Patent ID: 9429717
Filing Date: 2016-08-30
CPC Classification: G02B

Claim Text:
1. A ferrule for optically connecting an optical fiber to an optical part, the ferrule comprising: a boot accommodating hole which is configured to accommodate a boot attached to the optical fiber and which is formed on a rear end surface of the ferrule; an optical fiber hole which is configured to position an intermediate portion of the optical fiber having an outer diameter and which extends forward from a front end of the boot accommodating hole; and a recess configured for an adhesive to be disposed therein and comprising a first inner wall from which a front end of the optical fiber positioned by the optical fiber hole is protrudable, and a second inner wall opposite to the first inner wall, wherein: the second inner wall is configured to be abutted by almost an entire area of a front end surface of the optical fiber; a bottom of the recess is positioned lower than a lower edge of the front end of the optical fiber that protrudes from the first inner wall; the recess comprises an adhesive application slot with an opening larger than a distance between the first inner wall and the second inner wall, the first inner wall comprising a first inclined surface, and the second inner wall comprising a second inclined surface which does not reach a front face of the ferrule; and the distance between the first inner wall and the second inner wall is greater than or equal to half of the outer diameter of the optical fiber and less than or equal to four times the outer diameter of the optical fiber, wherein the ferrule further comprises further comprises a reflecting portion reflecting light on an optical path between the front end of the optical fiber positioned by the optical fiber hole and the optical part, wherein a plurality of the optical fibers is fixed, and the reflecting portion comprises a recessed reflecting surface and is provided to each of the plurality of the optical fibers, and wherein a plurality of the reflecting portions is arranged in an arrangement direction of the plurality of the optical fibers.