ROTARY CIRCULATION SIGNAL DATA COUPLER

摘要

An electro- optical arrangement for transmitting signal data as modulated light energy across a rotating annular interface. The modulated light beams according to the system are projected axially within an annular cavity (17) and thence outward through a redundant window arrangement (15, 16). Another annular member (10) rotatable with respect to the first one (17) includes a plurality of closer-spaced but narrower second windows (12, 13) and a light-to-electric transducer (25) associated with each second window. The spacing (S2) the second windows is such that there is always light communication between the first and second window groups. The system is particularly adapted to digital modulation of the light energy.