Optical fiber LED assembly

摘要

An optical fiber LED assembly for coupling the light from a can-shaped light emitting element (1) to an optical fiber (13) via a rod lens (9) 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 (1) which radiates light through a transparent aperture-covering plate (5) at the top of the can (3). The can-shaped light emitting element (1) is supported by a first cylindrical holder (8). A second cylindrical holder (10) supports a rod lens (9) with distributed refractive index at one end thereof and accepts and supports the distal end of an optical fiber ferrule (11). The second cylindrical holder (10) is inserted and fixed in the first cylindrical holder (8), the rod lens (9) with distributed refractive index being directed toward the transparent aperture-covering plate (5) of the light emitting element (1). A seal ring (19) is inserted between the light emitting element (1) and the second holder (10) in the first holder (8) and a refractive index matching agent (18) is hermetically charged in the space formed by the transparent aperture-covering plate (5) and the second holder (10). <IMAGE>