Optical coupling

摘要

An optical coupling prevents light from entering free space when disengaged. The optical coupling includes a receptacle and a connector plug. The receptacle has an opening and includes an optical radiation source, and a beam stop. The optical radiation engages the beam stop when the receptacle is disengaged from the connector plug. When the connector plug is engaged into the receptacle opening, optical radiation from the receptacle is emitted on the radiation receptor.