| 摘要 |
A variable light attenuator of optical connector type. It consists of an alignment adapter, first ferrule fastening means, and second ferrule fastening means. The alignment adapter provides an alignment through hole concentrically passing therethrough along the optical axis thereof. First ferrule fastening means fastens first ferrule whose edge is exposed to an intermediate air gap and is 7 degrees or more inclined to a plane perpendicular to the optical axis, passes the first ferrule through the alignment through hole, and fastens the first ferrule to the alignment adapter. Second ferrule fastening means fastens second ferrule which is almost the same as first ferrule fastening means in both structure and functions, but movable along the optical axis to appropriately set the gap between the first and second ferrules while the edges of the first and second ferrules are kept in parallel by key pin and key groove to specify the designated attenuation.
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