Science Fair Project Encyclopedia
Launch angle
In telecommunication, the term launch angle has the following meanings:
1. The angle, with respect to the normal, at which a light ray emerges from a surface.
2. The beam divergence at an emitting surface, such as that of a light-emitting diode (LED), laser, lens, prism, or optical fiber end face.
3. At an end face of an optical fiber, the angle between an input ray and the fiber axis .
If the end face of the fiber is perpendicular to the fiber axis, the launch angle is equal to the incidence angle when the ray is external to the fiber and the refraction angle when initially inside the fiber.
Last updated: 06-03-2005 07:56:22
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details