APPARATUS FOR TRANSMITTING OPTICAL SIGNALS FROM INPUT OPTICAL WAVEGUIDE TO OUTPUT OPTICAL WAVEGUIDE (VERSIONS) Russian patent published in 2011 - IPC G02B6/34 G02B6/26 

FIELD: physics.

SUBSTANCE: apparatus has two collimating units which can turn relative each other around an axis of rotation, and one optical element which compensates for rotation. A first power splitter receives input signals and splits said signals into at least two signals for transmission over at least two optical channels through the collimating units and the optical element compensating for rotation. After passing through the second collimating unit, the signals are combined into one signal in a second power splitter. A version of the apparatus has an optical attenuator which is connected to one component from the first collimating unit, the second collimating unit and the optical element compensating for rotation, or a gear which rotates the optical attenuator. In one of the versions, the attenuator is controlled by a controller.

EFFECT: minimisation of change in attenuation in a rotary joint during rotation, as well as provision for transmission of analogue optical signals which carry information encoded in the amplitude or level of the signal.

17 cl, 9 dwg