H - Electricity – 01 – L
Patent
H - Electricity
01
L
345/62
H01L 33/00 (2006.01) H01S 5/026 (2006.01) H01S 5/183 (2006.01)
Patent
CA 1245331
-23- ABSTRACT OF THE DISCLOSURE ''AN OPTICAL DEVICE FOR CONCENTRATING THE LIGHT RADIATION EMITTED BY A LIGHT EMITTING DIODE, AND A LIGHT EMITTING DIODE COMPRISING A DEVICE OF THIS NATURE'' The invention relates to a device for the optical coupling between a light emitting diode and a radiation pickup such as an optical fibre. the light emitting diode element comprises at least one emissive section within an active layer whereof a part of the light radiation does not emerge from the diode element if it is emitted under an excessive angle of incidence. For the purpose of improving the optical output of a diode of this nature, the invention specifies that a lenticular element forming either a semi-cylindrical lens or a semi-toroidal lens is to be associated with the emissive section. In one form possessing a very satisfactory optical output, the device comprises a circular central lens and a plurality of semi-toroidal lenses concentric with respect to the central lens, and associated with annular emissive sections. Applications to electro-optical systems on fibres, such as in telecommunications, office automation, data processing.
467183
Goudreau Gage Dubuc
Thomson-Csf
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