart the light is reflected through the window, and when they are in optical contact the light is transmitted to the photodetector.

Inventors

• 👤 Allan Lewis Harmer

Bibliographic Details