Patent
1981-11-12
1984-08-21
Lee, John D.
350 9610, G02B 5172
Patent
active
044666977
ABSTRACT:
The optical lightpipes are provided with an internal structural configuration which enables the pipes to either transmit light with greater efficiency or to emit light more effectively along the length of the lightpipe. For light emission, light transmitting optical fibers are doped in the core region with refractive and/or reflective light scattering particles. When with a single optical fiber lightpipe, ribs are formed on the exterior of the lightpipe to prevent the lightpipe from being deformed to an angle greater than the critical angle for light conductance. A single tubular lightpipe of plastic may be formed with an internal reflective layer and outer ribs to control bending of the pipe.
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"Handbook of Fiber Optics: Theory and Applications", Helmut Wolf Ed., pp. 257-258, Garland STPM Press, 1979.
Gonzalez Frank
Lee John D.
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