Combination of Concave and Convex Paraboloids: Theoretical Model of New-type Daylighting System

Abstract

We investigate the behaviour of a new-type daylighting system composed of concave and convex paraboloidal mirrors. This system realises converting parallel light into highly-dense parallel before passing through the focal point. It means that the system solves one of the significant problems in daylighting systems: heat problems. In this paper, we set up the theoretical model of our new-type daylighting system, check the model using the two-dimensional ray-tracing code, confirm the relation between simulated data and simulation resolutions, introduce convenient contour maps and three type performance indexes and estimate the performance of our system.