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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
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reduce external protrusion and attempt to visually blend into traditional facades. However, like other anidolic systems, they are susceptible to glare and offer no protection from overheating on sunny days.
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were designed to bend sunbeams coming through a window upwards, so that they would reach deeper into a room. They were placed in the upper parts of window frames, where they were called "transom lights".
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A second CPC or CEC mirror acting as an angle transformer disperses this beam into a wide-angle, diffused pattern. If it transmits light from a wide external CPC, a light tube actually becomes a flat
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407:, followed by a 0.9 metre long interior CPC, to deliver captured light into the back of the room. This arrangement provided 32% energy savings over a six-month period compared to a reference facade.
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313:(CPC) or elliptical collector (CEC) mounted on the exterior wall. These mirrors provide a wide and even collection pattern. The vertical capture angle approaches 90 degrees, from the
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For example, the external CPC in the reference lights a 6-metre deep room. It protrudes 0.67 metres from the exterior wall and employs a 3.6 metre long, 0.5 meter tall
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were set into floors or sidewalks to let light into a basement below. The underside was frequently extended into prisms to direct and spread the light.
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Research in
Building Physics: Proceedings of the 2nd International Conference on Building Physics, 14–18 September 2003, Antwerpen, Belgium
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161:(DRF) is a thin, flexible plastic version of the old glass prism tiles. It can be used as a substitute for opaque blinds.
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Daylight
Redirecting Film (DRF), essentially a prism tile with very tiny prisms, sending light up onto the ceiling
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to redirect daylight. Some forms of prism lighting have been used for centuries, and others are 21st-century.
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and direct it deeply into rooms, while also scattering rays to avoid glare. The human eye's response to light
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It is most challenging to effectively capture and redistribute light on cloudy, overcast days, when the
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to the vertical plane of the supporting wall. An even capture pattern alleviates the need for a
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Two different prescriptions of prism tiles, showing their differing effects on the light
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371:). Instead, light is directed into the building through a relatively wide opening.
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321:: a permanently fixed anidolic collector remains effective at any time of day.
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363:, architectural CPC mirrors do not concentrate captured light into a single
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to light rooms. Light redirected by these systems does not converge to a
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Architectural design also require optimal integration into the building
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See Chaves, pp.75, for a discussion on angle transformer properties.
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Anidolic mirror lighting systems can be divided into three parts:
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Basic zenithal daylighting arrangement. An external parabolic or
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were set into the upper decks of ships to light the decks below.
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mirrors. Lenses are frequently made in multiple sections, like a
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distribution of captured light to target areas inside the rooms
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264:
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Daylighting a shop with a shop window using prism tile transoms
328:(usually double-glazed windows over the zenithal opening) and
524:, U.S.A. Department of Defense ESTCP Project number EW-201014
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to reduce excessive lighting, glare and heat on sunny days.
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The same light, redistributed by prism tiles in the window.
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optimal transmission of the light (via anidolic ceilings,
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Anidolic lighting uses non-imaging mirrors, lenses, and
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Transom light. The upper part of the window is made of
351:, showing collection, transmission, and distribution
335:Snow and weatherproofing are also a consideration.
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134:Lens systems use reflection and refraction within
613:"Advances in daylighting and artificial lighting"
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635:
324:External parabolic collectors require proper
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209:, so the light passing through them is bent.
540:: CS1 maint: numeric names: authors list (
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193:. Multi-prism vault lights were also made.
189:Single vault light pendant prism, showing
173:The basement under a sidewalk daylit with
518:Padiyath, Raghunath; 3M company (2013),
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66:or form an image, hence the name (from
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309:Typically, light is captured with a
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589:Introduction to Nonimaging Optics
521:Daylight Redirecting Window Films
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159:Daylight redirecting window film
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367:or focal line (which creates a
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276:daylight capture, usually with
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1:
644:Architectural lighting design
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437:Passive solar building design
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311:compound parabolic collector
7:
410:
392:Integrated anidolic systems
60:anidolic optical components
36:Uneven light from a window.
10:
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611:J.-L. Scartezzini (2003).
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127:
21:Daylighting (architecture)
18:
417:Architectural light shelf
387:Architectural integration
191:total internal reflection
56:Anidolic lighting systems
619:. Taylor & Francis.
120:and anidolic ceilings.
116:. Light guides include
586:Chaves, Julio (2015).
355:Unlike the industrial
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269:
104:Mirrors are typically
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81:to capture exterior
592:(Second ed.).
361:solar concentrators
94:sunlight is diffuse
572:Scartezzini, p. 15
487:Scartezzini, p. 14
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626:978-90-5809-565-7
357:parabolic troughs
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381:anidolic ceiling
263:mirror captures
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100:Optical elements
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442:Pavement lights
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326:heat insulation
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146:Pavement lights
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70:, without, and
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38:
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34:
23:
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16:Indoor lighting
12:
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603:978-1482206739
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554:Chaves, p. 146
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136:optical prisms
130:Prism lighting
128:Main article:
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19:Main article:
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502:"Prism glass"
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465:Chaves, p. 72
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330:roller blinds
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319:solar tracker
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87:is non-linear
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526:, retrieved
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500:Macky, Ian,
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375:Distribution
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339:Transmission
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175:vault lights
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150:
140:
133:
124:Lens systems
114:Fresnel lens
103:
91:
79:light guides
76:
71:
67:
55:
54:
422:Daylighting
369:fire hazard
365:focal point
288:light tubes
207:prism tiles
152:Prism tiles
142:Deck prisms
118:light pipes
64:focal point
528:2017-10-09
453:References
432:Light tube
427:Deck prism
405:light tube
349:light tube
305:Collection
261:elliptical
110:elliptical
74:, image).
594:CRC Press
347:A simple
282:collector
106:parabolic
638:Category
536:citation
506:Glassian
411:See also
359:used in
278:zenithal
265:zenithal
83:sunlight
580:Sources
447:Sunroom
399:Example
315:horizon
290:, etc.)
268:window.
72:eidolon
623:
600:
299:facade
280:light
621:ISBN
598:ISBN
542:link
58:use
108:or
640::
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538:}}
534:{{
504:,
492:^
470:^
383:.
301:.
96:.
68:an
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544:)
177:.
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