G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/26 (2006.01) G02B 26/02 (2006.01) G02B 6/38 (2006.01)
Patent
CA 2265157
A variable attenuation type optical power attenuator permits easier adjustment of the amount of optical attenuation and it is able to securely maintained an adjusted or set amount of attenuation. The variable attenuation type optical power attenuator employs a fixed ferrule and a rotating ferrule that have their end surfaces polished, together with the central optical fibers thereof, to be formed into inclined end surfaces. An alignment sleeve supports the fixed and rotating ferrules with optical fibers so that the distal ends thereof are opposed and that the ferrules may be relatively rotated, thus making up an assembly composed of a pair of ferrules. The assembly of the paired ferrules is supported in a rotating housing by a fixed housing. The variable attenuation type optical power attenuator adjusts the distance between the optical fiber end of the fixed ferrule and that of the rotating ferrule by rotating the rotating housing to change the relative rotational angle in relation to the fixed housing. The new rotational angle thus obtained is maintained by the engagement between the face ratchet of a ratchet ring provided on the fixed housing and the face ratchet of the rotating housing.
Kirby Eades Gale Baker
Seikoh Giken Co. Ltd.
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