FIELD: physics.
SUBSTANCE: distal portion of an optical fibre is placed in a ferrule with spacing on the entire length and the end of the optical fibre is welded onto the inner surface of the welded portion of the ferrule. The required radiation distribution at the output of the tool can be obtained by varying the thickness of the welded portion of the ferrule and the shape of the external optically refracting surface.
EFFECT: simple design.
6 cl, 3 dwg
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