| 摘要 |
Antireflecting device for optical guide in which one entrance face 30 at least is covered with an antireflection layer 32 such that it exhibits a first Fresnel coefficient at the ambient medium/antireflection layer interface and a second Fresnel coefficient at the antireflection layer/optical guide interface. Moreover, the entrance face 30 is inclined with respect to the direction of an incident beam, so that the two Fresnel coefficients have the same absolute value. Lastly, the thickness of the antireflection layer 32 is such that the reflections of the incident beam on the two interfaces give rise to reflected beams in phase opposition. <IMAGE>
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