Stationary sunlight redirecting element and system

摘要

A low-cost sunlight redirecting element (110) including multiple substantially identical redirecting structures (112) uniformly arranged and fixedly disposed on a base, where each redirecting structure includes multiple optical surface regions (115,116) that are cooperatively formed and arranged such that, when the sunlight redirecting element is operably fixedly oriented relative to a stationary target with sunlight directed along an incident direction onto the redirecting structures, at least some of the sunlight is transmitted between the corresponding optical surface regions of each redirecting structure, and redirected from the corresponding optical surface regions toward the target's surface. The optical surface regions (115,116) are shaped and arranged to redirect the sunlight toward the fixed target surface even when the sunlight's incident angle direction changes during the course of a year. A stationary sunlight redirecting system (e.g., an architectural daylighting arrangement or PV farm) includes the sunlight redirecting element maintained in a fixed relationship to the stationary target surface.