Fiber optic rotary joint with extended temperature range
First Claim
1. A fiber optic rotary joint including an optical derotating element and at least one fiber optic collimator havinga plurality of lenses on a micro lens array,a plurality of optical fibers attached to the micro lens array,a fiber support for fixing the fibers,wherein a spacer is provided between the micro lens array and the fiber support, setting the micro lens array and the fiber support apart from each other, andthe optical fibers have between the micro lens array and the fiber support an excess length greater than the distance between the micro lens array and the fiber support.
1 Assignment
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Accused Products
Abstract
A fiber optic rotary joint has at least one fiber optic collimator. The fiber optic collimator has a plurality of lenses on a micro lens array. Furthermore a plurality of optical fibers are attached to the micro lens array. The fibers are further fixed by a fiber support. A spacer is provided between the micro lens array and the fiber support, setting the micro lens array and the fiber support apart from each other. The optical fibers have between the micro lens array and the fiber support a excess length greater than the distance between the micro lens array and the fiber support. This results in a slight bending of the fibers between the micro lens array and the fiber support. A temperature related extension of parts of the fiber optic rotary joint can be compensated by the excess length and does not lead to mechanical tension on the fibers.
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Citations
13 Claims
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1. A fiber optic rotary joint including an optical derotating element and at least one fiber optic collimator having
a plurality of lenses on a micro lens array, a plurality of optical fibers attached to the micro lens array, a fiber support for fixing the fibers, wherein a spacer is provided between the micro lens array and the fiber support, setting the micro lens array and the fiber support apart from each other, and the optical fibers have between the micro lens array and the fiber support an excess length greater than the distance between the micro lens array and the fiber support.
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7. A fiber optic collimator having
a micro lens array with a plurality of micro lenses, a plurality of optical fibers attached to the micro lens array, a fiber support for fixing the fibers, wherein a spacer is provided between the micro lens array and the fiber support, setting the micro lens array and the fiber support apart from each other, and the optical fibers have between the micro lens array and the fiber support an excess length greater than the distance between the micro lens array and the fiber support.
Specification