Optical fiber microlens
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United States of America Patent
Stats
-
Jul 27, 1993
Grant Date -
N/A
app pub date -
Jun 22, 1992
filing date -
Jun 22, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A microlens assembly for use with an optical fiber or fiber bundle that requires no crimping or mechanical distortion of the optical fiber. The microlens assembly has a front lens mounting portion and a rear portion. The rear portion is a cylindrical tube which is bonded to the sheath and cladding of the optical fiber or fiber bundle by means of suitable adhesive. The front lens mounting portion which houses the output lens is also tubular, having an inner diameter greater than the outer diameter of the rear portion. The front lens mounting portion is slid over the rear portion until the desired distribution of light emanating from the lens is achieved. The front lens mounting portion is then locked into position by bonding it to the rear portion by means of an appropriate adhesive. The adhesives are stable at high temperature and have an index of refractions suitable for preventing refractive loss of light from the lateral walls of the fiber core. In one embodiment, the cylindrical space in the microlens assembly between the output lens and the tip of the optical fiber or fiber bundle is filled with an optically transparent fluid or elastomer such as silicone. The filling excludes body fluids from entering the microlens assembly.
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