Patent ID: 6512878
Filing Date: 2003-01-28
Classification: G02B

Abstract:
A variable optic attenuator comprising:a body adapted to be coupled to a mating device, the body defining an axially extending bore and having an axially rear end; and a double screw mechanism adapted to carry a first optic fiber and attached to the rear end of the body with the first optic fiber extending through the bore of the body to axially align with but separated from a second optic fiber of the mating device, the double screw mechanism comprising: a connecting member attached to the rear end of the body and defining an inner-threaded bore, a tubular knob having external threading of first screw pitch and inner threading of second screw pitch, the first and second screw pitches being different, the tubular knob being partially received in the connecting member with the external threading of the knob mating the inner threaded bore of the connecting member, and an elongate rod defining a central bore adapted to receive and retain the first optic fiber therein, the rod being received in the tubular knob with the first optic fiber extending beyond a front end of the body, the rod having external threading mating the inner threading of the knob.