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Safety Closure For Fiber-Optic Devices

IP.com Disclosure Number: IPCOM000068096D
Original Publication Date: 1979-Nov-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Noel, FE Stilwell, GR Uberbacher, EC [+details]

Abstract

In the interconnection of fiber-optic materials, such as plastic, glass, and plastic-clad silica fibers, for signal transmission via light energy, the light source can be of several types, such as LED, LASER, or even an incandescent source. However, they all produce a narrow cone of light at the exit of the fiber due to the small fiber size and the numerical aperture of the fiber. Thus, if the light energy coupled to the fiber is sufficient, a potential safety hazard in the form of concentrated light energy could occur at each connection point in the fiber link. Concentrated light energy can produce both thermal and photochemical damage to the human eye, and is particularly dangerous when the light is not in the visible range (for example, infrared, the most useful transmission wavelengths, or even ultraviolet).