Patent ID: 6854897

Claim:
A ferrule part comprising: a ferrule having first and second end faces and a groove, said first and second end faces intersecting a first axis, said groove extending along a second axis, and said second axis intersecting said first axis to form an acute angle, said groove being provided along a plane defined by said second axis and a third axis perpendicular to said first and second axes, said groove extending across said ferrule along said second axis; an optical part provided in said groove so as to intersect said first axis, said optical part having a pair of surfaces, said optical part being capable of transmitting a part of light incident on said one surface of said pair of surfaces of said optical part, and said optical part being capable of reflecting a part of light incident on said one surface of said pair of surfaces of said optical part to form a reflected light component from said incident light; a first optical fiber supported in said ferrule, said first optical fiber having one end, said one end of said first optical fiber facing said one surface of said pair of surfaces of said optical part; and a second optical fiber supported in said ferrule, said second optical fiber having one end, said one end of said second optical fiber facing the other face of said pair of faces of said optical part; wherein said ferrule transmits said reflected light component and further includes a side surface through which said transmitted light passed.