Multiple pass optical rotary joint

Details Multiple pass optical rotary joint Multiple pass optical rotary joint

1985-09-16

1988-02-16

Lee, John

350 9618, 350486, 350618, G02B 636

Patent

active

047251166

ABSTRACT:
The invention relates to a multiple pass optical rotary joint which can simultaneously transmit optical signals along two or more channels in either of two directions. The joint uses a rotor and a stator to each of which is connected a plurality of optical fibers. Within the joint reflecting mirrors are used to redirect off-axis optical signals onto the joint axis, with relative rotation occurring while the signals are on-axis. A rotating member for each channel has a mirror for reflecting the on-axis signal portion off-axis to a receptor fiber. Alignment between the rotating member and the receptor fiber, as well as drive for the rotating member, is provided by a pair of magnets of opposite polarity, one being secured to the rotating member and the other being secured to the rotor. The magnetic interaction ensures synchronous rotation of the rotor and the rotating member. Specific embodiments in which transmission losses can be minimized are also disclosed.

REFERENCES:
patent: 4175832 (1979-11-01), Umeki et al.
patent: 4516837 (1985-05-01), Soref et al.
patent: 4650277 (1987-03-01), Husher et al.

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