Multi-port fiberoptic rotary joint

Details Multi-port fiberoptic rotary joint Multi-port fiberoptic rotary joint

1988-09-07

1989-10-10

Lee, John D.

350 9618, G02B 636

Patent

active

048727377

ABSTRACT:
A multi-port fiberoptic rotary joint comprising a trapezoid prism provided between a rotative member and a fixed member of the rotary joint so as to be rotatable relative to the rotative member and coaxial with said rotative member, a speed change gear mechanism for transmitting the rotation of the rotative member to the trapezoid prism so as to rotate the trapezoid prism at an angular velocity half the angular velocity of the rotative member, rhomboid prisms provided on the entrance side of the trapezoid prism so as to optically guide the light coming from a region outside an aperture of the trapezoid prism to the trapezoid prism as the light parallel to the axis of the trapezoid prism within the aperture thereof, and the rhomboid prisms provided on the exit side of the trapezoid prism so as to optically guide the light emanating from the trapezoid prism to a region outside the aperture of the trapezoid prism, a plurality of pairs of convergent lenses respectively provided to the rotative member and the fixed member, the convergent lenses of each pair optically facing each other via the rhomboid prisms, the trapezoid prism and the rhomboid prisms, and entrance and exit side optical fibers respectively connected to the entrance and exit surface side convergent lenses.

REFERENCES:
patent: 3350156 (1967-10-01), Adams
patent: 4671613 (1987-06-01), Buhrer
patent: 4725116 (1988-02-01), Spencer et al.

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