title: Right angle bends in light pipes: analysis.
abstract: An expression for the fraction of incident radiation transmitted by a right angle bend in a rectangular light pipe is derived. This expression is used to show that, in a planar light pipe structure with right angle bends, light attenuation is due only to reflection losses at the walls if the launching angle is 45 degrees .
authors.forename: M D
authors.initials: MD
authors.lastname: Wagh
authors.forename: B V
authors.initials: BV
authors.lastname: Rao