OPTICAL FIBER LED ASSEMBLY

摘要

An optical fiber LED assembly for coupling the light from a can-shaped light emitting element to an optical fiber via a rod lens with distributed refractive index provides improved stability by controlling the deterioration with the lapse of time. The optical fiber LED assembly employs a can-shaped light emitting element which radiates light through a transparent aperture-covering plate at the top of the can. The can-shaped light emitting element is supported by a first cylindrical holder. A second cylindrical holder supports a rod lens with distributed refractive index at one end thereof and accepts and supports the distal end of an optical fiber ferrule. The second cylindrical holder is inserted and fixed in the first cylindrical holder, the rod lens with distributed refractive index being directed toward the transparent aperture-covering plate of the light emitting element. A seal ring is inserted between the light emitting element and the second holder in the first holder and a refractive index matching agent is hermetically charged in the space formed by the transparent aperture-covering plate and the second holder.