Anidolic lighting

[3] Prism tiles were designed to bend sunbeams coming through a window upwards, so that they would reach deeper into a room.

[3] Daylight redirecting window film (DRF) is a thin, flexible plastic version of the old glass prism tiles.

[4] Anidolic mirror lighting systems can be divided into three parts: Architectural design also require optimal integration into the building facade.

An even capture pattern alleviates the need for a solar tracker: a permanently fixed anidolic collector remains effective at any time of day.

A second CPC or CEC mirror acting as an angle transformer[6] disperses this beam into a wide-angle, diffused pattern.

[2] Integrated anidolic systems reduce external protrusion and attempt to visually blend into traditional facades.

Basic zenithal daylighting arrangement. An external parabolic or elliptical mirror captures zenithal daylight, and converges it, to let it pass through a narrow opening in the exterior wall. On the inside, two parabolic mirrors widen the beam to around 60°. The floor area next to the conventional window is lit by the window.
A simple light tube , showing collection, transmission, and distribution