title: Angular distribution of light transmitted by a cylindrical guide.
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: [equation]. The over-all transmission of the guide is also evaluated in the various cases.
authors.forename: V
authors.initials: V
authors.lastname: Maxia
authors.forename: M
authors.initials: M
authors.lastname: Murgia
authors.forename: F
authors.initials: F
authors.lastname: Testa