Optical device for concentrating the light radiation emitted by a light emitting diode, and a light emitting diode comprising a device of this nature
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United States of America Patent
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Oct 27, 1987
Grant Date -
N/A
app pub date -
Nov 1, 1984
filing date -
Nov 4, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for optically coupling a light emitting diode and a radiation pickup such as an optical fiber. The light emitting diode element includes at least one emissive section within an active layer where a part of the light irradiation does not emerge from the diode element if it is emitted at an excessive angle of incidence. A lenticular element in the form of either a semi-cylindrical lens or a semi-toroidal lens is associated with the emissive section. In one form, the device includes a circular central lens and a plurality of semi-toroidal lens concentric with respect to the central lens and associated with annular emissive sections.
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