Fiber optic rotary joint

Optical waveguides – With optical coupler – Movable coupler

Reexamination Certificate

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Details

C385S025000

Reexamination Certificate

active

06907161

ABSTRACT:
This invention eliminates the lens/prism assemblies and the multiple pick-up fibers that must be multiply lensed to a detector to get sufficient signal strength for the system to work. This invention also compensates for some of the rapid rise and fall time of the present system. A single pick-up, either a fiber or a photodiode, is placed at the end of a waveguide. A lens or lens system is used to focus a single optical signal on to the fiber face or the photodiode active area. Various light injection techniques, such as fibers, fiber/lens assemblies, lensed VCEL, lasers, or LEDs can be utilized because of the location in the system.

REFERENCES:
patent: 4525025 (1985-06-01), Hohmann et al.
patent: 5991478 (1999-11-01), Lewis et al.
patent: 6102173 (2000-08-01), Tuttlebee
patent: 6104849 (2000-08-01), Lewis et al.
patent: 6128426 (2000-10-01), Einhorn
patent: 6385367 (2002-05-01), Rogers et al.

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