Concept

Anidolic lighting

Résumé
Anidolic lighting systems use anidolic optical components to light rooms. Light redirected by these systems does not converge to a focal point or form an image, hence the name (from an, without, and eidolon, image). Anidolic lighting uses non-imaging mirrors, lenses, and light guides to capture exterior sunlight and direct it deeply into rooms, while also scattering rays to avoid glare. The human eye's response to light is non-linear, so a more even distribution of the same amount of light makes a room appear brighter. It is most challenging to effectively capture and redistribute light on cloudy, overcast days, when the sunlight is diffuse. Optical elements Mirrors are typically parabolic or elliptical mirrors. Lenses are frequently made in multiple sections, like a Fresnel lens. Light guides include light pipes and anidolic ceilings. Lens systems Prism lighting Lens systems use reflection and refraction within optical prisms to redirect daylight.
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