Abstract
In this paper the problem of the light transmission through a cylindrical guide is analyzed. Equations are derived that allow us to evaluate the off-axis distribution of rays both with and without optical contact between the light source and the guide. In the latter case a very peculiar behavior is found for values of the refractive index satisfying the condition: . The over-all transmission of the guide is also evaluated in the various cases.
© 1973 Optical Society of America
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